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Medium-Voltage Current & Voltage Sensors for Smart Grid & Power Distribution

Yihe Electric specializes in the development and manufacture of medium-voltage electrical equipment and sensing components for power distribution, protection, monitoring and grid automation applications. With integrated capabilities covering product design, tooling, insulation component manufacturing, precision processing and equipment assembly, we support utility, industrial and energy projects with application-specific electrical solutions. Our manufacturing and quality-control processes are focused on dimensional consistency, electrical performance and reliable operation under demanding field conditions.

Capacitive Voltage Transducer
The Capacitive Voltage Transducer is a medium and high voltage sensing device designed based on the capacitive voltage divider principle. It is specially developed for voltage measurement, protection

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Resistive Pressure Transducer
The Resistive Pressure Transducer is a high-precision pressure sensing device based on resistive strain technology. It is mainly used for pressure monitoring and control of power switchgear,

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AC Current Transducer
The AC Current Transducer is a high-precision current sensing device specially designed for AC current collection in power systems. It can monitor the current magnitude of distribution lines in real

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Piezoelectric Vibration Transducer
The Piezoelectric Vibration Transducer is a vibration state sensing device based on the piezoelectric effect principle. It is mainly used for vibration monitoring and mechanical fault diagnosis of

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Modular Combination Transducer
The Modular Combination Transducer is a multi-parameter combined sensing device designed with a modular architecture. It can freely combine various sensing modules such as voltage, current,

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Electric Current Transducer
The Electric Current Transducer is a high-performance core component for power measurement and protection, developed in strict accordance with the State Grid’s technical specifications for primary

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High Voltage Transducer
This high voltage transducer strictly adheres to the State Grid’s technical specifications for primary and secondary integrated equipment and is designed and manufactured in full compliance with the

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Combination Sensor
The ZW32 Combination Sensor strictly adheres to the State Grid’s technical specifications for primary and secondary integrated equipment and is designed and manufactured in full compliance with the

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Product Range

Inductive Proximity Sensors

Cylindrical (M8 to M30) and rectangular housings utilizing eddy current technology for non-contact metallic target detection.

Photoelectric Sensors

Through-beam, retro-reflective, and diffuse-reflective variants featuring visible red or infrared LEDs for precise object positioning.

Capacitive Sensors

Adjustable sensitivity units built for detecting liquids, powders, granules, and non-conductive solid materials through container walls.

Industrial Pressure Sensors

Piezoresistive sensing cells with integrated digital displays for pneumatic, hydraulic, and coolant line pressure monitoring.

Key Features

IP67 / IP69K Enclosure Protection

Laser-welded stainless steel housings and molded PVC/PUR cable assemblies withstand high-pressure washdowns and coolants.

Integrated Circuit Protection

Built-in reverse polarity, short-circuit, and transient voltage suppression prevent field failure during electrical surges.

High Switching Frequency

Fast response times down to 0.5 ms support high-speed sorting and packaging machinery.

IO-Link Communication Ready

Select models support bidirectional data transmission for remote parameterization, diagnostics, and predictive maintenance.

Technical Parameters

Type	Housing / Thread	Sensing Range / Rating	Output Type	Protection Class
Inductive Proximity	Nickel-Plated Brass / M12	4 mm (Flush)	PNP / NPN (NO+NC)	IP67
Inductive Proximity	304 Stainless Steel / M18	8 mm (Flush)	Push-Pull / IO-Link	IP68 / IP69K
Diffuse Photoelectric	ABS / M18 Cylindrical	100–400 mm adjustable	NPN / PNP (Selectable)	IP67
Capacitive Level	PTFE / M30 Thread	1–25 mm adjustable	PNP NO	IP67
Electronic Pressure	316L SS / 1/4" NPT	0–40 bar	4–20 mA + 2 × PNP	IP65

Applications

Automotive Assembly: Weld-field immune inductive sensors monitoring robotic gripper position and part clamping status.

Packaging Machinery: High-speed photoelectric sensors tracking carton registration marks on continuous conveyor lines.

Material Handling: Capacitive sensors detecting plastic container fill levels in high-speed bottling plants.

CNC Machine Tools: Coolant-resistant proximity switches verifying hydraulic chuck clamping and tool carousel indexing.

Engineering & Customization

Custom Cable Assemblies

Tailored cable lengths, PUR jacket materials, and pre-wired M8/M12 connector pinouts.

Housing Modification

Specific thread pitches, body lengths (short-body variants), and alternative housing metals (Titanium or PTFE-coated brass) for aggressive chemical environments.

Electrical Profiling

Customized switching hysteresis, analog output scaling, and specialized protocol integrations.

Manufacturing & Quality Control

Automated SMT Placement

Surface-mount circuit boards assembled via high-precision pick-and-place lines ensuring solder joint integrity under vibration.

Epoxy Potting

Internal electronics fully encapsulated in thermal-conductive polyurethane resin to eliminate moisture ingress and shock displacement.

Functional Testing

100% automated test bench verification for switching distance, hysteresis, voltage drop, and dielectric strength (500 V AC).

Compliance Verification

CE, RoHS, and UL-listed component traceability matched against strict quality assurance protocols.

Our Certificate

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FAQ

Q: What is the difference between shielded (flush) and unshielded (non-flush) inductive sensors?

A: Shielded sensors feature a metal ring around the active face, directing the electromagnetic field forward. This allows them to be embedded flush into metal mountings without false triggering, though with a slightly shorter sensing range. Unshielded sensors lack this shielding, providing a wider, longer sensing range but requiring a metal-free clearance zone around the tip.

Q: Are your sensors immune to electromagnetic interference (EMI) from nearby variable frequency drives (VFDs)?

A: Yes. All inductive and photoelectric units incorporate internal shielding and filters compliant with IEC 60947-5-2 EMC standards, preventing false switching when installed near VFD cables or servo motors.

Q: Can these sensors operate directly in harsh cutting fluids or machine coolants?

A: Sensors utilizing 304/316L stainless steel housings and IP68/IP69K ratings withstand continuous immersion in water-glycol, synthetic, and oil-based machining coolants without housing degradation.

Q: What output configurations are available for PLC integration?

A: Units are available in standard 3-wire DC (NPN or PNP with Normally Open or Normally Closed configurations) as well as 4-wire complementary outputs and IO-Link smart sensor variants.

Q: What is the typical lead time for standard versus customized sensor orders?

A: Standard catalog items ship within 3 to 5 business days. Custom cable configurations, specialized housings, or unique electrical parameters typically require 15 to 25 business days for production and calibration.

Q: Do you provide 3D CAD models and electrical wiring diagrams for engineering integration?

A: Yes. STEP files, dimensioned technical drawings, and wiring schematics are available for download across all product series to support mechanical and electrical design workflows.

As one of the most professional sensor manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy high-grade sensor made in China here from our factory. Customized orders are welcome.

sensor, High Voltage Transducer, Combination Sensor