Detection Principle Photoionization Detection (PID)
Measurement Range 0-1 ppm to 0-10,000 ppm (selectable ranges, e.g., 0-10/100/1000 ppm)
UV Lamp Energy Standard 10.6 eV (other options: 11.7 eV)
Accuracy ±2% of reading or ±1% of full scale (whichever is greater)
Response Time (T90) Typically < 3 seconds
Sample Method Diffusion or pumped (integrated sample pump)
Output Signals - Analog: 4-20 mA DC, isolated
- Alarms: 2+ SPDT relay outputs
Power Supply 24 V DC (18-30 V DC range)
Display Backlit LCD (concentration, status, alarms)
Enclosure Rating IP66/IP67 (dust-tight, water-resistant)
Operating Temperature -20°C to +50°C
Calibration Field-configurable with standard calibration gases
Safety Certifications ATEX, IECEx, FM (Zone 1/Division 1 hazardous areas)
The Foxboro TVA-1000 is a continuous, online toxic vapor analyzer designed to monitor trace concentrations of hazardous gases in ambient air for personnel and plant safety. It is based on Photoionization Detection (PID) technology.