VT
Type P12-CH4
Description： VT P12-CH4 is a new methane (CH4) 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 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 CH4 NDIR gas detection and spectral analysis.
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
-Bottom safety monitoring
-Industrial process monitoring
-Kitchen gas monitoring
◆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 | 88 | 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 F3.30 | ||||
| Parameter | Symbol | Typical Value | Unit | Remarks |
| Center wavelength | CWL | 3300±30 | nm | |
| FWHM | HPB | 160±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% |
