YOKOGAWA SC4AJ Conductivity Sensor Manual

YOKOGAWA SC4AJ Conductivity Sensor Manual

Equipment foundation and adaptation system

1. Core positioning and application scenarios

SC4AJ is a compact sensor designed specifically for low conductivity solutions, suitable for industries such as semiconductors, power, and pharmaceuticals that require high purity (such as ultrapure water detection). It needs to be paired with a specific analyzer/converter to form a complete detection system. The compatible equipment and corresponding manual information are as follows:

Corresponding manual number for supporting equipment type

FLXA202, FLXA21 2-wire analyzer IM 12A01A02-01E

FLXA402 4-wire converter IM 12A01F01-02EN, IM 12A01F03-01EN, etc

SC450G Conductivity Converter IM 12D08N05-01E

SA11 Smart Adapter IM 12A06S01-00EN-P

2. Equipment core classification and parameters

SC4AJ is classified into models based on electrode material, installation method, and battery constant. The core differences focus on adaptation scenarios and measurement ranges. The specific classifications are as follows:

Classification dimensions, specific types, key parameters/characteristics

Electrode material titanium (- T) is only suitable for adapter installation type (- AD), with strong corrosion resistance

316L stainless steel material (- S) is compatible with all installation methods and has strong universality

Installation method: Adapter installation type (- AD) with 3/4NPT or R3/4 adapter (stainless steel/PVDF material), sensor length 9cm/15cm

Welding socket type (- SA) requires straight type (/SA1) or 15 ° angle type (/SA2) welding socket, with fixed sensor length

Welding clip type (- SB/- SC) - SB compatible 1/1.5 inch clip (/SB1//SB2), - SC compatible 2-inch clip (/SC1), including sealing ring

Battery constant 0.02 cm ⁻¹ (-002) measurement range 0-0.5 μ S/cm to 0-200 μ S/cm, suitable for extremely low conductivity solutions

0.1 cm ⁻¹ (-010) measurement range 0-5 μ S/cm to 1 mS/cm, suitable for low conductivity solutions

Cable terminal pin type/M4 ring type/M3 ring type/Variopin pin type compatible with multiple devices; M4 ring adapter FLXA202/FLXA21; M3 ring adapter FLXA402/SC450G; Variopin compatible with SA11

3. General technical specifications

Temperature and pressure: The electrode has a conventional temperature of 0-110 ℃ (can be steam sterilized at 135 ℃ for 30 minutes) and a pressure of 0-1 MPa; The tolerance range of the bracket varies with the material (stainless steel 316L has higher temperature resistance, PVDF has lower temperature resistance, please refer to the temperature pressure curve for details)

Contact fluid material: main body (316L stainless steel/titanium), O-ring (FKM fluororubber, EPDM EPDM EPDM), adapter (PVDF or 316L stainless steel)

Temperature compensation: Built in Pt1000 temperature sensor to calibrate the effect of temperature on conductivity

Protection restriction: The sensor mold and metal joint are not waterproof and cannot be immersed in process water

Safety regulations and usage restrictions

1. Core security principles

Prohibited unauthorized operation: Only use according to the instructions in the manual, unauthorized modification of the device will result in loss of protective function; Repairs require Yokogawa certified spare parts, unauthorized modifications are prohibited

Static electricity and explosion prevention: The flow of ultrapure water in plastic pipes may generate static electricity, and it is necessary to avoid the sensor conducting static electricity and damaging the converter circuit; Must comply with explosion-proof standards such as IEC 60079-11 and GB 3836.4-2010 (TIIS certified models cannot be connected), and if necessary, affix a "simple equipment" label

Temperature limit: The maximum process temperature needs to be determined based on the supporting analyzer (FLXA202/FLXA21) and temperature level (T1-T6). For example, under T6 level, the maximum process temperature at 40 ℃/60 ℃ ambient temperature is 49 ℃; At T5 level, the ambient temperature is 95 ℃ at 40 ℃ (note that the upper limit of T5 level is 100 ℃)

2. Manual usage guidelines

It needs to be handed over to the end user and properly stored, and unauthorized copying/dissemination is prohibited; Yokogawa reserves the right to improve manuals and equipment without prior notice

The manual only describes the device functions and does not guarantee adaptation to specific user scenarios; The equipment is provided as is, and Yokogawa is not responsible for unforeseeable direct/indirect losses

Installation and Wiring Guide

1. Core installation requirements

Installation principle: Ensure uniform composition and no dead zone when the solution flows through the sensor; The sensor needs to be submerged above the outlet to ensure continuous liquid flow between the electrodes; Reserve maintenance space for easy disassembly and release of process pressure; Confirm that the pressure at the installation site is within the tolerance range of the sensor and adapter

Steps for different installation methods:

Adapter installation type (- AD): Assemble in the order of "nut → adapter support (stainless steel adapter) → adapter → sealing ring → sensor body", tighten the nut with a torque of about 190 N · m (tighten with fingers and then use a wrench to tighten 1.25 turns)