A 24V power supply for use with most 4-20mA sensors. It is required when connecting the humidity transmitter to any Sensaphone that does NOT provide external 24V DC power. The Sensaphone SCADA 3000 and Express II are the only units that supply their own power.
24VDC Power Supply w/ Battery Backup
Power supply with battery backup
4-20mA transducers require power to operate. Some Sensaphone products provide 24VDC power specifically for this purpose. When using a 4-20mA transducer with a model that does not, an external power supply is required. This 4-20mA Power Supply provides up to 8 hours of battery backup if main power fails.