How are the Gefran Humidity transmitters codified?
GEFRAN Humidity transmitters are differentiated at first by their power supply (2 or 4 wire) and by their application (wall mounting, distant or remote cable). The transmitters series T23X are supplied by a stabilized DC voltage of 9 to 33V. They are connected using 2 wire mounting with a measurement resistor (known as “shunt”) of nominal value 100 W , maximum 450 W The nominal resistor value to be applied, which depends on the input voltage, can be calculated with the relationship: The transmitters series T24X are equipped with a power transformer which is configurable by internal switches. Therefore the device can be supplied (connection 4 wires) under several AC voltages (24, 115, 230V). The last X of the nomenclature represents the configuration of the transmitter casing: • Wall mounting l: The transmitter is located in the same ambiance as the measured environment. • Duct mounting (or “wall crossing”): a flange separates the sensitive element from the transmitter, generally sensor
