The Model T265 is the only commercially available US EPA Federal Reference Method for Ambient Ozone Monitoring according to the latest US EPA regulatory rules for O3. The instrument uses Chemiluminescence with Nitric Oxide (NO) as a reagent, making it safe, stable, and effective for all applications. The NO-CL method for Ozone has several advantages over the conventional UV absorption technology, including the avoidance of positive and commonly found interferrents such as VOCs, fine particulates, Mercury, terpenes, ClO2 and others. If these pollutants are present in the atmosphere, it can cause UV absorption analyzers to give an artificially high ozone measurement.

• Chemiluminescence detection of ozone with NO for interference-free, ultra-high precision measurement
• User-selectable ranges from 0-100 ppb to 0-2,000 ppb with independent ranges and auto ranging
• US EPA Federal Reference Method approved with AutoZero and Adaptive Filtering for superb stability
• Large, vivid color graphics display with capacitive touch screen interface
• Ethernet, RS-232, and optional USB com ports with front panel USB for peripherals and firmware upgrades
• Comprehensive internal data logging with programmable averaging periods, plus temperature and pressure compensation

General

Parameter	Specification
Ranges	Min: 0-100 ppb Full scale Max: 0-2,000 Full scale (selectable, independent ranges and auto ranging supported)
Measurement Units	ppb, ppm, µg/m3, mg/m3 (selectable)
Zero Noise	< 0.15 ppb (RMS)
Span Noise	< 0.5% of reading (RMS) above 100 ppb
Lower Detectable Limit	< 0.3 ppb
Zero Drift	< 0.5 ppb/24 hours
Span Drift	< 0.5% of full scale/24 hours
Lag Time	< 10 seconds
Rise and Fall Time	< 20 seconds to 95%
Linearity	<1% of full scale
Precision	<0.5% of reading
Sample Flow Rate	500 cm3/min ±10%

Electrical Specifications

Parameter	Specification
Power Requirements	100V-120V, 220V-240V, 50/60 Hz
Analog Output Ranges	10V, 5V, 1V, 0.1V (selectable)
Recorder Offset	±10%

Communication Specifications

Parameter	Specification
Included I/O	1 x Ethernet: 10/100Base-T 2 x RS232 (300-115,200 baud) 2 x USB device ports 8 x opto-isolated digital outputs 6 x opto-isolated digital inputs 4 x analog outputs
Optional I/O	1 x USB com port 1 x RS485 8 x analog inputs (0-10V, 12-bit) 4 x digital alarm outputs Multidrop RS232 3 x 4-20mA current outputs

Physical Specifications

Parameter	Specification
Operating Temperature Range	5 - 40°C (with EPA Equivalency)
Dimensions (HxWxD)	7" x 17" x 23.5" (178 x 432 x 597 mm)
Weight	40 lbs (18.1 kg)

Certifications

Parameter	Specification
US EPA Federal Reference Method	RFOA-0216-230
US EPA Federal Equivalent Method	EQOA-0611-199

T265 Specifications  Download