YHSP-SAR-Ex is an intrinsically safe electronic leak point sensor designed for chemical-family specific detection of acids, alkalis, and inorganic solutions. It is certified with the Ex ia intrinsically safe rating (Ex ia IIC T6) for stable operation in hazardous areas. It detects leaks within 2 to 60 seconds, depending on the chemical. The sensor is reusable after cleaning, with no replacement parts required after detection.

🛡️ KCs Intrinsically Safe Certification | Ex ia IIC T6
Intrinsically Safe Leak Detection for Acid, Alkaline and Inorganic Solutions
YHSP-SAR-Ex: chemical family detection, fast response depending on the chemical, and reuse after cleaning.
Chemical leaks in industrial facilities require leak detection suited to the target liquid. YHSP-SAR-Ex detects acid, alkaline and inorganic solutions using an intrinsically safe electronic point sensor. It is suitable for hazardous areas when used in an intrinsically safe circuit with the required barrier, control module, protective housing and base.
💎 Optimized Detection by Chemical Family
• Designed for detection of acid, alkaline and inorganic solutions, including sulfuric acid, hydrochloric acid, caustic soda and hydrogen peroxide.
⚡️ Fast Response (Chemical-Dependent Response Time)
• Detects leaks within 2 to 60 seconds, depending on the chemical. Response times for typical detection media are specified in the technical specifications.
♻️ Reusable After Cleaning
• The sensor is reusable after cleaning. No replacement parts are required after detection.
🛡️ Intrinsically Safe Design (Ex ia)
• KCs-certified Ex ia IIC T6 design for hazardous areas. Use only in an intrinsically safe circuit.
💡 Control Module Integration
• Operates with the MTL7760ac Zener barrier and a YOOHANTECH leak detection control module. Select either YHSM-01S-AR (1 channel) or YHSM-04S-AR (4 channels).
⚙️ Safety System Configuration Guide (System Configuration)
• Intrinsically Safe Ex ia Rating
Use the sensor only in an intrinsically safe circuit. KCs intrinsic safety certification: Ex ia IIC T6, Certificate No. 25-AV2BO-0186X. Refer to the YHSP-SAR-Ex Sensor Wiring Guide for detailed wiring instructions.
• Required Integration Components
The YHBK-P02 protective housing, YHWS-P02 grounding and positioning base, and MTL7760ac Zener barrier are required. Use either a YHSM-01S-AR (1-channel) or YHSM-04S-AR (4-channel) leak detection control module.
View test footage verified under real leak conditions, including sensor response and alarm operation.
| Item | Details |
| Model | YHSP-SAR-Ex |
| Operating Voltage |
DC 5 V |
| Measurement Range |
0 ~ 3000 |
|
Output |
Phase Shift |
| Detection Media | Acid, alkaline and inorganic solutions, including sulfuric acid, hydrochloric acid, caustic soda and hydrogen peroxide |
| Sensor Dimensions | 68 × 68 × 32 (±0.5) mm |
| Overall Dimensions | 178 × 80 × 34 (±0.5) mm |
| Materials | SUS 304, PP, etc. |
| Operating Environment | Around tanks and piping in industrial facilities Suitable for indoor and outdoor use |
| Operating Temperature | -20 to +55 °C |
| Typical Detection Media | • Alkaline solutions: caustic soda (NaOH), 5% to 50% (response within 10 seconds) • Acid solutions: sulfuric, hydrochloric, nitric and hydrofluoric acids, 5% to 98% (response within 10 seconds) • Inorganic solutions: hydrogen peroxide, etc. (response within 20 seconds) |
| Sensor Wiring | 2-wire sensor: White (+), Black (−) |
| Certification | KCs Intrinsic Safety Certification — Ex ia IIC T6 Certificate No. 25-AV2BO-0186X Certification Body: KOSHA |
| Intrinsic Safety Parameters | Ui = 10 V; Ii = 200 mA; Pi = 0.5 W Li = 0.4 mH; Ci = 33.6 nF (with 160 m cable) Ta: -20 to +55 °C |
| Key Points | • Chemical family detection: acid, alkaline and inorganic solutions • Fast response: within 2 to 60 seconds (depending on the chemical) • Control module integration: MTL7760ac barrier with either YHSM-01S-AR or YHSM-04S-AR • Reusable after cleaning: no replacement parts required after detection • Intrinsically safe design: Ex ia IIC T6; use only in an intrinsically safe circuit |
Semiconductors · Petrochemicals · Oil Refining · Batteries · Power Generation · Steel · Warehousing · Wastewater Treatment · Defense
Explore real industrial leak detection installations and get guidance on a configuration that fits your facility.

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🔹YHSM-01S-AR (1-Channel Leak Detection Control Module) |
🔹YHSM-04S-AR (4-Channel Leak Detection Control Module) |
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🔹MTL7760ac (Zener Barrier — Required) |
🔹YHWS-P02 (Grounding & Positioning Base — Required) |
YHBK-P02 Dedicated Protective Housing, YHWS-P02 Grounding & Positioning Base, and MTL7760ac Zener Barrier are required.
Select either the YHSM-01S-AR (1-channel) or YHSM-04S-AR (4-channel) control module.
We confirm applicability and recommend solutions based on your target liquid and site conditions.
Setting the trusted standard for liquid leak detection in industrial facilities.