YOKOGAWA FU24 pH/ORP Composite Sensor with Pressure Compensation (IM 12B06J03-03EN-P)

YOKOGAWA FU24 pH/ORP Composite Sensor with Pressure Compensation (IM 12B06J03-03EN-P)

Product positioning and core features

1. Core positioning

FU24 is a composite sensor that integrates pH, ORP (oxidation-reduction potential), rH (relative hydrogen activity), and temperature measurements. It uses a patented bellows system to achieve pressure compensation and maintain stable measurement in pressure fluctuation environments. It also supports full angle safety (including inversion) and is suitable for harsh industrial scenarios.

2. Core advantages

Pressure compensation: The patented bellows system can balance the internal and external pressures in real time, avoiding the impact of process pressure fluctuations on sensor life. It supports 0-10 bar (gauge pressure) and -0.99 bar (negative pressure), and there is no risk of liquid leakage during sudden pressure changes;

Multi parameter integration: achieve pH (0-14), ORP (-1500~+1500 mV), rH (0-100), and temperature (-10~105 ℃) measurement in a single installation, reducing installation space and cost;

Durable design: The main material is PPS 40GF (glass fiber reinforced polyphenylene sulfide), which is resistant to chemical corrosion; The measuring end adopts G-type glass (pH electrode) and AR type glass (reference tube), suitable for various harsh media;

Explosion proof safety: certified by multiple national explosion prevention certifications such as ATEX, IECEx, FM, NEPSI, etc., intrinsic safety type (Ex ia IIC T3~T6 Ga), can be used in hazardous areas such as Class I Div.1/Zone 0;

Intelligent adaptation: We offer models with fixed cables (5m/10m) or Vario Pin connectors (VP without ID chip/VS with ID chip). The VS model can be paired with the SA11-P1 intelligent adapter for data storage and quick replacement.

Detailed explanation of technical specifications

1. Basic measurement parameters

Parameter category specification details

The pH measurement range is 0-14 pH, the asymmetric potential is 8 ± 15 mV, the slope is ≥ 96% of the theoretical value (25 ℃), and the response time t ₉₀<15 seconds (pH 7 → 4 step);

ORP/rH measurement ORP range -1500~+1500 mV, rH range 0~100, using solid platinum electrode, reference system is Ag/AgCl (3.3M KCl);

Temperature measurement with built-in Pt1000 sensor (compliant with IEC 751), dome type -10~105 ℃ (response time t ₉₀<1 minute), flat type 15~105 ℃ (response time t ₉₀<4 minutes);

Environmental adaptability protection level IP67, process temperature -10~105 ℃ (dome type), 15~105 ℃ (flat type), medium conductivity needs to be greater than 10 μ S/cm;

The main material of the mechanical performance is PPS 40GF, and the contact medium components include Viton (O-ring/bellows), PTFE (reference junction), and platinum (grounding pin); The maximum tightening torque is 7.5 Nm, and the interface is a 1-inch NPT thread;

2. Explosion proof and compliance certification

FU24 has passed the global multi regional explosion-proof and safety certification, with the following core certification parameters:

Certification standard explosion-proof level key parameters applicable areas

ATEX/IECEx Ex ia IIC T3~T6 Ga Ui=18 VDC, Ii=170 mA, Pi=400 mW EU and IECEx member states

FM (US/Canada) Class I Div.1/Zone 0, Ex ia IIC Temperature Class T3 (-40~105 ℃)~T6 (-40~40 ℃) US, Canada

NEPSI (China) Ex ia IIC T3~T6 Ga Certificate No. GYJ21.2891X China

Other certifications PESO (India), KCs (South Korea), EAC Ex (Russia) based on ATEX/IECEx certification endorsement for India, South Korea, Russia, etc

3. Model classification

According to the differences in connection methods and functions, FU24 is divided into the following models, with clear suffix code meanings:

Core characteristics of model suffix classification

FU24-05/-10 fixed cable type cable length 5m/10m, directly connected to transmitter (such as FLX21/PH202S series), without ID chip;

FU24-VP Vario Pin 8-pin connector without ID chip, requires WU10/WE10 cable to connect analog transmitter, without sensor information storage function;

FU24-VS Vario Pin with ID chip 8-pin connector (including ID chip), can be paired with SA11-P1 smart adapter, stores sensor calibration data, supports hot swapping;

Suffix - T1/- GC temperature sensor and region-T1: Pt1000, compatible with global certifications such as ATEX/FM/NEPSI; -GC: Compatible with Korean KCs certification;

Suffix - NPT/- FSM measuring end type - NPT: dome type (wear-resistant, suitable for media containing particles); -FSM: Flat type (self-cleaning, suitable for viscous media);

Installation and wiring process

1. Installation preparation

(1) Site selection requirements

Ensure that the measurement points represent the true state of the process medium, avoiding dead zones, bubble accumulation, or low flow rates (recommended flow rate of 0.1~1 m/s);

The ambient temperature should meet the explosion-proof level requirements (such as T6 level -40~40 ℃, T3 level -40~105 ℃), and avoid direct sunlight or severe vibration;

If the conductivity of the medium is greater than 10 μ S/cm, an electrolyte (such as KCl) needs to be added to ensure measurement stability.

(2) Pre installation inspection

After unpacking, confirm that the sensor model and serial number are consistent with the order, check that the cables/connectors are not damaged, and that the measuring end's "wet pocket" (transport protective fluid) is intact;