{"title":"Flow - Gas (QG)","description":"","products":[{"product_id":"qgka-gasturbinenzahler-mit-flansch","title":"QGKA gas turbine flowmeter, flanged","description":"\u003cp\u003eThe \u003cstrong\u003eQGKA\u003c\/strong\u003e is a turbine flowmeter for gas with flange connection. It is particularly suited to measuring gas volume flow in pipes DN25 to DN300 where flow, total, temperature and pressure are to be read on the device.\u003c\/p\u003e\n\u003cp\u003eTurbine principle, the gas drives a bladed rotor and the electronics count its revolutions. Flow range \u003cstrong\u003e2.5 … 6500 m³\/h\u003c\/strong\u003e depending on nominal size, lower limit at a flow velocity of 0.5 m\/s. Accuracy \u003cstrong\u003eclass 1.5\u003c\/strong\u003e. Output \u003cstrong\u003e4 … 20 mA, pulse and RS485\u003c\/strong\u003e, an RS485 protocol is not documented. The supply voltage is not documented. LCD display with keys on the head. Process connection flange, \u003cstrong\u003eDN25 … DN300\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eBody of aluminium alloy or stainless steel, nominal pressure 1.6 MPa in both size tables. Medium temperature -20 … +80 °C, ambient temperature -20 … +50 °C. The protection grade is not documented. Explosion protection per datasheet Ex ib IIB T4; certificate, notified body and ATEX or IECEx number are not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: the order code offers eight pressure ratings from 1.6 to 42 MPa, the size tables give only 1.6 MPa for every size. DN32, DN40, DN65 and DN125 exist in stainless steel only, DN200, DN250 and DN300 in aluminium only. Supply voltage, wiring diagram and pin assignment are missing.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTurbine principle for gas, 2.5 … 6500 m³\/h\u003c\/li\u003e\n\u003cli\u003eNominal sizes DN25 … DN300 with flange connection\u003c\/li\u003e\n\u003cli\u003eAccuracy class 1.5 with non-linear correction\u003c\/li\u003e\n\u003cli\u003eTemperature and pressure compensation in the head as an option\u003c\/li\u003e\n\u003cli\u003eLCD display for flow, total, temperature and pressure\u003c\/li\u003e\n\u003cli\u003eOutputs 4 … 20 mA, pulse and RS485\u003c\/li\u003e\n\u003cli\u003eInstrument factor set on site by key\u003c\/li\u003e\n\u003cli\u003eBody of aluminium alloy or stainless steel\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453620756806,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKA_produkt.webp?v=1790331840"},{"product_id":"qgkb-drallwirbel-durchflussmesser-fur-gas","title":"QGKB precession vortex gas flowmeter","description":"\u003cp\u003eThe \u003cstrong\u003eQGKB\u003c\/strong\u003e is a precession vortex flowmeter for gas with pressure and temperature measurement in the same housing. It is particularly suited to measuring working and standard volume flow of gas with automatic correction of temperature, pressure and compression factor.\u003c\/p\u003e\n\u003cp\u003ePrecession vortex principle, the gas is set spinning and the precession frequency of the swirl centre is counted. Flow range \u003cstrong\u003e0.3 … 3600 m³\/h\u003c\/strong\u003e depending on nominal size. System accuracy after correction \u003cstrong\u003eclass 1.0 or 1.5\u003c\/strong\u003e. Outputs \u003cstrong\u003e4 … 20 mA and pulse, isolated, limit alarms and RS485\u003c\/strong\u003e up to 1.2 km. Supply \u003cstrong\u003e24 V DC ± 15 %\u003c\/strong\u003e or 3.6 V lithium cell. Dot matrix display for volume flow, totals, pressure and temperature. Nominal sizes \u003cstrong\u003eDN15 … DN200\u003c\/strong\u003e, inlet run 10 × DN, outlet run 5 × DN.\u003c\/p\u003e\n\u003cp\u003eBody of stainless steel or aluminium alloy, process connection flange, nominal pressure 1.6, 2.5 or 4.0 MPa. Medium temperature -20 … +80 °C, ambient temperature -30 … +65 °C. Protection grade IP65, cable entry M20 × 1.5. Explosion protection per datasheet Ex d IIB T4 and Ex ia IIC T4 without assignment to a version, a certificate is not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: according to the order code the battery version has neither display nor output, all display and output data apply to the mains version only. Which version carries Ex d and which Ex ia is not stated. For versions A and B the table gives only one range per size.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatic correction of temperature, pressure and compression factor\u003c\/li\u003e\n\u003cli\u003eFlow range 0.3 … 3600 m³\/h, DN15 … DN200\u003c\/li\u003e\n\u003cli\u003eSystem accuracy class 1.0 or 1.5\u003c\/li\u003e\n\u003cli\u003eDot matrix display, head turns 360°\u003c\/li\u003e\n\u003cli\u003e4 … 20 mA and pulse isolated, RS485 up to 1.2 km\u003c\/li\u003e\n\u003cli\u003eLimit alarms for upper and lower value\u003c\/li\u003e\n\u003cli\u003eDaily and monthly records kept for five years\u003c\/li\u003e\n\u003cli\u003eProtection grade IP65\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453620789574,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKB_produkt.webp?v=1790331840"},{"product_id":"qgkc-mems-gasmassedurchflussmesser-led-anzeige","title":"QGKC MEMS gas mass flowmeter, LED display","description":"\u003cp\u003eThe \u003cstrong\u003eQGKC\u003c\/strong\u003e is a thermal MEMS mass flowmeter for small gas flows with a four-digit LED display, in the bores DN3 and DN8. It is particularly suited to clean, dry gases where the mass flow is to be measured directly without temperature or pressure compensation; it is calibrated for one gas chosen in the order code.\u003c\/p\u003e\n\u003cp\u003eThermal MEMS chip, the gas carries heat away from the sensor, which gives the mass flow directly. Full scale \u003cstrong\u003e2, 3, 4 or 5 SLPM\u003c\/strong\u003e on DN3 and \u003cstrong\u003e10 … 50 SLPM\u003c\/strong\u003e on DN8, turndown 100:1. Accuracy \u003cstrong\u003e± (1.5 + 0.2 F.S.) %\u003c\/strong\u003e, read as 1.5 % of reading plus 0.2 % of full scale, repeatability \u003cstrong\u003e0.25 %\u003c\/strong\u003e, response time 10 ms. Outputs \u003cstrong\u003eRS485 or RS232\u003c\/strong\u003e and linear \u003cstrong\u003e0.5 … 4.5 V\u003c\/strong\u003e. Supply \u003cstrong\u003e8 … 24 V DC, 50 mA\u003c\/strong\u003e. Connection via five-pin socket.\u003c\/p\u003e\n\u003cp\u003eProcess connection BSPT 1\/4 (R1\/4) or, on DN3, a 4, 6 or 8 mm push-in fitting. Working pressure 0.5 MPa maximum, pressure loss at full scale 100 Pa (DN3) or 600 Pa (DN8). Operating temperature -10 … +55 °C, humidity below 95 % RH without icing or condensation. Body material, protection grade and explosion protection are not stated. A declaration of conformity is not documented in the datasheet. Before sizing, note: the 50 SLPM full scale is in the parameter table but has no order code. For oxygen and hydrogen there is no statement on suitability or ignition protection. Pin assignment and mating connector of the socket are not documented.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect mass flow measurement without temperature or pressure compensation\u003c\/li\u003e\n\u003cli\u003eTurndown 100:1\u003c\/li\u003e\n\u003cli\u003eRepeatability 0.25 %\u003c\/li\u003e\n\u003cli\u003eResponse time 10 ms, 20 … 1000 ms on request\u003c\/li\u003e\n\u003cli\u003eFour-digit LED display for instantaneous and totalized flow\u003c\/li\u003e\n\u003cli\u003eRS485 or RS232 plus analogue output 0.5 … 4.5 V\u003c\/li\u003e\n\u003cli\u003eHighest and lowest value since power-up recorded\u003c\/li\u003e\n\u003cli\u003eCalibration for one of seven gases selectable\u003c\/li\u003e\n\u003cli\u003eCompact, 55 … 77 g\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453624066374,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKC_produkt.webp?v=1790331840"},{"product_id":"qgke-thermischer-gasdurchflusssensor-farbdisplay-ip40","title":"QGKE thermal gas flow sensor, colour display, IP40","description":"\u003cp\u003eThe \u003cstrong\u003eQGKE\u003c\/strong\u003e is a thermal flow sensor for gas with a colour display that turns by 180° and two switch outputs. It is particularly suited to dry air and nitrogen where instantaneous value, total and limits are needed on the device.\u003c\/p\u003e\n\u003cp\u003eThermal mass flow measurement, the gas stream carries heat away from the heated sensor, one flow direction. Rated flow \u003cstrong\u003e2 … 500, 5 … 1000 or 10 … 2000 L\/min\u003c\/strong\u003e by size. Display accuracy \u003cstrong\u003e± 3 % F.S. ± 1 digit\u003c\/strong\u003e, analogue accuracy ± 5 % F.S., repeatability \u003cstrong\u003e± 1 % F.S. ± 1 digit\u003c\/strong\u003e, response time ≤ 100 ms. Outputs: \u003cstrong\u003etwo open-collector switch outputs, NPN or PNP\u003c\/strong\u003e, 125 mA maximum, short-circuit protected, with differential, window, cumulative flow and cumulative pulse modes, plus \u003cstrong\u003e1 … 5 V, 4 … 20 mA or RS485\u003c\/strong\u003e. Supply \u003cstrong\u003e12 … 24 V DC ± 10 %\u003c\/strong\u003e, ≤ 50 mA. Connection via six-core PVC cable Ø 4 mm.\u003c\/p\u003e\n\u003cp\u003ePlastic housing, process connection Rc1\/2, G1\/2, Rc3\/4, G3\/4, G1, R1 or G1-1\/2 by size. Working pressure 0 … 1.0 MPa, pressure resistance 1.5 MPa. Medium and ambient temperature 0 … +50 °C without dew or ice. Protection grade IP40. The EMC standards IEC 61000-6-2 and IEC 61000-6-4 are named; a declaration of conformity is not documented in the datasheet. Before sizing, note: the 3000 and 6000 L\/min sizes appear only in the order code and the dimension drawings, no technical data exist for them. Whether NPN or PNP applies cannot be read unambiguously from the datasheet. The core assignment changes with the output version, so a cable does not fit every version.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eColour display, turns by 180°\u003c\/li\u003e\n\u003cli\u003eShows instantaneous flow, total and percentage of range\u003c\/li\u003e\n\u003cli\u003eTwo switch outputs with window, differential and cumulative modes\u003c\/li\u003e\n\u003cli\u003eAnalogue 1 … 5 V or 4 … 20 mA, alternatively RS485\u003c\/li\u003e\n\u003cli\u003eRepeatability ± 1 % F.S. ± 1 digit\u003c\/li\u003e\n\u003cli\u003eWorking pressure up to 1.0 MPa, pressure resistance 1.5 MPa\u003c\/li\u003e\n\u003cli\u003eEMC to IEC 61000-6-2 and IEC 61000-6-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453624099142,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKE_produkt.webp?v=1790331840"},{"product_id":"qgkf-drehkolbengaszahler-mit-zustandskorrektur","title":"QGKF Roots gas meter with volume correction","description":"\u003cp\u003eThe \u003cstrong\u003eQGKF\u003c\/strong\u003e is a Roots rotary gas meter with temperature and pressure measurement in the same body and automatic conversion to the reference state. It is particularly suited to measuring gas quantities where the volume is to be shown and transmitted referred to 101.325 kPa and 20 °C.\u003c\/p\u003e\n\u003cp\u003ePositive displacement principle, two lobed rotors scoop the gas into fixed portions and the electronics count them. Flow range \u003cstrong\u003e20 … 1600 m³\/h\u003c\/strong\u003e by size, rangeability \u003cstrong\u003e20:1 to 120:1\u003c\/strong\u003e. Accuracy \u003cstrong\u003eclass 1.0 or 1.5\u003c\/strong\u003e. Automatic correction of temperature, pressure and compression factor. Outputs \u003cstrong\u003epulse and RS485\u003c\/strong\u003e (version F) or \u003cstrong\u003e4 … 20 mA, pulse and RS485\u003c\/strong\u003e (version A). Supply by internal battery or external, the voltage is not documented. Three-line LCD with standard volume, standard flow, temperature and pressure. Nominal sizes \u003cstrong\u003eDN25 … DN200\u003c\/strong\u003e, flange connection.\u003c\/p\u003e\n\u003cp\u003eBody of aluminium alloy up to DN100, from DN150 aluminium per table, structure form I square or II round. Flange with bolt circle Ø 75 … Ø 295 mm, flow direction top down. Nominal pressure 1.0 MPa per parameter table, weight 9 kg (DN25) to 125 kg (DN200). Protection grade and explosion protection are not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: which size reaches class 1.0 and which class 1.5 is not stated. The order code offers 1, 5 and 10 bar, data exist for 1.0 MPa only. Supply voltage, battery type, service life and wiring diagram are not documented.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePositive displacement principle with two lobed rotors\u003c\/li\u003e\n\u003cli\u003eRangeability up to 120:1 depending on size\u003c\/li\u003e\n\u003cli\u003eConversion to 101.325 kPa and 20 °C\u003c\/li\u003e\n\u003cli\u003eCorrection of temperature, pressure and compression factor\u003c\/li\u003e\n\u003cli\u003eThree-line high-contrast LCD\u003c\/li\u003e\n\u003cli\u003eOutputs pulse, 4 … 20 mA and RS485\u003c\/li\u003e\n\u003cli\u003eData storage kept through battery change and power failure\u003c\/li\u003e\n\u003cli\u003eNominal sizes DN25 … DN200 with flange\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453624131910,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKF_produkt.webp?v=1790331840"},{"product_id":"qgkh-mems-gasmassedurchflussmesser-r3-4","title":"QGKH MEMS gas mass flowmeter, R3\/4","description":"\u003cp\u003eThe \u003cstrong\u003eQGKH\u003c\/strong\u003e is a thermal MEMS mass flowmeter for gas with R3\/4 thread connection and stainless steel body. It is particularly suited to clean, relatively dry gases up to 1000 slpm; it is calibrated for one gas chosen in the order code.\u003c\/p\u003e\n\u003cp\u003eThermal MEMS chip as a solid-state sensing element without thin membrane; the mass flow is measured directly, no temperature or pressure compensation is needed. Full scales \u003cstrong\u003e300, 500, 600, 800 or 1000 slpm\u003c\/strong\u003e. Accuracy \u003cstrong\u003e± 1.5 % F.S.\u003c\/strong\u003e, response time 20 ms. Outputs \u003cstrong\u003e1 … 5 V or 4 … 20 mA\u003c\/strong\u003e in a three-wire circuit and \u003cstrong\u003eRS485 with Modbus or I²C\u003c\/strong\u003e. Supply \u003cstrong\u003e8 … 24 V DC, 50 mA\u003c\/strong\u003e. Connection via \u003cstrong\u003eM12 × 1\u003c\/strong\u003e connector. OLED display with two of the output versions only. Calibration with air at 0 °C and 101.325 kPa.\u003c\/p\u003e\n\u003cp\u003eBody of stainless steel, aluminium alloy on request. Process connection R3\/4, working pressure 0.8 MPa maximum. Medium temperature -10 … +65 °C, ambient temperature -25 … +85 °C, humidity 0 … 100 % RH. Protection grade IP40. Explosion protection is not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: flow range, maximum pressure, process connection and response time are marked customized or optional, no standard version is stated. The flow figures are standard litres at 0 °C, while the order code writes L\/min without a reference. For oxygen and hydrogen there is no statement on suitability or ignition protection.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect mass flow measurement without temperature or pressure compensation\u003c\/li\u003e\n\u003cli\u003eSolid-state sensor without membrane, resists clogging and pressure shock\u003c\/li\u003e\n\u003cli\u003eWithstands condensation, humidity 0 … 100 % RH\u003c\/li\u003e\n\u003cli\u003eResponse time 20 ms\u003c\/li\u003e\n\u003cli\u003eAnalogue 1 … 5 V or 4 … 20 mA, digital RS485 Modbus or I²C\u003c\/li\u003e\n\u003cli\u003eThread connection R3\/4, stainless steel\u003c\/li\u003e\n\u003cli\u003eShock resistant up to 100 g\u003c\/li\u003e\n\u003cli\u003eM12 × 1 connector\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453624164678,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKH_produkt.webp?v=1790331840"},{"product_id":"qgki-mems-gasmassedurchflussmesser-mpt-1","title":"QGKI MEMS gas mass flowmeter, MPT 1\"","description":"\u003cp\u003eThe \u003cstrong\u003eQGKI\u003c\/strong\u003e is a thermal MEMS mass flowmeter for gas with MPT 1\" thread connection and stainless steel body. It is particularly suited to clean, relatively dry gases up to 1600 slpm; it is calibrated for one gas chosen in the order code.\u003c\/p\u003e\n\u003cp\u003eThermal MEMS chip as a solid-state sensing element without thin membrane; the mass flow is measured directly, no temperature or pressure compensation is needed. Full scales \u003cstrong\u003e500, 600, 800, 1000, 1200 or 1600 slpm\u003c\/strong\u003e. Accuracy \u003cstrong\u003e± 1.5 % F.S.\u003c\/strong\u003e, response time 20 ms. Outputs \u003cstrong\u003e1 … 5 V or 4 … 20 mA\u003c\/strong\u003e in a three-wire circuit and \u003cstrong\u003eRS485 with Modbus or I²C\u003c\/strong\u003e. Supply \u003cstrong\u003e8 … 24 V DC, 50 mA\u003c\/strong\u003e. Connection via \u003cstrong\u003eM12 × 1\u003c\/strong\u003e connector. OLED display with two of the output versions only. Calibration with air at 0 °C and 101.325 kPa.\u003c\/p\u003e\n\u003cp\u003eBody of stainless steel, aluminium alloy on request. Process connection MPT 1\", working pressure 0.8 MPa maximum. Medium temperature -10 … +65 °C, ambient temperature -25 … +85 °C, humidity 0 … 100 % RH. Protection grade IP40. Explosion protection is not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: several figures, among them flow range, maximum pressure and response time, are marked customizable or optional, no standard version is stated. The flow figures are standard litres at 0 °C, while the order code writes L\/min without a reference. For oxygen and hydrogen there is no statement on suitability or ignition protection.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect mass flow measurement without temperature or pressure compensation\u003c\/li\u003e\n\u003cli\u003eSolid-state sensor without membrane, resists clogging and pressure shock\u003c\/li\u003e\n\u003cli\u003eWithstands condensation, humidity 0 … 100 % RH\u003c\/li\u003e\n\u003cli\u003eResponse time 20 ms\u003c\/li\u003e\n\u003cli\u003eAnalogue 1 … 5 V or 4 … 20 mA, digital RS485 Modbus or I²C\u003c\/li\u003e\n\u003cli\u003eThread connection MPT 1\", stainless steel\u003c\/li\u003e\n\u003cli\u003eShock resistant up to 100 g\u003c\/li\u003e\n\u003cli\u003eM12 × 1 connector\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453627703622,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKI_produkt.webp?v=1790331873"},{"product_id":"qgkj-mems-gasmassedurchflussmesser-g3-8","title":"QGKJ MEMS gas mass flowmeter, G3\/8","description":"\u003cp\u003eThe \u003cstrong\u003eQGKJ\u003c\/strong\u003e is a thermal MEMS mass flowmeter for gas with G3\/8 thread connection and stainless steel or aluminium body. It is particularly suited to clean, relatively dry gases up to 200 slpm; it is calibrated for one gas chosen in the order code.\u003c\/p\u003e\n\u003cp\u003eThermal MEMS chip as a solid-state sensing element without thin membrane; the mass flow is measured directly, no temperature or pressure compensation is needed. Full scales \u003cstrong\u003e20, 50, 100 or 200 slpm\u003c\/strong\u003e. Accuracy \u003cstrong\u003e± 1.5 % F.S.\u003c\/strong\u003e, response time 20 ms. Outputs \u003cstrong\u003e1 … 5 V or 4 … 20 mA\u003c\/strong\u003e in a three-wire circuit and digital \u003cstrong\u003eI²C\u003c\/strong\u003e, this series has no RS485. Supply \u003cstrong\u003e8 … 24 V DC, 50 mA\u003c\/strong\u003e. Connection via five leads: SCL, GND, Vin, Vout, SDA. Display module optional in the order code. Calibration with air at 0 °C and 101.325 kPa.\u003c\/p\u003e\n\u003cp\u003eBody of stainless steel or aluminium alloy, selected in the order code. Process connection G3\/8, working pressure 0.8 MPa maximum. Medium temperature -10 … +65 °C, ambient temperature -25 … +85 °C, humidity 0 … 100 % RH. Protection grade IP40. Explosion protection is not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: flow range, maximum pressure, process connection and response time are marked customizable or optional, no standard version is stated. The reference state is given twice and differently, 0 °C and 20 °C at 101.325 kPa. For oxygen and hydrogen there is no statement on suitability or ignition protection.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect mass flow measurement without temperature or pressure compensation\u003c\/li\u003e\n\u003cli\u003eSolid-state sensor without membrane, resists clogging and pressure shock\u003c\/li\u003e\n\u003cli\u003eWithstands condensation, humidity 0 … 100 % RH\u003c\/li\u003e\n\u003cli\u003eResponse time 20 ms\u003c\/li\u003e\n\u003cli\u003eAnalogue 1 … 5 V or 4 … 20 mA, digital I²C\u003c\/li\u003e\n\u003cli\u003eThread connection G3\/8, stainless steel or aluminium\u003c\/li\u003e\n\u003cli\u003eShock resistant up to 100 g\u003c\/li\u003e\n\u003cli\u003eDisplay module optional\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453627736390,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKJ_produkt.webp?v=1790331873"},{"product_id":"qgkk-thermischer-gasdurchflusssensor-led-anzeige","title":"QGKK thermal gas flow sensor, LED display","description":"\u003cp\u003eThe \u003cstrong\u003eQGKK\u003c\/strong\u003e is a thermal flow sensor for gas with a four-digit LED display that turns by 180° and a PNP or NPN switch output. It is particularly suited to dry air and nitrogen at flows from 5 to 2000 L\/min, also under vacuum down to -0.09 MPa.\u003c\/p\u003e\n\u003cp\u003eThermal mass flow measurement, the gas stream carries heat away from the heated sensor, one flow direction. Seven sizes \u003cstrong\u003e5, 10, 50, 100, 200, 1000 and 2000 L\/min\u003c\/strong\u003e. Display and analogue accuracy \u003cstrong\u003e± 3 % F.S. ± 1 digit\u003c\/strong\u003e, repeatability ± 3 % F.S. ± 1 digit. Response time ≤ 100 ms on the analogue output, 800 ms on the switch, selectable 50 … 1500 ms. Outputs: \u003cstrong\u003eswitch output PNP or NPN\u003c\/strong\u003e, short-circuit protected, with hysteresis, window and pulse modes up to 150 Hz, plus \u003cstrong\u003e1 … 5 V or 4 … 20 mA\u003c\/strong\u003e, alternatively \u003cstrong\u003eRS485\u003c\/strong\u003e. Supply \u003cstrong\u003e12 … 24 V DC ± 10 %\u003c\/strong\u003e, ≤ 50 mA without load. Connection via four-pin plug, cable Ø 4 mm.\u003c\/p\u003e\n\u003cp\u003eProcess connection push-in Ø 6 or Ø 8 mm, Rc1\/8, G1\/8, Rc1\/4, G1\/4, Rc1\/2, G1\/2, Rc3\/4 or G3\/4 by size. Working pressure -0.09 … 0.8 MPa, pressure resistance 1 MPa. Medium and ambient temperature 0 … +50 °C, humidity 35 … 85 % RH without dew. Protection grade IP40. Materials of body, valve and bracket are not stated. The EMC standards IEC 61000-6-2 and IEC 61000-6-4 are named; a declaration of conformity is not documented in the datasheet. Before sizing, note: the parameter table gives 12 … 24 V DC, all three wiring diagrams 12 … 30 V DC. A footnote on RS485 is missing from the datasheet, its content is unknown.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFour-digit LED display, turns by 180°\u003c\/li\u003e\n\u003cli\u003eFor pressure and vacuum, -0.09 … 0.8 MPa\u003c\/li\u003e\n\u003cli\u003eSeven sizes from 5 to 2000 L\/min\u003c\/li\u003e\n\u003cli\u003ePush-in fitting Ø 6 or Ø 8 mm or thread\u003c\/li\u003e\n\u003cli\u003eSwitch output PNP or NPN, short-circuit protected\u003c\/li\u003e\n\u003cli\u003eAnalogue 1 … 5 V or 4 … 20 mA, alternatively RS485\u003c\/li\u003e\n\u003cli\u003eSwitch response selectable from 50 to 1500 ms\u003c\/li\u003e\n\u003cli\u003eEMC to IEC 61000-6-2 and IEC 61000-6-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453627769158,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKK_produkt.webp?v=1790331873"},{"product_id":"qgkl-thermischer-massedurchflussmesser-edelstahl","title":"QGKL thermal gas mass flowmeter, stainless steel","description":"\u003cp\u003eThe \u003cstrong\u003eQGKL\u003c\/strong\u003e is a thermal mass flowmeter for gas in stainless steel with colour LCD and thread connection for nominal sizes DN15 … DN50. It is particularly suited to nitrogen and air, oxygen or hydrogen, as the datasheet gives a separate flow range for each of these gases.\u003c\/p\u003e\n\u003cp\u003eThermal diffusion principle with a heated and an unheated resistance thermometer. Flow range \u003cstrong\u003e5 … 705 m³\/h\u003c\/strong\u003e by size and gas, for oxygen about half, for hydrogen less than a tenth of the air range. Dead band ≤ 0.1 m\/s. Accuracy \u003cstrong\u003e≤ 1.5 %\u003c\/strong\u003e, no reference stated, response time 1 s, adjustable. Outputs by version: \u003cstrong\u003etwo switch outputs\u003c\/strong\u003e, PNP, NPN on request, with linear pulse 100 Hz, plus \u003cstrong\u003e4 … 20 mA or 1 … 5 V\u003c\/strong\u003e, alternatively \u003cstrong\u003eRS485\u003c\/strong\u003e. Supply \u003cstrong\u003e18 … 30 V DC\u003c\/strong\u003e. Connection via M12 plug, colour LCD on the device.\u003c\/p\u003e\n\u003cp\u003eBody of stainless steel 304, stainless steel 316 as an option and intended for hydrogen, display housing of engineering plastic. Process connection G1\/2 … G2 as external or internal thread, working pressure ≤ 2.5 MPa with external thread and ≤ 4.0 MPa with internal thread. Medium temperature -20 … +80 °C, protection grade IP65. Explosion protection is not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: the technical data give 18 … 30 V DC, both wiring diagrams 12 … 30 V DC. The velocity of up to 100 m\/s does not match the range table in m³\/h; the table applies. There is no moulded cable socket for the four-core RS485 version.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSeparate ranges for nitrogen and air, oxygen and hydrogen\u003c\/li\u003e\n\u003cli\u003eStainless steel 304, optionally 316\u003c\/li\u003e\n\u003cli\u003eUp to 4.0 MPa with internal thread\u003c\/li\u003e\n\u003cli\u003eProtection grade IP65\u003c\/li\u003e\n\u003cli\u003eColour LCD with flow, velocity and total\u003c\/li\u003e\n\u003cli\u003eTwo switch outputs plus analogue output or RS485\u003c\/li\u003e\n\u003cli\u003eDead band ≤ 0.1 m\/s\u003c\/li\u003e\n\u003cli\u003eNominal sizes DN15 … DN50, thread G1\/2 … G2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453627801926,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKL_produkt.webp?v=1790331873"},{"product_id":"qgkm-messumformer-fur-luftgeschwindigkeit","title":"QGKM air velocity transmitter","description":"\u003cp\u003eThe \u003cstrong\u003eQGKM\u003c\/strong\u003e is an air velocity transmitter with probe; it measures a flow velocity in m\/s, not a flow. It is particularly suited to measuring air velocity, for example in ducts; a volume flow additionally needs the duct cross-section and a profile factor, which the datasheet does not give.\u003c\/p\u003e\n\u003cp\u003ePer datasheet heat dissipation or pitot tube, both principles are named in one sentence. Velocity range \u003cstrong\u003e1, 2, 5, 10, 20, 30, 40 or 50 m\/s\u003c\/strong\u003e. Accuracy \u003cstrong\u003e± 0.2 m\/s + 3 % of reading\u003c\/strong\u003e, resolution 0.05 m\/s, digital linearisation and temperature compensation. Output \u003cstrong\u003e0 … 10 V or 4 … 20 mA\u003c\/strong\u003e, 0 … 5 V and RS485 as a special. Supply \u003cstrong\u003e13 … 24 V AC or DC\u003c\/strong\u003e, 50 Hz. Connection via three screw terminals for 1.5 mm². Probe length \u003cstrong\u003e220 mm\u003c\/strong\u003e standard.\u003c\/p\u003e\n\u003cp\u003eHousing material not stated, described only as high-temperature and corrosion resistant. Probe length 220 mm, below 1500 mm to order, up to 5000 mm as a special length. Ambient temperature -5 … +70 °C, humidity 0 … 90 % RH without condensation. Protection grade, dimensions, mounting, display and wiring diagram are not documented. A declaration of conformity is not documented in the datasheet. Before sizing, note: which measuring principle the device uses, heat dissipation or pitot tube, is not stated. The order code contains only the range, no field for output, probe length or connection. The supply is given as alternating and direct voltage in one entry.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEight ranges from 1 to 50 m\/s\u003c\/li\u003e\n\u003cli\u003eAccuracy ± 0.2 m\/s + 3 % of reading\u003c\/li\u003e\n\u003cli\u003eResolution 0.05 m\/s\u003c\/li\u003e\n\u003cli\u003eOutput 0 … 10 V or 4 … 20 mA\u003c\/li\u003e\n\u003cli\u003eDigital linearisation and temperature compensation\u003c\/li\u003e\n\u003cli\u003eProbe 220 mm standard, special lengths up to 5000 mm\u003c\/li\u003e\n\u003cli\u003eSupply 13 … 24 V AC or DC\u003c\/li\u003e\n\u003cli\u003eCable length up to 300 m with 1.5 mm²\u003c\/li\u003e\n\u003cli\u003eAmbient temperature -5 … +70 °C\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453631963462,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKM_produkt.webp?v=1790331873"},{"product_id":"qgkn-thermischer-gasdurchflusssensor-farbdisplay-ip65","title":"QGKN thermal gas flow sensor, colour display, IP65","description":"\u003cp\u003eThe \u003cstrong\u003eQGKN\u003c\/strong\u003e is a thermal flow sensor for gas with a colour display that turns by 180°, protection grade IP65 and M8 × 1 plug connection. It is particularly suited to dry air and nitrogen at flows from 5 to 6000 L\/min where protection grade IP65 is required.\u003c\/p\u003e\n\u003cp\u003eThermal mass flow measurement, the gas stream carries heat away from the heated sensor, one flow direction. Five sizes \u003cstrong\u003e5 … 500, 10 … 1000, 20 … 2000, 30 … 3000 and 60 … 6000 L\/min\u003c\/strong\u003e. Display accuracy \u003cstrong\u003e± 3 % F.S. ± 1 digit\u003c\/strong\u003e, analogue accuracy ± 5 % F.S., repeatability \u003cstrong\u003e± 1 % F.S. ± 1 digit\u003c\/strong\u003e. Response time ≤ 100 ms on the analogue output. Outputs by version: \u003cstrong\u003etwo switch outputs\u003c\/strong\u003e, PNP, NPN on request, short-circuit protected, cumulative pulse, \u003cstrong\u003e4 … 20 mA or 1 … 5 V\u003c\/strong\u003e, alternatively \u003cstrong\u003eRS485\u003c\/strong\u003e. Supply \u003cstrong\u003e12 … 24 V DC ± 10 %\u003c\/strong\u003e, ≤ 50 mA. Connection \u003cstrong\u003eM8 × 1\u003c\/strong\u003e, four-pin.\u003c\/p\u003e\n\u003cp\u003ePlastic housing, process connection Rc1\/2, G1\/2, G3\/4, G1 or G1-1\/2 by size. Working pressure 0 … 1.0 MPa, pressure resistance 1.5 MPa. Medium and ambient temperature 0 … +50 °C without dew or freezing. Protection grade IP65. The EMC standards IEC 61000-6-2 and IEC 61000-6-4 are named; a declaration of conformity is not documented in the datasheet. Before sizing, note: IO-Link appears only in the order code and the wiring tables, no IO-Link version and no IODD file are documented. The parameter table gives 12 … 24 V DC, the wiring diagram 18 … 28 V DC. The order code distinguishes only G and Rc threads, the thread size has to be stated with the order.\u003c\/p\u003e\n\u003ch3\u003eAdvantages at a glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProtection grade IP65\u003c\/li\u003e\n\u003cli\u003eColour display, turns by 180°\u003c\/li\u003e\n\u003cli\u003eFive sizes from 5 to 6000 L\/min\u003c\/li\u003e\n\u003cli\u003eRepeatability ± 1 % F.S. ± 1 digit\u003c\/li\u003e\n\u003cli\u003eTwo switch outputs with window and cumulative modes\u003c\/li\u003e\n\u003cli\u003eAnalogue 1 … 5 V or 4 … 20 mA, alternatively RS485\u003c\/li\u003e\n\u003cli\u003eCumulative pulse 5 … 60 L per pulse\u003c\/li\u003e\n\u003cli\u003eM8 × 1 plug connection, four-pin\u003c\/li\u003e\n\u003cli\u003eEMC to IEC 61000-6-2 and IEC 61000-6-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"octogon GmbH","offers":[{"title":"Default Title","offer_id":57453631996230,"sku":null,"price":0.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/5558\/6374\/files\/QGKN_produkt.webp?v=1790331873"}],"url":"https:\/\/octogon.org\/en\/collections\/flow-gas-qg.oembed","provider":"octogon GmbH","version":"1.0","type":"link"}