VT
Type P12-CO2
Description： VT P12-CO2 is a new carbon dioxide (CO2) NDIR detector made of CMOS-MEMS
technology, which has the characteristics of high infrared response rate,
high repeatability and high reliability.
The detector is packaged in a TO-39 metal tube, with a built-in high-precision
thermistor chip, which can compensate the ambient temperature.
And it is equipped with two infrared filter windows
(the transmittance curve is shown in the figure below),
dual-channel detection, which can offset the influence of the environment on the detector,
and can be widely used in CO2 NDIR gas detection and spectroscopy.
●Other optical filters, such as: 3.30 μm transmission optical filter for CH4 detection,
can be customized according to requirements.
Features： 1.High infrared response rate, high signal-to-noise ratio
2.Dual window packaging, high reliability
3.Anti-electromagnetic interference
4.High precision thermistor including ambient temperature compensation
◆Product application
-NDIR CH4 gas detector
-Indoor air quality monitoring
-In-vehicle air quality monitoring
-Central ventilation system, HVAC
◆Product specification
| Parameter | Symbol | Typical Value | Unit | Conditions |
| Chip resistance | RTP | 84±10 | KΩ | 25℃ |
| Temperature coefficient of resistance | TCRTP | 0.02 | %/K | 25℃ |
|
Signal voltage |
Vs | 55 | μV | MET Sensor test set-up: IR source Axetris-EMIRS200,6.5 V, 4 Hz, distance 15 mm |
|
Signal voltage |
Vs | 95 | μV | |
| Response time | t | 13 | ms | |
| Equivalent Noise Voltage | VN | 37 | nV/Hz1/2 | 25℃ |
◆Spectral characteristics of optical filter
| Infrared Channel Filter1 F3.91 | ||||
| Parameter | Symbol | Typical Value | Unit | Remarks |
| Center wavelength | CWL | 3910±40 | nm | |
| FWHM | HPB | 90±20 | nm | |
| Peak transmittance | T Peak | >75 | % | |
| Cut-off area | T Peak | <1 | % | From UV to Band Pass |
| T average | <0.1 | % | ||
| Infrared Channel Filter2 F4.26 | ||||
| Parameter | Symbol | Typical Value | Unit | Remarks |
| Center wavelength | CWL | 4260±40 | nm | |
| FWHM | HPB | 180±20 | nm | |
| Peak transmittance | T Peak | >80 | % | |
| Cut-off area | T Peak | <1 | % | From UV to Band Pass |
| T average | <0.1 | % | ||
◆Maximum rated temperature
| Parameter | Typical Value | Unit |
| Operating Temp. | -40~125 | ℃ |
| Storage Temp. | -40~100 | ℃ |
◆Dimension diagram
◆ NTC R-T Table
| Resistance | 100k Ohms at 25deg. C | Resistance Tolerance | + / -3% |
| B Value | 3950K at 25/50 deg. C | B Value Tolerance | + / - 1% |
