Testo NO Replacement Sensor, Low 0-300 ppm

This Testo 0390 0077 NO replacement sensor is designed to keep your Testo 335 or 350 combustion analyser running true. It's a critical component for ensuring you get accurate nitrogen monoxide readings, which is essential for environmental compliance and optimizing system efficiency.

When you're out on a boiler service or tuning up industrial burners, you need confidence in your readings. Having a fresh, reliable sensor like this on hand means you won't be caught out by fluctuating or inaccurate NO levels, saving you time and callbacks.

Best For

• HVAC technicians performing combustion analysis
• Industrial boiler service and maintenance teams
• Environmental compliance officers monitoring emissions
• Anyone using Testo 335 or 350 analysers for NO measurement

Compatibility

This nitrogen monoxide sensor is specifically designed for use with the Testo 335 and Testo 350 series combustion analysers. It provides accurate readings within a low 0-300 ppm range.

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

Features

• Direct Replacement: Engineered as a straightforward swap-out for the existing NO sensor in compatible Testo analysers.
• Accurate NO Measurement: Provides precise detection of nitrogen monoxide within its specified range.
• Low Range Capability: Specifically calibrated for a 0-300 ppm (parts per million) measurement range.
• Essential for Compliance: Helps ensure your combustion analyser meets the accuracy needed for emission regulations.

Technical Specifications

What's in the Box

• One Testo 0390 0077 NO Replacement Sensor, Low 0-300 ppm

Using It on the Job

1. Power Down: Always ensure your Testo 335 or 350 analyser is completely powered off and disconnected from any probes before beginning sensor replacement.
2. Access Sensor Bay: Follow the specific instructions in your analyser's user manual to safely open the housing and access the sensor bay.
3. Remove Old Sensor: Carefully disconnect the wiring and gently remove the old NO sensor. Note its orientation for correct installation of the new one.
4. Install New Sensor: Insert the new Testo 0390 0077 sensor, ensuring it seats correctly and all electrical connections are firmly reattached.
5. Recalibrate: Close the analyser and power it on. It's crucial to perform a fresh calibration according to the manufacturer's instructions after any sensor replacement to maintain accuracy.

Limitations & Safety Notes

• This sensor is designed for specific Testo 335 and 350 analysers only; it will not work with other models.
• Always refer to your analyser's operating manual for precise sensor replacement and calibration procedures.
• Handle all sensors with care to avoid damage to the sensitive detection elements.
• Ensure the analyser is cooled and powered off before attempting any internal maintenance.

Tradie Pro Tip

When your job relies on pinpoint accuracy for compliance and efficiency, having a spare NO sensor tucked away is smart. You don't want to lose a day on-site because of a sensor that's drifted or failed.

Pair With

Pair this NO sensor with other essential Testo analyser spares like particulate filters, various probes, and calibration gases. Check out our range of combustion analysis equipment for a full suite of tools.