Explosion proof mechanical paramagnetic oxygen analyzer

Model3750Mechanical paramagnetic oxygen content analyzerThis instrument is a pure physical measurement device based on the paramagnetic properties of oxygen. It does not require a reference gas, consumes no chemicals or electrolytes, has a maintenance free design, high accuracy, simple operation, and can measure data with ventilation. It is commonly used in industrial process control, environmental monitoring, and other fields, and is particularly suitable for high-precision, continuous online measurement of oxygen concentration (O ₂). Beijing Fangshi Yasheng--Explosion proof mechanical paramagnetic oxygen analyzer

1、 Working principle

Principle of paramagnetism: Oxygen molecules have strong paramagnetism (easily attracted by magnetic fields) and will move towards the strong magnetic field region in a magnetic field.

Dumbbell structure detection: There are two hollow glass balls (dumbbell balls) suspended in a magnetic field inside the instrument. When oxygen-containing gas enters, oxygen is attracted by the magnetic field, causing the dumbbell ball to deflect.

Photoelectric conversion: By measuring the deflection amplitude of the dumbbell ball and using photoelectric sensors to convert mechanical displacement into electrical signals, the oxygen concentration can be directly calculated.

2、 Core Features

High precision: The measurement accuracy can reach ± 0.1% O ₂, suitable for percentage 0.1-100% or high-purity oxygen (99.9% or above) detection.

Quick response: No chemical reaction required, short response time (usually<10 seconds).

Stable and durable: no consumable parts, long lifespan (over 5 years), low maintenance costs.

Strong anti-interference: only sensitive to oxygen, not affected by non paramagnetic gases such as CO ₂ and N ₂ interference.

Standard 19 inch chassis,

Explosion proof type adopts explosion-proof shell, external button adjustment, simple and convenient operation

LCD liquid crystal display,

Standard isolated 4-20mA signal output, can be directly connected to DCS

Menu style operation, fully Chinese LCD display

3、 Typical application scenarios

Industrial process control: petrochemical, smelting

Air separation equipment (oxygen purity monitoring in oxygen/nitrogen production processes).

Combustion optimization (real-time control of oxygen content in boiler and kiln flue gas).

Medical field: concentration monitoring of medical oxygen generation equipment.

Environmental safety: Safety monitoring of oxygen content in mines, enclosed spaces, or exhaust emissions.

Model3750Technical Specifications:

Test principle: Mechanical paramagnetic

Display mode:4.3inchIPSColor capacitive screen

Detection range:0.01%~5%/10%/21%/25%/50%/99.99% O2

resolving power:0.01%Accuracy: ≤±1.0%FS

Repeatability: ≤±0.1%

Stability: ≤±0.1%/7d，≤±0.2%/m

Preheating time:30min

Response time: ≤3s（T10~T90）

Output interface:4-20mAAnalog current output (load resistance less than)500Ω）0-10VAnalog voltage output (load resistance greater than)10KΩ）2Programmable relay with dry contact type alarm output, maximum contact capacity220VAC/2A 1Road fault signal output

Communication method:RS232(default) orRS485

Working power supply:AC100~240V，50/60Hz

4Explosion proof mechanical paramagnetic oxygen analyzerPrecautions for use

1. Environmental requirements:

Avoid strong vibrations or impacts (dumbbell balls are precision components).

The installation location should be kept away from high temperatures and corrosive gases.

2. Maintenance points:

Regular calibration (calibrated with standard gas every 3-6 months).

Keep the air path clean and replace the pre filter regularly.