4
JRG0J821M05001000120000B is a string of numbers found on a Johnson Controls PENN pressure transducer. This transducer is used for measuring pressure in HVAC systems, including air and fluid pressure. This specific part number indicates a 0-100 psi range, 1/4" male NPT connection, Rear Mount connection, dual scale, 12 psi span, 4-20 mA output, ceramic chip sensor, and a maximum temperature of 212°F.