Gas detector

On-line toxic and harmful gas detector

Chapter one product overview

The online gas detector is used for 24-hour continuous online monitoring of gas concentration in the field, 1.7 inch high-definition color screen displays the scene concentration, exceeded the scene sound and light alarm (optional), remote signal transmission. International well-known brands of gas sensors, the main detection principles are: electrochemistry, infrared, catalytic combustion, thermal conductivity, PID photoion and other principles of gas sensors.

The on-line gas detector is suitable for detecting the gas concentration in the pipeline or confined space and atmospheric environment; Gas leaks and various background gases are nitrogen or oxygen with a high concentration of single gas purity. More than 500 kinds of detection. The durable explosion-proof shell is suitable for all kinds of dangerous places and harsh industrial environment, and is widely used in petroleum, chemical industry, metallurgy, refining, gas transmission and distribution, biochemical medicine and other industries.

Chapter Two: Product characteristics

● Concentration display unit can be freely switched

● Multiple communication methods to choose from

Can be real-time monitoring through wired or wireless remote transmission, network transmission; Three-wire system 4 ~ 20mA standard signal and standard bus RS485 (modbus-RTU) output at the same time; Optional frequency output 200-1000Hz, Hart protocol signal, 1 ~ 5V output, two-wire 4 ~ 20mA, SMS alarm, wireless transmission (2 ~ 5km or unlimited distance); Compatible with secondary instrument, data acquisition module, PLC, DCS system, can drive related equipment.

● Infrared remote control

The standard infrared remote control is equipped with one-click operation through the function key of the infrared remote control, which can realize the operation without opening the cover in dangerous situations, such as: modifying the alarm point, concentration calibration, zero calibration, noise reduction, and factory restoration.

● Rich man-machine interface

1.7 inch HD color screen, display real-time concentration, alarm status.

● High temperature gas detection (optional)

Optional high temperature and high humidity pretreatment system can detect high temperature flue gas.

● Data recovery function, in case of misoperation can select partial or full recovery

● You can set whether to display the maximum and minimum values

● A variety of alarm methods, when the alarm multi-directional three-dimensional indication alarm status

Includes: 2 sets of relay switching output, audible and visual alarm (optional), display visual alarm.

Alarm types include: concentration alarm, fault alarm.

● Multiple alarm mode Settings: low alarm, high alarm, interval alarm, weighted average alarm

● Misoperation identification function: concentration calibration misoperation is automatically identified and prevented to avoid human factors

● Zero automatic tracking, long-term use is not affected by zero drift

● Multi-stage calibration of target points to ensure measurement linearity and accuracy

● Chinese or English interface can be selected

● Wide operating temperature: -40 ~ +70℃, support temperature compensation

● Log recording

Record calibration log, maintenance log, fault record, fault resolution, sensor life expiration reminder, the next concentration calibration time reminder function.

● Intrinsic safety circuit design, explosion-proof, with two levels of lightning protection, anti-static ability. Meet the national standard, resist the impact of high strength pulse surge current. It has anti-reverse connection function. Meet EMI and EMC standards.

Chapter III technical parameters

Detection of toxic gases, oxygen, carbon dioxide, flammable and explosive gases, TVOC, etc

Applications Petroleum, chemical industry, medicine, environmental protection, gas distribution, storage, gas analysis, air treatment and other need to be fixed installation, online detection of gas concentration occasions.

Detection range 0 ~ 1, 10, 100, 1000, 5000, 50000, 100000ppm, 200 mg/l,

100%LEL, 20%, 50%, 99.999%, 100%Vol optional, other ranges can be customized.

Resolution 0.01ppm or 0.001ppm (0 ~ 10 ppm); 0.01ppm (0 ~ 100 ppm),

0.1ppm (0 ~ 1000 ppm), 1ppm (0 ~ 1000 ppm or more),

0.01 mg/L (0-200% mg/L), 0.1%LEL, 0.01%, 0.001%Vol.

Detection principle Electrochemistry, catalytic combustion, infrared, thermal conductivity, PID photoion, etc., according to the gas type,

Range, site environment and user needs.

Detection accuracy ≤ ± 3%F.S (Higher precision can be customized)

Linearity ≤ ± 2%

Repeatability ≤ ± 2%

Uncertainty ≤ ± 2%

Recovery time ≤ 30 seconds

Response time T90≤ Twenty seconds

Signal output bus RS485 (RTU), three (four) wire system 4 ~ 20mA, optional: 0 ~ 20mA,

1 ~ 5V, 0 ~ 5V, 0 ~ 10V, wireless transmission, network transmission, SMS alarm.

Working temperature: -40℃ ~ +70℃, humidity: ≤ 10 ~ 95%RH (conventional) non-condensation occasions

In the use of condensation occasions must be customized or ordered to indicate the use of the environment

Display mode Field 1.7 inch HD color screen display, optional field no display, or optional controller remote display, control, alarm

The operating voltage is 12 ~ 36VDC DC, the standard power supply for a single device is 24V, 1A or greater

Dc voltage regulated switching power supply

Power reference 24V, 2.1A switching power supply can drive 40 toxic gas detectors, or 15

Combustible, infrared gas detector

Working mode Fixed installation, online detection, diffusion measurement; Optional pipe, flow,

Pumping measurement.

Installation mode Pipe type, wall hanging type. The working pressure of the pipe type is atmospheric pressure. 30%, beyond the range of pressure treatment.

Alarm mode default 1, optional 2 passive contact (dry node) output, three-level alarm,

Alarm point can be set. On-site audible and visual alarm (optional).

Connection cable 4 to 20mA select a three-core shielded cable, RS485 select a four-core, the distance exceeds 1000 meters

Single wire diameter ≥ 1.5mm; The shield is grounded.

Protection class IP65

Explosion-proof type Flameproof type

Explosion-proof mark Exd IIC T6 Gb

Implement standard GB15322.1-2019 "Combustible Gas Detector Part 1"

1. 2010 General Requirements for Electrical Equipment for Explosive Gas Environments

Eg. 2010 "Explosive gas environment electrical equipment flameproof type “d”"

Appearance size 238× 210× 90mm(L× H× W) With lights

238× 152× 90mm(L× H× W) No lights

Weight 1.8Kg

Standard accessories manual, certificate, warranty card, outer box packing box

Options Integrated sound and light alarm, split sound and light alarm, 24V DC regulated power supply,

Accessories for computer monitoring: free PC software, RS485/RS232 converter,

Laptop without RS232 interface also need USB/RS232 conversion cable, if

A TCP/IP converter is also required for network transmission.

Wireless transmission optional function, you can wireless data transmission to mobile phones, remote monitoring center, monitoring

Monitoring equipment such as computers, using the upper computer on the computer, data analysis, storage,

Printing and other functions

Pretreatment system options: normal temperature and high humidity pretreatment system, high temperature and high humidity pretreatment system,

High temperature, high humidity and high dust pretreatment system

Installation accessories: wall mounting bracket, installation clip fixed on the pipe (four points, six points),

Pipe installation stainless steel thread weld base or flange (need to indicate the pipe or flange size, such as DN50, DN15...) Rain cover, 24VDC or 220AC sampling pump (sampling distance is 10 meters), vacuum pump (sampling distance is greater than 40 meters), 24V switching power supply, pressure reducing valve, flow meter.