Inductive, Capacitive & Photoelectric Sensors — Direct from the Manufacturer
When a sensor fails mid-shift, your line waits on the replacement — not on a trading company's next reply. ZM Electric manufactures inductive, capacitive, photoelectric and analog-output (4–20 mA) sensors on our own production lines in Yueqing, China. You deal directly with the factory: quotes in 24 hours, consistent quality from first sample to five-hundredth batch, and engineers who answer with numbers.
Product Families
Buying the wrong family costs you more than the sensor — it costs a reorder cycle and a stopped machine. Start from what your machine must detect: metal takes inductive, plastic or liquid takes capacitive, transparent or far targets take photoelectric, and a position number takes 4–20 mA. Every model ships with a metric datasheet, so the numbers go straight into your own spec sheet.
Inductive Proximity Sensors
M8–M30 cylindrical and block forms, 1–80 mm range, NPN / PNP / two-wire outputs, IP67.
Capacitive Proximity Sensors
Plastic and threaded metal housings for non-metal targets and level detection.
Photoelectric Sensors
Diffuse, retro-reflective and through-beam types, detection up to 50 m.
Analog-Output Sensors (4–20 mA)
Linear transmitters wired straight into PLC and DCS analog input cards.
Hall Sensors & Magnetic Pickups
Gear-tooth and rotational speed detection for drives and engines.
Reed Sensors & Reed Switches
Glass reed contacts for position, level and door applications.
Linear Displacement Sensors
Rod-type position feedback with analog and digital interfaces.
Color-Mark Sensors
Print registration and label detection on fast-moving webs.
Safety Light Curtains
Hand and finger protection for press and robot cells.
Solid State Relays
Panel and DIN-rail SSRs for heater and motor switching.
Not sure which family fits your application? Send us your target material, mounting space and PLC input type — an engineer, not a salesperson, replies within 24 hours.
Who You're Buying From
ZM Electric is a Yueqing-based sensor manufacturer since 2010, operating self-owned factory floors in Beibaixiang Town, Yueqing, Zhejiang. The site runs an ISO 9001 quality system and CE-certified product lines for inductive, capacitive, photoelectric and analog-output sensors.
Every batch is electrically tested before packing, and every order ships with metric datasheets that state repeat precision, voltage tolerance and protection rating. Reverse-connection, surge and load short-circuit protection are built into the three-wire DC families as standard.
Factory floor · Assembly lines · Testing & aging benches · Outgoing packing
Made in Yueqing, China · Exported to 30+ countries across Europe, Southeast Asia, the Middle East and South America.
Do not take our word for it — ask us for the ISO 9001 certificate and a live video walk of the factory floor before you commit. Verification should cost you nothing.
What You Stop Worrying About When You Source from ZM
Paying for middlemen — Factory-Direct Pricing
Every layer between you and the factory adds margin you never see. You buy from the plant that assembles and tests your sensor — nothing sits inside your BOM but the product.
Sample good, batch drifting — Batch Consistency
You have probably had a perfect sample followed by a bulk order that does not match it. Here, the same repeat precision, voltage tolerance and IP67 protection hold from your first piece to your five-hundredth batch.
Custom refused, or MOQ'd into the ground — Flexible Customization
When your machine needs a different cable length, connector, output type or housing, you should not have to buy 1,000 pieces to get it. Custom builds run in 7–10 days.
Salespeople who cannot read a datasheet — Engineer-to-Engineer Answers
You stop re-explaining your application to someone who just forwards it. Your questions come back with numbers, from the people who build the sensor.
Where Our Sensors Work
Matched by principle — pick the family that fits the target, the environment and the PLC input you already have.
Packaging & Filling Lines
Capacitive sensors for level checks, color-mark sensors for print registration.
CNC & Machine Tools
Inductive switches for tool positioning, zero-point reference and door interlocks.
Assembly & Robotics
M8 / M12 inductive sensors plus 4–20 mA transmitters for position feedback.
Conveyors & Material Handling
Diffuse and through-beam photoelectric sensors for counting and jam detection.
Textile & Wire Machinery
Hall sensors and magnetic pickups for rotational speed and thread break monitoring.
Tanks & Silos
Capacitive and reed-float sensors for point-level monitoring.
Featured Products
Three datasheet-backed parts most requested by overseas buyers. Ask for the price of the exact spec you need.
ALJ12-4 Inductive Proximity Sensor
Stocking three variants of the same M12 switch because your PLC inputs differ? The ALJ12-4's full NPN / PNP / two-wire matrix lets you standardize one part number per mechanical size — fewer SKUs, faster replacement.
View specs & ask priceASN04 Inductive Proximity Sensor
Machining adapter blocks to fit cylindrical sensors into flat pockets wastes shop hours on every retrofit. The ASN04 bolts straight into an 18 × 18 mm pocket — no adapters, no rework.
View specs & ask priceAE3F-DS50 Photoelectric Sensor
An inductive switch cannot see transparent film or cartons — and when it misses, the jam is found by the sound of the machine stopping. The AE3F-DS50 covers 10–50 cm with no reflector to align.
View specs & ask priceEvery card opens the full datasheet — and you can send the inquiry with the model pre-filled in one click.
Frequently Asked Questions
How do I know whether I need an NPN or PNP sensor output?
Check the model code, confirm the wiring convention, then meter the signal wire under load — the full procedure is in our NPN vs PNP guide.
Inductive or capacitive — which sensor fits my target?
Magnetic metal targets take an inductive sensor; plastic, glass, granules and liquids take a capacitive one. The four-step selection method is in our Sensor Selection Guide.
What can a capacitive sensor detect, and at what distance?
Conductors and dielectrics — metal, plastic, paper, granules and liquids — with family-specific ranges covered flush or non-flush. Details are in our Capacitive Sensor Application Guide.
Which devices pair with a 4–20 mA analog-output sensor?
Any controller that needs a position number instead of an on/off edge — press and cylinder positioning, gap and thickness monitoring, PLC analog input cards. Wiring and noise tips are in our Analog-Output Sensor Interface Guide.
Can I order a sample before committing to volume?
Tell us the model, variant and quantity you need. We confirm sample availability, cost and lead time within 24 hours, before you commit to any volume.
How fast will my order ship?
You get a quote within 24 hours. In-stock items ship in 24 hours; custom builds in 7–10 days.
Get a Factory Quote in 24 Hours
Your line should not wait three days for a price. Send your target size, output type (NPN / PNP / two-wire / 4–20 mA) and quantity — within 24 hours you have a datasheet-backed recommendation and FOB pricing from the factory floor, not from a trading desk.
Quotes within 24 h · In-stock items ship in 24 h · Custom builds 7–10 days