Supplier of testing equipment

Fixed online two-wire 4-20mA nitrogen dioxide detectorThe nitrogen dioxide gas concentration detection transmitter adopts a cast aluminum explosion-proof shell as the protective shell, and has the characteristics of small size, light weight, and easy installation. The electrochemical nitrogen dioxide gas sensor is used as the nitrogen dioxide gas concentration detection element to convert the nitrogen dioxide gas concentration content into an electrical signal. Then, the weak electrical signal is amplified by an amplifier and sent to a microprocessor for signal processing, and converted into a standard (4~20) mA current signal, which is then transmitted to the required upper computer equipment. The connection between the transmitter and the upper equipment only requires a two core cable, and the connection does not distinguish between positive and negative polarity. It superimposes the signal with the power supply, which can both supply power to the equipment and transmit signals, greatly solving the difficulty of on-site construction wiring and making equipment debugging, installation, and maintenance faster and more convenient. In addition, this transmitter has precise measurement, rapid response, long service life, stable and reliable performance, and is very suitable for monitoring the concentration of nitrogen dioxide gas in places such as petrochemicals, metallurgy, and environmental monitoring.

Fixed online two-wire 4-20mA nitrogen dioxide detector

Product Features:

1> Adopting cast aluminum explosion-proof shell

2> Compact in size, lightweight, and easy to install.

3> Built in 4-series electrochemical sensor.

4> Equipped with one click zero adjustment and one click calibration functions.

5> Output standard (4-20) mA current signal.

6> Two electrodes are connected without polarity, and the connection does not distinguish between positive and negative poles.

7> The maximum transmission distance of the standard (4-20) mA current signal is up to 1000 meters.

8> Can be equipped with various devices such as PLC, DCS system, GDS system, gas alarm controller, etc.

9> Accurate measurement, rapid response, long lifespan, stable and reliable.

10> Strong anti electromagnetic interference performance, more suitable for complex industrial environments.

Technical Specifications

1> Gas detection: nitrogen dioxide

2> Detection method: natural diffusion type

3> Measurement range: 0-20PPM

4> Response time: ≤ 60 seconds (T90)

5> Indication error: ± 3% FS

6> Sensor type: Electrochemical

7> Execution standard: JJG365-2008

8> Working mode: Fixed long-term working mode

9> Working voltage: 24V DC

10> Working current:<25ma<>

11> Output signal: (4~20) mA standard current signal

12> Material structure: Die cast aluminum explosion-proof shell

13> Dimensions: (165 * 135 * 75) mm

14> Connecting cable: Two core shielded cable, recommended cross-sectional area (2 * 0.75) mm

15> Connection distance: ≤ 1000m

16> Protection level: IP65

17> Installation method: Wall mounted

18> Explosion proof form: Explosion proof type

19> Inlet: Hexagonal compression nut

20> Interface specification: 20X1.5mm