Spot-type toxic gas detector

Overview:
Toxic gas detector is a kind of fixed installed high-end gas detector used for detecting the leakage of industrial toxic gas, with design

patent and complete output, suitable for a variety of places.

Check the site gas concentration from the detector LCD, and magnetic rod can be used to complete setting for site alarm point and

coefficient modification, no need to open the cover.

The detector possesses the function of sensor drop-off fault alarm and concentration limit alarm

The detector has adopted modular structure, composed of digital processing display unit and sensor detection unit, infrared absorption

type hydrocarbon gas sensor, PID sensor, electrochemical sensor and oxygen sensor are of standard modular detecting unit. Detecting

unit is capable of plug and play at site, can be changed with each, no need to calibrate, and hot plug is possible.

Three output mode: 4～20mA standard current output, RS-485 output, alarm upper and lower limit, fault three-group relay contact output,

the alarm is open contact at normal status, constant close signal at fault status.

With two built-in decimal dial switch, the detector is convenient for setting its address, RS-485 output mode connected with bus-system

MR3000 flammable gas alarm controller, 4～20mA output mode connected with MR3000-A multiline MR3000-A flammable alarm controller.

The detector can be used alone with power supply, also can be connected with DCS, PLC and other industrial automation system as per output mode.

Main technical specification  

Detection principle: electrochemical type/infrared absorption type/ PID type  Accuracy: ±3%FS

Repeatability: 2%  Response time: T90＜20S

Temperature range: -40℃～70℃ Humidity range: 10～95%RH with no condensation

Power supply: 10～30VDC    Power: ＜1W

Output signal: 4-20mA, RS-485, relay contact output

Relay capacity: 1A/24VDC

Shell material: cast aluminum, 316 stainless steel  Interface thread: 2-G3/4

Explosion level: ExdⅡCT6   Protection level: IP66
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Cable: ≥1.5mm2 shield cable

Maximum distance between detector and mainframe: ≤1000m

Sensor service life: two years under electrochemical type and five years under infrared absorption type (related to specific service environment).

Features: 

Adopted imported sensor, high precision, good stability, good resistance to poison and interference.

Adopt wide temperature LCD for the sake of working in ambient temperature of 85℃.

Real-time Display the type, concentration, concentration unit of measure gas, and corresponding status.

Zero-point calibration to avoid measuring error caused by zero-point shift.

Equipped with gas gathering calibration cover to calibrate site gas concentration.

Two built-in decimal dial switch to complete address setting of the detector.

Apply magnetic rod to finish alarming setting, coefficient modification and other commissioning work of the detector, with no need to open the cover.

Explosion-proof design, and suitable for industrial 1 & 2 grade hazardous area.

Built-in passive switch output contact, can be connected with firefighting system, and can also realize site control.

Double G3/4 joint design, and suitable for external mounted audible & visual alarm.

Special designed installation support so as to meet the demand in different environment.

Application place:

It is applicable to the leakage detection of flammable gas and toxic gas in oil refinery, petroleum pipeline, chemical plant, coking plant, oil depot,

liquefied gas station, CNG, LNG, spirit room, spray room, drilling platform, city gas, boiler house of petrochemical industry, metallurgy industry, electrical industry.