​Model 465L +O2

Process and Safety Ozone Monitor





  • O2 Range: 0-1% to 0-100%, user selectable
  • Dual ranges and auto ranging
  • Large, vivid, and durable color graphics display with touch screen interface
  • Ethernet, RS-232, and (optional) USB com ports
  • Front panel USB connections for peripheral devices and firmware upgrades
  • 8 analog inputs (optional)
  • Adaptive signal filtering optimizes response time
  • Temperature & pressure compensation
  • Comprehensive internal data logging with programmable averaging periods
  • Ability to log virtually any operating parameter
  • Available with Numaview software upon request
  • Two-year warranty



​The following table provides a list of items that  need regular maintenance to ensure your product remains in good working condition.

Internal Particulate FilterReplace6 months18.3
UV LampAdjustAs Indicated by ‘Check Lamp’ LED or status output8.4
UV LampReplaceAs required; when adjustment can no longer be performed.8.5
Sample PumpReplace2 years8.6
O3 Sensor Module ValveReplace2 years8.7
O2 sensorReplace1 year or as necessary8.8
Water Dropout Fileter (option)ReplaceAs needed8.9
1 When external sample line pre-filters are used.  If pre-filters are not used, internal sample filter should be replaced every month.


1 These Items are required to maintain full warranty; all other items are strongly recommended.

2 A pump rebuild kit is available from Teledyne API's Technical Support including all instructions and required parts

 3 Replace desiccant bags each time the inspection plate for the sensor assembly is removed.




07795B - Manual, Operation, M465L+O2.pdf465L+02 Manual1895 KB
465L_O2_Literature_RevA.pdf465L + O2 Brochure791 KB


Ranges Min: 0 - 1 % full scale
Max: 0 - 0-100% F​ull scale (selectable
Zero Noise < 0.2 % ppb (RMS)
Span Noise < 0.05% of reading (RMS)
Lower Detectable Limit 0.04 %
Zero Drift < ±0.02% /24 hours; < ±0.05% /7 days
Span Drift < ±0.1% /7 days
​Temperature Coefficient < ±0.01% per degree C
Accuracy < ±0.1%
Rise/Fall Time < 60 seconds to 95%
Linearity < ±0.1%
Precision 0.5% of reading above 50 ppb
Sample Flow Rate  120 ml ± 20ml/min
​Humidity Range ​0 - 95% RH
Power Requirements 100V-120V, 220V-240V, 50/60 Hz
Analog Output Ranges 10V, 5V, 1V, 0.1V (selectable)
Recorder Offset ±10%
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
Operating Temperature Range 5 - 40ºC
Dimensions (HxWxD) 7” x 17” x 23.5” (178 x 432 x 597 mm)

Specifications are subject to change without notice.
All specifications are based on constant conditions.​

 28 lbs (12.7 kg) ​​


The Model 465L UV Photometric Ozone Monitor is an extremely stable analyzer, ideal for critical low-level ppm safety and process applications.  Its calibration is NIST traceable and the included pressure and temperature compensation ensure high accuracy under all conditions.  An integral micro fuel cell sensor provides accurate, continuous monitoring of O2 and allows measuring of both gases in a single instrument.

The Model 465L + O2 has been designed to deliver excellent performance, high reliability and simple operation.  Operating parameters can be easily set up in the field using the operator-friendly menu driven software.

Built-in diagnostics provide warning signals in case operating parameters are out of range.  Test values can be viewed while the Model 465L + O2 is operating.  These displays, warnings, and self-diagnostics, along with the modular design, allow maximum uptime. In addition, any function that can be set or monitored from the front panel can be remotely set or viewed through the bi-directional RS-232 port.