Sensor receiver board AFE

industrial

Alphasense air quality sensors require low-noise electronics to optimise their performance. We have worked for many years to perfect our circuits, so you can now fake advantage of our low-noise circuits for easiest use. The family of Analogue Front End (AFE) circuits is designed for use with the A4 air quality sensors. Connect the AFE with A4 sensors fo your multiplexed ADC and you are recording air quality data immediately. Features of the AFEs include: 2-sensor, -sensor, -sensor+ +PID and 4-sensor versions are available. Ihe AFEs are analogue potentiostat circuifs With on-board power regulation and reterence volfages: there is no digital circuifry on the AFEs. Power requirement: 650uA per channel; for example, 3 sensor AFE with sensors requires only 2 mA. Although electrochemical sensors require + and power supplies, the negative supply is generated on the AFE so you need only supply 3.4 to 6.4 V(ow noise) and analogue ground. Each AFE includes a P1000 located next to the centre sensor for correct femperature compensation. PH1000 output is Im/C but the room femperafure must be sef through your software AFEs are not user-adjustable: Offset voltage for each sensor is defined in the calibration document (two offsets for each sensor: working electrode offset and auxiliary electrode oser) which you program into your software. AFE gain is preset. The calibration document also states the mV/ppb calibration for each working electrode which you program into software. Accessories include cables (specify 50 mm or 200 mm length), gassing hoods for calibration checks and mounting pilars, sealing gaskefs and hardware for easy fitting to your hardware.