1. Comparison of core principles

TX721-A1B Low Power Infrared Gas Sensor

GDA223-F Digital Pyroelectric Sensor

2. Differences in industrial application scenarios

✅ Typical uses of infrared sensors (NDIR)

Environmental monitoring: real-time analysis of CO₂ emissions

Mine safety: methane concentration explosion warning

Agricultural greenhouses: photosynthesis CO₂ concentration control

✅ Typical uses of pyroelectric sensors (PIR)

Security systems: human intrusion detection

Smart home: automatic lighting/air conditioning start and stop

Energy-saving equipment: automatic power off in unmanned areas

3. The five most concerned issues of users

❓Q1: Which sensor is more suitable for combustible gas detection?

→ A: Infrared sensor (NDIR) has higher accuracy, is not affected by humidity, and is suitable for quantitative analysis of gases such as methane and propane

❓Q2: Will pyroelectric sensors give false alarms?

→ A: It may be triggered by heat sources such as pets and heaters. It is recommended to choose a dual-element probe + Fresnel lens design (such as XX brand BS312 solution)

❓Q3: Why is infrared often used in industrial gas detection?

→ A: NDIR has a high accuracy of 0.1% FS and a lifespan of 10 years, far exceeding semiconductor/catalytic combustion sensors

4. Advantages of Tensensor Sensing Technology

🔥 Infrared sensor solution:

Using dual-wavelength reference technology, temperature drift error <±2%

Support Modbus RTU protocol, directly connected to PLC system

⚡ Pyroelectric sensor solution:

Military-grade anti-EMI design, false alarm rate <0.1%

Provide lens + circuit integrated module to shorten the development cycle

5.Get the free support

If you have any interests to know more of our solutions, pls feel free to contact us for free support!

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