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location：Home>Products>Road Weather Information System>Light Transmittance Meter>Tunnel visibility monitor
Tunnel visibility monitor
Model：FT-SGT1
Brand：fengtu
Tunnel visibility monitor is an efficient and portable device used to measure road visibility and smoke concentration in tunnels.
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1.Tunnel visibility monitor product introduction
Tunnel visibility monitor is an efficient and portable device used to measure road visibility and smoke concentration in tunnels.Tunnel visibility monitor does not require installation and debugging. It can be tested after powering on. The LCD screen displays the test data in real time. Considering the harsh natural environment in the tunnel, it is not convenient to connect to a laptop to store data. The instrument has its own internal memory, which can automatically save the test data. After the test is completed, the instrument is brought back to the laboratory and connected to the computer. The light transmittance display software can automatically import the data saved in the internal memory of the instrument into the computer and save it in EXCEL format for customers to review and use.
2. Main uses of tunnel visibility monitor
Atmospheric light transmittance under various atmospheric environments
Visibility values of highways under various atmospheric conditions
Acceptance test values for VI and CO values in tunnels
Temperature and humidity test values in the tunnel environment
3. Technical parameters of Tunnel visibility monitor
| Test Range | Light transmittance (T) | 0-100% |
| Visibility (VI) | 1-5000 m | |
| Smoke density (K) | 0-35*10－31/m | |
| CO concentration (CO) | 0-300 ppm | |
| Ambient temperature | -40℃－+80℃ | |
| Ambient humidity | 0-100% | |
| Status display | 128*64 dot matrix LCD screen, digital and character display | |
| Test Principle | Light transmission method, digital probe, electrochemical probe | |
| Test error: | ±2% light transmittance (full scale) | |
| Ambient temperature | -30～70 degrees Celsius | |
| Ambient humidity | 0～100%RH | |
| Communication interface | RS232/RS485/USB | |
| Supply voltage | AC 220V power adapter (with internal rechargeable lithium battery, can work continuously for more than 10 hours without external power supply) | |
| Data storage | Can store 70 hours of continuous test data | |
| Detection cycle | 2s (can be customized according to customer requirements) | |
| Storage cycle | 10s (internal storage) | |
| Machine weight | 16KG (including instrument, instrument case, theodolite bracket) | |
Address:https://www.fengtutec.com/Light-Transmittance-Meter/Tunnel-visibility-monitor.html
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