: Features a high-decibel alarm (typically over 85 dB).
: Remains lit when the device is properly connected to AC power. STATE (Yellow/Orange) : Flashes during the initial warm-up period. ALARM (Red) : Flashes when a gas leak is detected. Audible Alarm
: Low concentration; only the green POWER light is on. No audible alarm sounds.
: Wipe the exterior with a soft, dry cloth. Do not spray cleaning chemicals, insect sprays, or silicones directly on or near the detector, as these can damage the sensor or cause false alarms. Power Outages : Most models are strictly plug-in and do not have a battery backup . If the power goes out, the device will not function. Brj-502 Manual
Real-time LED readout shows gas concentration levels from 0 to 9, or "A" for dangerous levels.
uses a numerical scale (typically 1–9) to represent gas concentration levels : Alarm Action No alarm; green power light stays on. 1 – 2 No audible alarm; standard monitoring. 3 – 5 Low Leakage Slow "Di... Di..." sound; STATE/ALARM lights flash red. 6 – 9 High Leakage Rapid "DiDiDi..." sound; STATE/ALARM lights flash quickly. A Dangerous Leak Over 9% LEL; fastest alarm sound and light flashing. 4. Emergency Procedures If the alarm sounds (levels 3 or higher):
Perform the initial "Zero-Point" calibration. This ensures that all measurements and outputs are accurate from the first use. 4. Operating Instructions : Features a high-decibel alarm (typically over 85 dB)
The BRJ-502 uses three LED indicators— (Green), STATE (Yellow/Red), and ALARM (Red)—along with an audible alarm ( ≥85is greater than or equal to 85
High concentration; rapid, continuous whistling alarm sound. Installation Guidelines Placement depends on the type of gas you intend to detect:
: Natural Gas (Methane), Liquefied Petroleum Gas (LPG/Propane/Butane), Liquefied Natural Gas (LNG), and City Coal Gas. Power Supply : AC 100V to AC 240V, 50/60 Hz. ALARM (Red) : Flashes when a gas leak is detected
Q: What are the applications of Brj-502? A: Brj-502 has a wide range of applications across various industries, including coatings and paints, adhesives and sealants, construction, and automotive.
The Brj-502 supports Modbus RTU over RS485 (terminals A, B, GND). The manual provides a register map:
Sets system to Heat (reverse action) or Cool (direct action). Alarm 1 Value User defined Triggers auxiliary relay at designated limit. Hy Hysteresis 0.1 – 50.0 Sets the ON/OFF deadband when not using PID. LCK Parameter Lock 0000, 0001, etc. Prevents unauthorized tampering with deeper settings. How to Run Auto-Tuning (AT)
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