Prosense PQD – 7231 Gas Detectors (Freon, 0‐2000ppm, Semiconductor)

Sensing Element: Semiconductor

Gas: Freon

Measuring Range: 0‐2000ppm

Output Signal: 4–20mA analog and RS485 Modbus RTU; optional: HART and relay outputs

Sensor Warm-up Time: 60 seconds

Response Time (T90): < 30 seconds

Accuracy: ±1%

Operating Temperature: -40°C ~ +70°C

Humidity: 0 ~ 100% RH (non-condensing)

Input Voltage: Minimum: 10 VDC; Maximum: 32 VDC; Nominal: 24 VDC

Display: 128 × 64 graphical OLED; 5 LED indicators for device status

Event Logging: Stores up to 250 events including alarms, faults, and maintenance records

Power Consumption: Max. 4W

Optional Relay Outputs: 2 alarm relays (NO/NC adjustable); 1 fault relay (NO)

Rated current: 1.25A / 30VDC

Cable Entry: 1/2” NPT – 3/4” NPT – M20

Ingress Protection: IP65 / IP66; optional IP66 for sensor head

Junction Box Material: Epoxy painted die-cast aluminium / 316 stainless steel

Sensor Head Material: 316L stainless steel

Dimensions / Weight: 196.96 × 145.99 × 112 mm / 2100 g

Hazardous Area Classification: Zone 1 – Zone 2 – Zone 21 – Zone 22

Datasheet