EN-550 Nitrogen analyzerDetailed product description：

The EN-550 nitrogen analyzer uses a fully sealed fuel pool oxygen sensor, which is currently one of the most advanced oxygen measurement methods internationally. The fuel pool oxygen sensor is composed of highly active oxygen electrodes and lead electrodes, immersed in a solution of KOH. At the cathode, oxygen is reduced to hydroxide ions, while at the anode, lead is oxidized. The KOH solution is separated from the outside by a polymer film, and the sample gas does not directly enter the sensor, so the solution and lead electrode do not need to be cleaned or replaced regularly. The oxygen molecules in the sample gas diffuse into the oxygen electrode through a polymer film for electrochemical reaction. The current generated in the electrochemical reaction is determined by the number of oxygen molecules diffusing into the oxygen electrode, and the diffusion rate of oxygen is proportional to the oxygen content in the sample gas. Therefore, the output signal size of the sensor is only related to the oxygen content in the sample gas, and is independent of the total amount of gas passing through the sensor. Through the connection of external circuits, the charge transfer in the reaction, that is, the magnitude of the current, is directly proportional to the oxygen participating in the reaction.

The EN-550 nitrogen analyzer uses this method for oxygen measurement, which is not affected by reducing gases in the measured gas and eliminates many sample gas processing systems. It is faster than the old-fashioned "gold mesh lead" primary battery for oxygen measurement, without the need for a long start-up blow off process. The "gold mesh lead" primary battery sample gas directly enters the solution, resulting in a large amount of instrument maintenance, while the fuel cell method sample gas does not directly enter the solution, and the sensor can work very stably and reliably for a long time. In fact, fuel cell oxygen sensors are completely maintenance free. The EN-500 micro oxygen analyzer uses a fuel based oxygen sensor to measure oxygen, with fast instrument response and low maintenance.

Key Features:
The instrument adopts a new fuel cell oxygen detector
Equipped with two alarm contact outputs, capable of setting upper and lower limit alarm points separately
Online calibration of available air
Has two displays of N2 or O2
Featuring a four digit display

Main technical indicators:
Measurement range: 98-100%, 95-100%, 90-100%, 80-100%, 75-100% N2
0～2、0～5、0～10、0～20、0～25%O2
Resolution: ± 0.01% N2 or ± 0.01% O2
Basic error: ± 0.1% N2 or ± 0.1% O2
Response time: T 90 ≤ 20 seconds
Output signal: 4-20mA
Power supply: 220VAC ± 10%, 50HZ ± 1HZ
Environmental temperature: 0-40 ℃
Sample gas flow rate: 200-800 milliliters per minute
Inlet temperature: 0-40 ℃
Alarm relay switch contact capacity: 265VAC/1A
Dimensions: 96 × 96 × 130 mm
Hole size: 90 × 90mm
Instrument weight: 0.5kg