YOKOGAWA FU20-10-T1-NPT/FPS | pH ORP Combination Sensor

• Model: FU20-10-T1-NPT/FPS
• Brand: Yokogawa
• Series: FU20
• Core Function: Simultaneous pH, ORP, and temperature measurement
• Type: Combined pH/ORP Process Sensor
• Key Specs: 10 m cable; Pt1000 temperature element; NPT body with /FPS adapter

Product Introduction

Yokogawa FU20-10-T1-NPT/FPS is a wide-body combination sensor designed to measure pH and ORP (oxidation-reduction potential) while providing temperature measurement for compensation. Yokogawa’s FU20 platform integrates four sensing elements—pH, reference, temperature, and ORP—into one process sensor.

This specific configuration uses a 10 m cable, Pt1000 temperature element, PPS body with tapered NPT construction, and an /FPS adapter for FF40, FS40, or FD40 fittings. The sensor covers pH 0–14 and ORP measurement from approximately -1,500 to +1,500 mV.

Key Technical Specifications

Yokogawa specifies the Pt1000 element for cell temperature compensation and indication. It should not be treated as a process temperature-control sensor.

YOKOGAWA FU20-10-T1-NPT/FPS

Application and Selection Notes

The sensor is suited to water treatment, chemical processing, wastewater systems, utilities, and other liquid-process applications requiring simultaneous pH and ORP monitoring.

The /T1 and /FPS suffixes matter. The former identifies the Pt1000 element, while the latter specifies the adapter arrangement. Yokogawa’s model-code documentation confirms these configuration details.

Check the existing fitting before ordering. The sensor itself and the process adapter are not interchangeable details.

Replacement Pitfalls

Cable mismatch: The -10 configuration uses a 10 m cable. Confirm the actual cable arrangement before removal.

Temperature-element mismatch: Do not substitute Pt100 for Pt1000 without checking the analyzer configuration.

Process fitting: Verify the 3/4-inch tapered thread and /FPS adapter arrangement against the installed fitting.

Calibration: A new sensor still requires appropriate pH calibration before being returned to process service.

Storage: Glass-electrode sensors require proper storage. Leaving the sensing element dry for an extended period can affect measurement performance.

Personally, I would check the complete suffix code and process fitting first. With pH sensors, mechanical compatibility and calibration setup are just as important as the electrode itself.

Quality Inspection and Testing

1. Inbound inspection: Check the model label, cable, sensor body, electrode tip, threads, O-rings, and adapter for damage.
2. Electrical inspection: Verify cable continuity and the Pt1000 circuit.
3. Functional check: Where practical, inspect response in appropriate reference solutions and verify stable pH/ORP behavior.
4. Configuration check: Confirm the cable length, Pt1000 option, NPT construction, and /FPS adapter.
5. Final QC: Protect the sensing element, package the sensor securely, and record inspection results.

Test photographs and available inspection records can be supplied with the shipment.

Warranty and Availability

Condition: Confirm whether the offered sensor is New Original (New Surplus), used, or refurbished.

Lead Time: Subject to physical stock and inspection requirements.

Warranty: Supplier warranty applies according to the agreed commercial terms.

The YOKOGAWA FU20-10-T1-NPT/FPS is a configuration-specific process pH/ORP sensor. For international procurement, confirm the complete model code, cable length, Pt1000 element, process fitting, adapter, condition, country of origin, and export documentation before shipment.