Omega EngineeringLimit Controllers Power supplies for stepper drives, sensors, transducers, strain gages, and general purpose use. Linear regulated and switching supplies, adjustable voltages and fixed voltages.1/16 DIN Universal Process Limit Controller with Illuminated KeysTemperature Limit Controller with Audible Buzzer and 15 Amp RelayHigh Limit Analog Temperature Controller with DIN Rail Mounting1/32, 1/16, and 1/8 DIN Temperature and Process Limit Controller