YJJ NAP-21A N21A Thermal Conductive CO2 Gas Sensor 2-100%VOL Detecting Module

Product Description:

YJJ NAP-21A  N21A Thermal Conductive CO2 Gas Sensor 2-100%VOL Detecting Module

Features:

I. Product Introduction

NAP-21A is a thermal conduction principle CO₂ sensor that detects gases based on the difference in gas thermal conductivity. It can measure high-concentration CO₂ ranging from 2% to 100% VOL, and can operate normally even in an oxygen-free environment. It is suitable for monitoring in sealed chambers, incubators, and high-concentration gas tanks. It provides an analog voltage output with excellent linearity, and can also detect hydrogen, methane, propane, and inert gases.

II. Complete Technical Specifications

Detection Principle: Thermal Conduction (Gas Thermal Conductivity Temperature Difference Detection)

Target Detected Gas: CO₂, compatible with hydrogen, alkanes, and inert gases

Measurement Range: 2% - 100% VOL High Concentration CO₂

Power Supply: DC/AC 1.8 ± 0.18V (50 - 60Hz AC can also drive)

Working Power Consumption Current: 120 - 130mA @ 1.8V Supply

Zero Point Output: 0 ± 20mV

Gas Sensitivity: 0.2 mV / 1% - CO₂; 10% CO₂ Output 1.2 - 2.0mV

T90 Response Time: ≤ 10s

Single Day Repeatability Precision: Zero Point Drift ± 0.5mV

Long-Term Drift: Annual Zero Point Drift ≤ ± 2mV; Monthly Sensitivity Drift ≤ ± 2mV

Operating Temperature and Humidity: -10℃ ~ +50℃; RH < 95%, no condensation allowed

Storage Conditions: -30℃ ~ +70℃, RH < 99%, no condensation

Design Service Life: ≥ 5 Years (Civilian and Commercial Use)

Recommended Idle Storage Period: Within 6 Months

Output Type: Analog Voltage Signal Output

III. Core Product Advantages

Suitable for oxygen-free sealed environments, unaffected by oxygen deficiency, different from electrochemical sensors

0 - 100% Full Range Linear Analog Output, high-concentration CO₂ detection

Can also detect hydrogen, propane, isobutane, methane, and inert gases

Low long-term drift of zero point and sensitivity, excellent stability in sealed environments

Metal probe housing, small size, convenient for integration into various detection devices

Note: Sensor output is affected by temperature and humidity, circuit board needs to add temperature and humidity compensation circuit

IV. Industry Applicable Uses

CO₂ concentration monitoring in cell incubators, constant temperature incubators sealed chambers

High-concentration CO₂ monitoring in greenhouse sheds, controlled atmosphere refrigerated cold storage, fruit and vegetable storage warehouses

Inert gas, high-purity gas detection in storage tanks, sealed chambers, underground, storage tanks, and inert gases

Industrial high-concentration CO₂ alarm equipment, gas analyzers

Air monitoring in grain storage, refrigerated transport vehicle boxes, laboratory sealed containers

Specifications: