Testo NO Replacement Sensor 0-3000 ppm

This Testo 0390 0093 NO Replacement Sensor was designed for use with Testo 335 and 350 combustion analysers. It provided accurate measurements of nitrogen monoxide, a key component in emission testing, helping techs ensure systems ran cleaner and met compliance standards. While this specific sensor is no longer available, understanding its specifications can assist in identifying suitable alternatives or servicing legacy equipment still in the field.

Back when it was available, fitting a fresh sensor was a routine job to keep your analyser calibrated and ready for the next rooftop job or boiler service. Keeping accurate readings is crucial, especially for environmental compliance.

Best For

• HVAC service technicians
• Combustion analysis and flue gas testing teams
• Environmental monitoring specialists

Compatibility

This Testo NO replacement sensor was specifically engineered for seamless integration with Testo 335 and Testo 350 series combustion analysers. It was designed to maintain the measurement accuracy and reliability these units are known for. If you're running a different model, check fittings and specs before ordering any replacement parts.

Features

• Precise NO Measurement: Capable of accurately detecting nitrogen monoxide (NO) concentrations.
• Wide Measurement Range: Designed to measure NO levels from 0 up to 3000 ppm (parts per million).
• Direct Replacement: Engineered as a drop-in replacement part for compatible Testo analysers.
• Analyser Integration: Full compatibility with Testo 335 and 350 models for reliable data.

Technical Specifications

What's in the Box

• 1 x Testo 0390 0093 NO Replacement Sensor, 0-3000 ppm

Using It on the Job

When this sensor was in production, replacing it was a straightforward process:

1. Power Down: Always ensure your Testo analyser is powered off and disconnected from any power source.
2. Access Sensor Bay: Carefully open the analyser's casing to access the sensor compartment, following the manufacturer's instructions.
3. Remove Old Sensor: Gently disconnect and remove the old NO sensor. Note its orientation for correct replacement.
4. Install New Sensor: Insert the new 0390 0093 sensor into its designated slot, ensuring a secure and correct connection.
5. Recalibrate: Once installed, close the analyser, power it on, and perform a full calibration as per the Testo analyser's manual to ensure accurate readings.

Limitations & Safety Notes

• This product, Testo 0390 0093, has been discontinued by the manufacturer and is no longer available.
• Only compatible with Testo 335 and 350 series analysers. Using it with other models may lead to inaccurate readings or damage.
• Always refer to your Testo analyser's user manual for specific sensor replacement and calibration procedures.
• Ensure proper safety precautions are followed when opening analyser casings.

Regular calibration and sensor checks are vital for any combustion analyser. Even if a sensor isn't at its end-of-life, calibration drift is real – don't skip it if you want reliable data. Keep your analyser's firmware up to date too, as this can affect sensor performance.

Pair With

For comprehensive flue gas analysis, this type of sensor would typically be paired with a Testo 335 or 350 combustion analyser, along with other essential gas sensors like O2 and CO sensors, and a suitable probe for sampling flue gases.