YOKOGAWA FU-20-T1-NPT

Model：YOKOGAWA FU-20-T1-NPT

Manufacturer: YOKOGAWA

Size: 20*20*30cm

Detail Specification: pH/ORP

Comment:Carton

Shipping Weight:5Kg

Estimated Lead Time: 12 Weeks

Payment：T/T

HS CODE：9026201090

Unit price (EXW): 930 US dollars

Delivery time: 12 – 16 weeks

product details

YOKOGAWA FU-20-T1-NPT

Product Overview

The YOKOGAWA FU20-T1-NPT is an all-in-one wide body pH/ORP sensor from the FU20 series, manufactured by Yokogawa Electric Corporation. This four-in-one combination sensor integrates pH glass electrode, Ag/AgCl reference system, solid platinum ORP electrode, and Pt1000 temperature element into a single rugged housing. Designed for demanding industrial process environments, the FU20 series is widely deployed across water treatment, chemical processing, power generation, food and beverage, and pharmaceutical applications-27.

Model Number Breakdown: YOKOGAWA FU20-T1-NPT

Code Segment	Interpretation
FU20	Basic model: Wide body (26 mm diameter) pH/ORP all-in-one combination sensor
T1	Temperature element: Built-in Pt1000 RTD
NPT	Process connection: 3/4″ male NPT tapered thread (PPS body, dome-shaped)

The suffix “T1” specifies a built-in Pt1000 temperature sensor for automatic temperature compensation of pH readings. The “NPT” suffix indicates the sensor housing material (PPS GF40) with a dome-shaped measuring end and standard 3/4″ NPT male threads for direct in-line mounting-11. Cable length, included sensors, and optional features are defined by additional prefix digits (e.g., FU20-05-T1-NPT for 5-meter cable).

Key Specifications

Parameter	Specification
Product Type	FU20 pH/ORP 4-in-1 wide body combination sensor
Measuring Principles	pH glass electrode + Ag/AgCl reference system + Solid platinum ORP electrode + Pt1000 temperature sensor
Body Diameter	26 mm
Housing Material	PPS 40GF (RytonTM) with glass filling
Process Connection	3/4″ male NPT tapered thread
O-ring Material	None (standard NPT version)
Reference Junction	Porous PTFE diaphragm
Cable Type	Coaxial with 4 additional leads
Reference System	Ag/AgCl with saturated KCl, double junction
Electrolyte	Large-volume polymerized/gelled electrolyte

Functional Specifications (at 25°C)

Parameter	Specification
Isothermal Point	pH 7
Glass Impedance (Dome Shape)	350 MΩ (G-glass)
Junction Resistance	0.5 – 5 kΩ
Temperature Element	Pt1000 per IEC 751
Asymmetry Potential	< 15 mV
Slope	> 96% of theoretical value

Dynamic Specifications (at 25°C)

Parameter	Specification
Response Time (pH step 7→4)	< 15 seconds for 90%
Response Time (temp step 10°C)	< 3 minutes for 90% (dome shape)
Stabilization Time	< 2 minutes

Operating Range

Parameter	Specification
pH Range	0 – 14
ORP Range	–1500 to +1500 mV
Temperature Range	–10 to +105°C (14 to 212°F)
Pressure Range	0 to 10 bar (0 to 142 PSIG)
Conductivity	> 50 µS/cm
Storage Temperature	–30 to +50°C (–22 to 122°F)

Key Features

Simultaneous pH and ORP measurement – Single sensor delivers both parameters, reducing instrumentation count and installation complexity-27.

Integral Pt1000 temperature element – Mounted directly at the measuring tip for accurate temperature compensation and enhanced pH precision-27.

Double junction and long diffusional path – Effectively resists reference system poisoning and contamination in chemically challenging media-27.

Large-volume polymerized electrolyte + porous PTFE diaphragm – Extends operational lifetime by slowing electrolyte depletion and junction clogging-27.

Solid platinum electrode for ORP measurement / solution ground – Provides reliable redox potential measurement and diagnostic capability-27.

Rugged PPS 40GF (RytonTM) construction – Delivers exceptional chemical resistance and mechanical durability in harsh industrial environments-27.

Integrated 3/4″ NPT tapered thread – Enables quick, tool-free installation directly into process pipelines-27.