Thank you for purchasing the Smart Wireless Differential Gas Pressure Sensor. We pride ourselves on producing high quality products that meet with the demands of the busy classroom environment. If you have any problems using this sensor, please read this documentation in full before contacting the Data Harvest support team. 

The Smart Wireless Differential Gas Pressure Sensor is USB and Bluetooth compatible. Using Bluetooth, a sensor can connect to mobile devices, tablets, laptops and desktops.   

The Differential Gas Pressure Sensor has two measurement ports, and gives an output relative to the difference in pressure between the two ports. If one port is left open, the measurement will be relative to atmospheric value. Port P1 returns measurements with the vector of (+) and P2 returns measurements with the vector of (-). The total pressure range is -25 to +25 kPascals (kPa).  

The narrow range of pressure gives an increased resolution and sensitivity, making this an ideal sensor for very accurate small changes in pressure.  

The sensing element of the Gas Pressure sensor is piezoresistive: when a stress or strain is applied to the sensor it changes the resistance to the flow of current. The change in resistance is proportional to the stress, and the stress is created by the pressure acting on the sensor. The sensor’s electronics have temperature compensation to minimise the effect of ambient temperature changes to the sensor and electronics.   

The connector on the Pressure sensor is a female Luer lock (screw) type open-flow style. If a shut off is required a tap will need to be fitted. Data Harvest have a kit of valves, adapters, tubing etc - Gas Pressure Accessory Kit (1149)  

The female hub has a half turn lock into threads on a male Luer fitting. Luer lock couplings are a standardised system for making leak-free connections between two fittings e.g. female to male fitting. The female connector on the sensor is made for nylon and will become slack with repeated use and overtightening. We recommend the use of one of the male connectors supplied, and length of tubing to take the use away from the connector to a user replaceable connection.