ACE Instruments offers Mains Operated LED Indicator with External Transmitter. ACE Instruments offers products for various industrial process control instrumentation like pressure, temperature, relative humidity, etc. The Mains Operated LED Indicator with External Transmitter comes in 96x96x110 mm and 96x48x110 mm size. It incorporates 3 ½ Digit or 4 ½ Red L.E.D. With 0.1 mm or 1 mm W/C resolution. It also includes 2 Wire Transmitter Sensor with Stainless Steel Hose Nipple Connection.