Loop power supply
Microflex’s Field Tools Loop Power Supply is a filtered 24 V, 30 mA power source that fits 4 to 20 mA loop transmitters and is designed for loop transmitter field calibrations and testing. A 250 Ohm loop resistor is included internally that reduces external connections. The Loop Power Supply has a long battery life, starting at 6 hr at 12 mA load; the battery can be also replaced with AAA alkaline batteries. The unit is supplemented with an LED status indicator and is protected by a plastic enclosure.