MS Series Pressure Monitoring Device Merit Sensor MS Series Pressure Monitoring Device is a surface-mountable device suitable for low to medium pressure applications. The MS Series incorporates a proprietary Sentium® technology to provide a best-in-class operating temperature range of -40ºC to 85ºC and superior stability. The device has a range of 15 to 500psi (1 to 34.5 bar, 103 to 3,447 KPa) and offers flexibility, sensitivity, resistance, bridge, and constraint.