Home / Products / Pressure / Single Pressure Single Pressure Dwyer has a wide offering of Gages / Gauges, Transmitters, Switches, Data Loggers, and Monitors for Pressure, perfect for contractors, industrial and OEM applications. Gages - Dial Dial indicators for single pressure. Gages - Digital Digital indicators for single pressure. Switches Sensors with an electrical contact output at a specific pressure. Transmitters Sensors with an electrical transmission output for remote indication of pressure.