Gas Monitor - API-465L (Refurbished) - Low Range Process


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California Regulatory Information

SKU: 011784

Product Overview


The API-465L UV Photometric Ozone Monitor is perfect for low ozone level measuring, and is extremely stable. It is NIST traceable calibrated and contains pressure and temperature compensation technology to ensure that it reads accurately under any condition. The wall-mount version is in a NEMA enclosure and is extremely hardy. The rack-mount version is a good choice for including in systems. 

6 Channel Option - This option allows the M465L to measure ozone at up to six different sampling points by using an internal stream selector. 3 or 6 channel stream selectors are available.


  • UV Absorption Method
  • Microprocessor controlled
  • Menu driven software
  • Lower detectable limit 3 ppb
  • Programmable High and High-High alarm contacts
  • Built-in diagnostics
  • Self-check warning alarms
  • Fast response times
  • Minimal zero drift
  • 1, 3 and 6 stream versions available for safety monitoring
  • Programmable concentration alarms
  • Temperature and pressure compensation (standard)
  • Optional Ethernet
  • NEMA 4X - NEMA enclosure 


  • Medical, Food and Beverage​
  • Water Treatment​
  • Semiconductor
Optional Accessories Description
 Ethernet Communication protocol allowing for connections to a wide variety of devices and networks.
 Sample Conditioner The Sample Conditioner option is a water drop-out filter and a permeation gas dryer, designed for high-humidity environments.
 Intake Filter Kit PVDF Filter Housing 47 mm with 1/4" Fittings. Kit Includes: FHS (Filter Housing), and FPK-10 (Filters- Package of ten)
 Measurement Principle    UV Absorption (Beer-Lambert Law)
 Measurement Range 0-1 ppm
 Units ppmv, ppbv, pphm, ug/m3, mg/m3
 Precision / Repeatability ​± 0.5% of full scale
 Accuracy ± 1% of full scale
 Lower Detectable Limit 0.003 ppm
 Display Resolution 0.001 ppm
 Zero Drift .005 ppm/month, non-cumulative
(.050 ppm/month Ranges >20 ppm)
 Temperature Range 5 - 45°C
 Relay Mode Latching/non-latching, operator selectable
 Stream Selector Cycle Time 1 min. to 6 min., operator selectable
 Sample Flow Rate 0.8 liters/minute
 Power 100-240VAC, 50/60Hz, 74W
 Analog Output 0-5V or 4-20mA isolated output
 High Current Relay Outputs Form C Dry Contact, 250VAC/5A (System OK, Global HI Alarm, Global HI-HI Alarm)
 Low Current Relay Outputs
 (3 or 6 channel, 3 per channel)
SPST Dry Contact, 50VDC/250mA Resistive Load (Channel ID, HI Alarm, HI-HI Alarm
 Status Outputs System OK, Invalid Reading, Pneumatic Fault, UV Lamp Fault 
 Dimensions (HxWxD) Rack Mount - 5.22" (133 mm) x 19" (483 mm) x 15.3 (388 mm)
NEMA 4X - 16.85" (428 mm) x 15.60"​ (396 mm) x 6.90" (175 mm)
  • Rack Mount - 12.6 lbs (5.73 kg)
  • NEMA 4X - 15.1 lbs (6.85 kg) ​​
 Stream ID Outputs Channel 1 through 6​
 RS-232 (Optional RS-485) 57.6 Kbaud, DB-9 connector​

465L Manual  465L Information Sheet
465L Manual 465L Information Sheet


Warranty Information

Seller warrants that all Products will conform to the Specifications and will be free from defects in material workmanship and programming. Claims for Products not complying with this warranty shall be submitted by Buyer no later than 6 months from delivery date to Buyer. Seller shall promptly repair or replace, at its option and expense, non-complying Products. The shipment of non-complying Products by Buyer to Seller, and the return shipment of repaired or replacement Products by Seller to Buyer shall be at Seller's expense, unless it shall be determined that Buyer returned a Product that was in compliance, in which case such cost shall be borne by Buyer and, if paid by Seller, these expenses shall be reimbursed by Buyer within thirty (30) days of notice by Seller. Buyer shall receive a credit for any non-complying Products returned for repair or replacement. All non-complying Products shall be returned to Seller (at its offices or as otherwise instructed) no later than 30 days as of the date the non-compliance of any such Product has been discovered. Seller is NOT responsible for any/all damages suffered to the Products that is caused by the Buyer. Such as but not limited to damage by wrong electrical current, damage through crush or dropping the product, damage through untrained users of Product, damage through improper operations.

California Regulatory Warning

Example Image
Use in unoccupied spaces only.
Health hazard warning: emits ozone.

This product is not CARB Certified (Ozone Emissions for Air Cleaners).
Product Disclaimer: Does not meet California air cleaner regulation requirements; cannot be shipped to California.