QPS30 Series Digital Electronic Pressure Switch The QPS30 series digital pressure switch is an intelligent pressure measurement and control product that integrates pressure measurement, display, output, and control functions in a single compact unit. Technical Specifications Measurement Media Fluorinated refrigerants, air, and liquids (allowable medium temperature -20℃ to 120℃) Power Supply 16-30VDC Pressure Range 10KPa-40MPa Protection Rating IP65 Connection G1/4" male