Many sensor failures are not caused by the measurement principle. They come from installation details: submerged wiring terminals, a cable used as a lifting rope, a probe touching the tank bottom, or a sensitive membrane stored dry.

Short Answer

Protect the cable and connector, do not suspend the sensor by its cable, keep the probe at the correct distance from walls and bottom, remove bubbles before measurement, and store each sensor according to its electrode or membrane requirements.

Do Not Use the Cable as a Rope

A sensor cable is designed for signal and power transmission, not for bearing the mechanical load of the sensor. If the cable is tensioned, bent sharply or rubbed against hard objects, internal wire breakage or jacket damage can occur.

Use a bracket, clamp, protection tube or suspension fixture. Keep connectors secure and prevent cable movement from pulling directly on the sensor body.

Prevent Water Ingress at Wiring Terminals

Non-waterproofed wiring terminals should not be submerged. Water ingress inside the cable can cause intermittent signals, communication errors or complete sensor failure.

During installation, check whether the terminal box, connector and cable gland match the site waterproof requirement.

Keep the Probe Away From Hard Surfaces

Optical DO probes, turbidity sensors, COD sensors, pH glass bulbs and ammonia nitrogen membranes all have sensitive measuring areas. The probe should not hit the bottom, wall, stones, tank structures or hard cleaning tools.

In laboratory tests, use a proper beaker size. In field installation, leave enough distance from the tank bottom and protect the probe from rapid flow impact.

Storage Is Part of Installation Quality

When a sensor is removed from service, storage should begin immediately. Optical DO probes should have the protective cap reinstalled and the sponge kept moist. pH and ORP electrodes should be stored in potassium chloride solution. Ammonia nitrogen sensors need the correct ammonium ion or protective solution.

Dry storage or wrong storage liquid may create problems that look like calibration failure later.

Related YexSensor PDF Guides

For calibration commands and model-specific handling notes, see the Water Quality Sensor Calibration and Usage Precautions PDF and the Water Quality Sensor Usage and Maintenance Instructions PDF.

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