? digital adaptive temperature control; 
 ? The temperature sensing elements using seismic anticorrosive structure; 
 ? The signal is digitized, blue LCD; 
 ? measure the output of a linear expression; 
 ? Digital temperature compensation; 
 ? Two sets of output passive contacts; 
 ? Isolated output standard signal; 
 ? Infrared remote control operation; 
 ? full Chinese menu operation (English version ordering instructions); 
 Use and range of applications 
 JNYQ-H-34Ex-type digital hydrogen analytical instruments for flameproof, can be used for continuous automatic analysis of a variety of gas mixtures of hydrogen percent concentration. Its structure is suitable for installation in complete sets of equipment, with a simple structure, small amount of maintenance and long life. Applicable to thermal power plants, chemical plants and other explosion-proof places. 
 Applications 
 A. Power plant: generator hydrogen cooling system to cool the percentage content of hydrogen in the hydrogen purity analysis and measurement of environmental; 
 Two. The hydrogen contents of the fertilizer plants: nitrogen ammonia flow of fresh gas and recycle gas. 
 Working principle 
 JNYQ-H-34Ex-type digital hydrogen analyze the working principle of the instrument is based on the thermal conductivity of the gas and determine their composition, that is determined by the measurement of the thermal conductivity of the gas mixture of hydrogen content in the mixed gas. 

 Technical parameters: 
 ◆ Detection range: 95.00 to 99.99% (range optional); 
 ◆ Accuracy: ≤ ± 2% FS; 
 ◆. Resolution: 0.01%; 
 ◆ Stability: ≤ ± 2% zero drift FS/7d; 
 Range drift ≤ ± 2% FS/7d; 
 ◆ Repeatability: ≤ ± 1%; 
 ◆ warm-up time: ≤ 30min; 
 ◆ Response Time: T90 ≤ 15S; 
 ◆ Explosion-proof grade: Exd Ⅱ CT6; 
 ◆ Output signal: 4 ~ 20mA; 
 ◆ Contact capacity: 220VAC, 1A 24VDC, 1A; 
 ◆ working environment: Temperature: -10 ℃ ~ +45 ℃; 
 Humidity: ≤ 90% RH; 
 ◆. Working power supply: 220VAC ± 10%, 50Hz ± 5%; 
 ◆. Dimensions: 440mm × 440mm × 320 mm; 
 ◆ Weight: about 38kg;