The Drexelbrook 700‑0018‑222 is an industrial “engineer censor” (level sensor/transmitter) used for precise liquid or gas level measurement in process plants. Common failure modes for this class include drift of the sensing element, contamination of the probe, power supply instability, and signal line corrosion or loose connections. Begin troubleshooting by verifying that the unit receives its rated input voltage and checking the output signal against a calibrated reference; inspect the probe housing for physical damage or blockage, and examine all wiring for signs of wear or disconnection. If error codes are available in the control system, review them for indications of over‑temperature or communication faults before proceeding to component replacement.[oss-gpt-20b]