1 Proximity switch: detection distance, ambient temperature, output signal, installation mode, power supply voltage, connection (2 or 3 lines) cable length, shell material 2 hot metal detector: Target temperature, target size, measured distance, target speed, ambient temperature, thermal emissivity of target material, housing material, viewing Angle, response temperature, supply voltage, output signal, options (air connection, temperature adjustable, function control input, connection type (cable, plug)), object size. 3 Infrared pyrometer: application point (metal, glass or flame), measuring temperature range, output signal, measuring point spot, installation distance, wavelength range, thermal emissivity, distance ratio.