Apollo Lunar Module control panel indicator, measuring 1.75 x 4 x 5, bearing a Honeywell label on the reverse, reading, "Indicator-Servometric, Mfr Part No. JG915A5, Series 1, Serial No. B-1," with date stamp above: "Mfd. Jan. 1968." The meter derives from the Reaction Control System and measures "PSIA" (Pounds Per Square Inch Absolute) pressure readings for the Apollo Lunar Module. In fine condition. The Reaction Control System monitored and configured the four sets of small 'quad' jet clusters (sixteen jets total) mounted on each corner of the ascent stage to provide precise attitude control. Each jet put out about 100 lbs. of thrust in either a pulsed (short bursts) or continuous mode.
Terms and abbreviations used in our descriptions.