Ammonia gas detector

Detection principle:

Ammonia gas detectorThe principle of action is based on measuring the thermal conductivity of the nitriding furnace atmosphere to determine the concentration of H2, which indirectly indicates the ammonia decomposition rate. The decomposition rate of NH3 can be indirectly detected by detecting the concentration of H2 in nitrogen gas with a concentration ratio of 75% H225% after the decomposition of NH3 chemical formula NH3 *. H2 concentration detection is generally carried out through the principle of thermal conductivity. Different gases have different thermal conductivities. For example, using air as a reference gas, the relative thermal conductivities of various gases at standard pressure and 0 ℃ are as follows

Air: 1.0

NH3：0.89

H2：7.15

CO：0.96

CH4：1.25

Ar：0.684

O2：1.013

CO2：0.605

N2：0.996

The thermal conductivity of a mixed gas is approximately equal to the arithmetic mean of the thermal conductivity of each component. Among them, H2 has a high thermal conductivity, so measuring the thermal conductivity of the mixed gas can determine the concentration of H2, and then calculate the ammonia decomposition rate of the furnace gas.

Product Overview:

Ammonia gas detector, is an industrial online detection instrument for hydrogen content in mixed gases developed by combining microfluidic thermal conductivity gas sensors with new microcomputer processing technology. It can be applied to non explosion proof online analysis of hydrogen content in mixed gases or non explosion proof online analysis of hydrogen content in ammonia decomposition hydrogen production in industries such as petrochemicals, metallurgy, power, air separation, and nitrogen furnace ammonia decomposition rate.

Technical Specifications:

1. Measurement range: 0.00~99.999 H2 (intermediate range can be customized)

2. Accuracy: ≤± 2% F.S

3. Repeatability: ≤± 1% F.S

4. Sample gas flow rate: 400 ± 10mL/min

5. Response time: T90 ≤ 15 seconds

6. Preheating time: ≤ 15 minutes

7. Sample gas pressure: 0.05 MPa ≤ inlet pressure ≤ 0.1 MPa. (The outlet must be at atmospheric pressure)

8. Working environment: Temperature: -5 ℃ to+45 ℃; Humidity: ≤ 90% RH (no condensation)

9. Working power supply: 220VAC ± 10%, 50Hz ± 5%

10. Dimensions: 270mm (width) x 134mm (height) x 280mm (depth)

11. Installation dimensions: 230mm (width) × 134mm (height)

12. Weight: Approximately 3kg