The United Electric H400K-456-M540 is a high-performance differential pressure switch engineered for precision monitoring in demanding HVACR and industrial process environments

allowing for rapid field servicing without disturbing the diaphragm case assembly or main piping

The self-aligning screen design ensures a consistent seal within the housing

Enhanced Safety: Consistent flame sensing prevents "No Flame Detected" errors and rapid cycling that can stress the gas valve

reducing inventory complexity for contractors

Siemens Building Technology QAE2030.010 Sensor 326010-701 The United Electric H400K-456-M540 isThe Siemens QAE2030. 010 is a field proven immersion temperature sensor designed for high accuracy monitoring in hydronic HVAC and Building Automation Systems (BAS). Engineered with a 10k Ohm Type 2 NTC thermistor, this sensor delivers a precise resistance based output signal, maintaining a calibration accuracy of 0. 4F at 77F. The unit features a durable 4 inch 300 series stainless steel probe and includes a metal thermowell to ensure rapid thermal