Thank you for purchasing the Breathing Rate Belt. 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 Breathing Rate Belt is used with either the Wireless Differential Gas Pressure Sensor, or the Smart Q Differential Gas Pressure Sensor (10 kPa range) to measure breathing rate. 

The Breathing Rate Belt is a wide nylon belt that can be wrapped around a person’s abdomen or chest region. 

Fitted inside the Belt (positioned under the Data Harvest label) is an inflatable air bladder, which is moulded to two rubber tubes. One of these tubes finishes with a hand pump bulb that is used to inflate the air bladder. The other tube is used attached to the Differential Gas Pressure Sensor to monitor the change in pressure as the test subjects chest expands and contracts during breathing.

The Differential Gas Pressure Sensors have two ports to give an output relative to the difference of pressure between the two ports. The second port is left open to atmosphere so that pressure will be measured relative to atmospheric pressure.