The Manning GM-JR is a gas concentration readout and alarm unit with 20-segment calibrated LED bargraph, alarm and fault LEDs, and relay output. Alarm trip points adjustable in 5% increments via shorting bar. On power-up, a one-minute delay allows sensor stabilization.

Continuously monitors incoming 4-20mA signal; fault LED illuminates and relay trips if signal drops below 1.4mA. The alarm relay is normally energized for fail-safe operation. Available in standalone or feed-through configurations, with 4-20mA output in feed-through design. Applications include local concentration level monitoring and control capability.