الوصف

QB***0N/T is a Wall-mounted H2S hydrogen sulfide gas detector, with ***0 mA or RS**5 ModBus RTU output proportional to the ethylene gas leakage concentration with original imported electro-chemical sensor. It monitors ethylene gas leakage by natural diffusion. It is flexible, durable, accuracy, stable and etc. and it can be directly connected with DCS systems or Central unit. With relay output, once the ethylene gas concentration exceed the preset alarm point(threshold) it will start the acoustic-optical alarm on the central unit and drive the external equipment like exhaust fans.It has been widely used in petrol, chemistry, metallurgy, artifice, gas transportation, biological medicine and water procession etc.

Characteristics:

• ***0mA analog output(3+ channel) for direct communication to DCS system, RS**5 ModBus output for central unit
• Relay output for connecting external device
• LCD display screen(LED display screen optional)
• Sensor module(block) design on -spot replacement s and automatically distinguish sensor fault and current display fault simultaneously.
• Password verification for repeat operation, avoid fault operations.
•  **0~**0°C following compensation for accurate detecting.
•  Second grade visual alarms on-site and Relay(connected with audible/visual alarms or drive exhaust device).
• User-selectable alarm setpoint(s).

Note: QB***0N is with the digital display screen but QB***0T is without the digital display screen. The visual and audible alarm is optional.

1. Sensor type: original imported electro-chemical sensor for H2S gas 

2. Range: ****0ppm

3. The low alarm suggest value: *0ppm. High alarm value suggested: *0ppm.

4. Resolution: 0.1ppm Accuracy:<= + 3% F.S

5. Response time:T*0<*0s.

6. Working current:≤*0 Ma

7. Output signal: 4 to *0mA standard signal(RS**5 output optional)

8. Power supply to the detector terminals: *6~*0V DC.

9. Ambient Parameter: Temperature:- *0°C~**0°C Humidity: < *0%(without condensating)

*0. Type of cable: 3 or 4 active wires screened between detector and centralized unit. 3×1.5mm2 for ***0mA signal OR 4*1.5mm2 for RS**5 signal, external diameter >=*0mm

*1. Transmition Distance:<=***0meter

*2. Mounting Screw thread: G1/2.

*3. Weight: ***0g.

*4. Anti-explosion Class: Ex d IICT6Gb

*5. Protection Class:IP*6.