Overview
The TunnelTech 700 Air Quality Monitor, is an essential part of any road or rail tunnel safety system. Firstly, it monitors the atmosphere within the tunnel and ensures that the tunnel ventilation system provides sufficient clean air to protect tunnel users health and for drivers to clearly see the road ahead.
The TunnelTech 701 analyser electrochemical cell technology to determine CO, NO & NO2 concentrations and optical attenuation to monitor Visibility levels.
As there are no moving parts, reliability levels are very high and maintenance requirements are low. The sight tubes have been designed to ensure that airborne dust and contaminants do not reach the optical windows and cause drift
Features & Benefits
- Measure CO, NO, NO2 & Visibility in one compact sensor.
- Advanced electrochemical cell technology.
- Integrated display and keypad, no external computer required.
- Class leading NO2 measurement.
- Minimal maintenance requirements.
- Easy to calibrate.
Product Specification
| Gas Species | Single or multi-gas measurements available: CO, NO2, NO & Vis |
| Measuring Units | ppm for CO & NO, PPb for NO2, m-1 or m for visibility, |
| Calibration | Automatic zero calibration – manual span check |
| Measurement Technique | Electrochemical Cell, LED Transmissivity for Visibility |
| Measurement range (typical) | CO : 0 – 300ppm , NO : 0 – 30ppm , NO2 : 0 – 5/10ppm, Vis: 0 – 0.015 m-1 |
| Construction | Corrosion resistant epoxy coated aluminum housing sealed to IP66 |
| Serial Data | Bi-directional RS485 Modbus Protocol |
| Display | 32 Character alpha-numeric back-lit LCD |
| Power Supply | 24V DC, 30 VA from separate power supply |
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