With over 25 years’ experience in the design and manufacture of gas and particulate sensors, we have established a reputation as a reliable source for a wide range of gas sensor technologies.
At Alphasense, we supply high-quality Oxygen, CO2, toxic and flammable gas sensors to many of the world’s leading industrial OEMs.
If you manufacture portable or fixed industrial gas detection monitors, stack gas analysers or environmental monitoring instruments, we have the solution for your needs.
Alphasense, established supplier of electrochemical gas sensors, also offers 4-20 transmitter boards to measure toxic gas, carbon dioxide and oxygen concentrations for use in fixed installation systems.
The 4-20mA digital boards can be used with all Alphasense toxic gas sensors whilst the analogue boards are suitable for most Alphasense oxygen sensors and unbiased B series toxic gas sensors. Both boards have the same dimensions, pillar locations, 2-wire current loop connectors and 4-20 mA output.
The 4-20 mA current is linear from 0 ppm (4 mA) to your specified full scale concentration (20 mA). The voltage measured across a resistor in series with the supply current (typically 100 ohms load resistor) will give an accurate measurement of gas concentration.
The boards supplied with sensors are pre-calibrated to customer requirements. The 4-20 mA output signal provides an equivalent performance to that shown in the individual sensor Technical Data Sheets, but scaled to your specific range requirements.
Alphasense NDIR transmitter boards offer both 4-20 mA and USB outputs, scaled to one of four ranges. Concentration range can be recalibrated via PC/ USB port using our proprietary software.
To allow OEMs to distinguish their product from other offerings, the sensor-to-gas aperture design is left for the OEM to execute.
Our team can help you with any product information, quotes, or any general questions you may have about the product.
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