FU20-05-T1-NPT | Accurate pH/ORP Sensor with Temperature Probe

Yokogawa FU20-05-T1-NPT 4-in-1 pH/ORP Wide Body Sensor – Product Description

Overview

The Yokogawa FU20-05-T1-NPT is an advanced 4-in-1 pH/ORP combination sensor with integrated temperature measurement. It provides precise pH, ORP, and temperature readings in a single compact sensor body. Moreover, its rugged PPS construction ensures long-term durability in harsh chemical and industrial environments.

Technical Specifications

Measurement Capabilities

• pH Range: 0 to 14 pH

• ORP Range: −2000 mV to +2000 mV

• Temperature Range: −10 °C to +100 °C

• Temperature Sensor: Integrated Pt1000 RTD

• Accuracy: ±0.1 pH, ±1 mV ORP

Construction & Materials

• Sensor Body: PPS (Polyphenylene Sulfide) for chemical resistance

• Measuring Electrode: G-glass for pH, platinum for ORP

• Reference Junction: Porous PTFE, double junction with gel electrolyte

• O-Rings: Viton (FTS, FSM, FTD, NPT)

• Mounting Connection: 1-inch NPT threaded, dome-shaped tip

• Insertion Length: Approx. 50 mm (shorter variant for compact installations)

Performance & Reliability

• Response Time: < 30 seconds for 95% of step change

• Pressure Rating: Up to 6 bar (87 psi) at 25 °C

• Temperature Compensation: Automatic via built-in Pt1000 sensor

• Maintenance: Designed for easy calibration and long service life

Mechanical & Environmental

• Dimensions (L × D): 50 mm × 26 mm

• Weight: 0.25 kg

• Cable Length: 5 meters

• Operating Temperature: −10 °C to +100 °C

• Storage Temperature: −20 °C to +70 °C

• Relative Humidity: 5–95% non-condensing

• Certifications: CE, RoHS

• Origin: Manufactured in Japan

FAQ

Q1: What parameters does the FU20-05-T1-NPT measure?
It measures pH, ORP, and temperature simultaneously.

Q2: What is the sensor’s accuracy?
Typical accuracy is ±0.1 pH and ±1 mV ORP.

Q3: How is temperature compensated?
Temperature is automatically compensated via the built-in Pt1000 RTD sensor.

Q4: What is the mounting connection type?
It uses a 1-inch NPT threaded connection for immersion or inline installation.

Q5: What industries is it suitable for?
It is ideal for wastewater, chemical, food & beverage, and power generation industries.