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Ambient Ozone Monitor

ClearWater Tech — Ozone Safety

Ambient Ozone Monitor CMT295/230

Continuous gaseous ozone monitoring for safe aquatic environments — OSHA-compliant workplace protection with automatic shutdown capability.

Features

  • LED Status Diagnostics
    Dual LED indicators provide instant visual feedback on sensor status, alarm state and cleaning cycles.

 

  • Replaceable Sensor Head
    Indium Tin Oxide semiconductor sensor head is field-replaceable, extending unit service life significantly.

 

  • Cat 5 / RJ45 Interface
    Industry-standard RJ45 connection with two independent volt-free relay outputs for integration with control systems.

 

  • Auto-Cleaning Cycle
    Runs a 3-minute sensor head cleaning cycle every hour to prevent oxide build-up and maintain accuracy.

 

  • Power Relay Shutdown
    Hardwired 250VAC / 10A power relay to directly cut ozone generator power if levels exceed set point.

 

  • Adjustable Alarm Set Points
    Dip-switch selectable alarm thresholds: 0.05, 0.08, 0.10 or 0.15 ppm. Factory default: 0.10 ppm.
ClearWater Ambient Ozone Monitor CMT295/230

Benefits

  • Ozone leak detection protects personnel from harmful exposure
  • Ensures the facility operates below OSHA permissible ozone limits for a safe workplace
  • Hardwired relay shutdown eliminates ozone output automatically on alarm
  • Active self-cleaning sensor head reduces maintenance requirements
  • Factory calibrated — no field calibration required for the life of the sensor head
  • Compact design suits tight equipment rooms and pump houses

Technical Specifications

Parameter Specification
Sensor Type Gas Sensitive Semiconductor (Indium Tin Oxide)
Measurement Range 0.000 – 0.250 ppm ozone
Alarm Range (product sheet) 0 – 0.5 ppm
Alarm Set Points 0.05 / 0.08 / 0.10 / 0.15 ppm (dip-switch)
Power Supply (included) 240 VAC 50–60 Hz input → 12 VDC, 12W output
Power Consumption 12 VDC @ 400 mA
Unit Interface RJ45 connector + 2.1mm Barrel DC Connector
Relay 1 & 2 (RJ45) Volt-free contacts, max 50 V / 150 mA
Power Relay Max 250 VAC / 10 A
Operating Temperature 0°C to 40°C (32°F to 104°F)
Relative Humidity 5% to 95%
Dimensions (H × Dia.) 5.07″ × 3.80″ (sensor unit)
Calibration Factory calibrated — no field recalibration required
Cleaning Cycle 3 minutes every hour (automatic)
Warranty 1 year limited (ClearWater Tech LLC)

Alarm Dipswitch Settings

Position 1 Position 2 Alarm Set Point
Closed Closed 0.05 ppm Ozone
Open Closed 0.08 ppm Ozone
Closed Open 0.10 ppm Ozone (Factory default)
Open Open 0.15 ppm Ozone

LED Status Indicators

Power LED Alarm LED Meaning
Flashing Off Sensor head in cleaning cycle
On Solid Off Powered and operating normally
On Solid Flashing Ozone above set point — Relays open
Flashing Flashing Sensor head failure — Relays open

OSHA Compliance
Configured to alarm below OSHA’s 0.1 ppm permissible ozone exposure limit, keeping your team safe.

Automatic Shutdown
The power relay can be wired directly to your ozone generator to cut power instantly on alarm.

Placement Guidance
Ozone is heavier than air — mount the sensor low and near ozone equipment for accurate leak detection.