ACE Instruments offers Differential LED Pressure Indicator. ACE Instruments offers products for various industrial process control instrumentation like pressure, temperature, relative humidity, etc. The Differential LED Pressure Indicator offers maximum 3 times Over Pressure Range and Accuracy: Better than +/-0.1 percent F.S. It works with Single Phase 230 Volts A.C. Power supply. It features Silicon Coated Sensor with S.S.316 / Brass Hose nipple connection which is applicable for Air and Gases including Corrosive Gases.