Testo CO Replacement Sensor with H2 Compensation

This is the Testo 0390 0109 replacement carbon monoxide (CO) sensor, crucial for keeping your Testo 330-2/-3 or 327-2 flue gas analyser running spot-on. It helps techs maintain accuracy when checking combustion appliances.

Having a spare or knowing when to replace a CO sensor is vital; a faulty one can give misleading readings, putting occupants at risk and leading to call-backs, especially during the busy Australian winter heating season. This sensor includes H2 compensation to prevent common interference.

Best For

• Flue gas analysis for residential and commercial heating.
• Combustion system commissioning and maintenance.
• HVAC service technicians and gasfitters.

Compatibility

This Testo CO replacement sensor (0390 0109) is specifically engineered for use with:

• Testo 330-2 Flue Gas Analyser
• Testo 330-3 Flue Gas Analyser
• Testo 327-2 Flue Gas Analyser

The integrated H2 compensation helps eliminate common cross-interferences from hydrogen, ensuring more reliable CO readings in various combustion environments.

If you're running a different model, check fittings and specs before ordering.

Features

• Direct Replacement: Engineered as a genuine Testo part for seamless integration with compatible analysers.
• H2 Compensation: Minimises cross-sensitivity to hydrogen, providing more accurate CO measurements.
• High Measurement Range: Detects carbon monoxide up to 8000 ppm, suitable for a wide array of combustion applications.
• Reliable Performance: Ensures your Testo flue gas analyser continues to deliver trustworthy data for safe operation.

Technical Specifications

What's in the Box

• Testo 0390 0109 CO Replacement Sensor with H2 Compensation, 8000 ppm

Using It on the Job

1. Power Down & Disconnect: Always power off your Testo flue gas analyser and disconnect all probes and hoses before opening the unit.
2. Access Sensor Compartment: Carefully open the analyser casing according to the manufacturer's instructions to access the sensor block.
3. Remove Old Sensor: Gently unclip or unscrew the old CO sensor. Note its orientation to ensure the new sensor is installed correctly.
4. Install New Sensor: Carefully insert the new Testo 0390 0109 sensor, ensuring it's seated properly and any clips or screws are secured.
5. Reassemble & Calibrate: Close the analyser casing, reassemble the unit, and perform a fresh air zeroing and any necessary calibration as per your analyser's manual before use.

Limitations & Safety Notes

• This sensor is specifically for the listed Testo flue gas analysers; it won't work with other models or brands.
• Always handle sensors with care to avoid damage to the sensitive internal components.
• Regular calibration and maintenance of your flue gas analyser are crucial for accurate readings and safe operation.
• Always follow your analyser's operating manual for sensor replacement and calibration procedures.

Tradie Pro Tip

Don't wait for your analyser to throw an error code before thinking about sensor replacement. Keep an eye on its response time and stability; if it's getting sluggish or erratic, it's probably time. A pre-emptive swap can save you a frustrating call-out.

Pair With

Pair with a Testo Flue Gas Analyser Maintenance Kit to keep your unit in top condition, and explore our range of Testo Analyser Probes for versatile testing options.