Jiangsu, China
Business Type:
Trading Company
Business Range:
Electrical & Electronics, Textile
Main Products:
Year of Establishment:
Terms of Payment:
OEM/ODM Availability:
OEM/ODM Service
Sample Available
MEI Awards

Inductive Sensor, Gear Speed Sensor, Sensor manufacturer / supplier in China, offering Cylindrical M30 Proximity Gear Speed Sensor Rotary Detector Rd-III IP67 Inductive Sensor, M4 Laser Through Beam Photoelectric Sensor 10-36VDC Sn 20m Infrared Light Brass Nickel Plated Housing PVC Cable, M5 Laser Photoelectric Infrared Through Beam Sensor 10-36VDC PVC Cable Sn20m and so on.

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Supplier Homepage Products Speed sensor Others Speed sensor Cylindrical M30 Proximity Gear Speed Sensor Rotary Detector Rd-III IP67 Inductive Sensor

Cylindrical M30 Proximity Gear Speed Sensor Rotary Detector Rd-III IP67 Inductive Sensor

Min. Order / Reference FOB Price
1 Piece US $75-85/ Piece
Port: Nanjing, China
Production Capacity: 50000PCS/Year
Payment Terms: L/C, T/T, Western Union, Paypal
Type: Proximity Sensor
Principle: Hall
Wires: NPN (Three-Wires)
Standard: Standard
Application: Corridor
Certification: CE

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Basic Info.

Voltage Type
Protection Degree
Transport Package
Nanjing, Jiangsu, China
HS Code

Quick details:

1, 1 LED
2, Compact active speed sensor switch M30

3, Switching output and pulse output
4, flush mountable


Technical specifications:

Power supply: 220VAC ± 15%Weight: 0.5Kg
Load current: ≤5AProtection class: IP66
Insulation resistance: >500MΩDetection speed range: 1~200 rpm
Output signal: switch signalTrip time: 5 seconds
Ambient temperature: -20°C~+60°CResponse time: <2mS
Environmental humidity: ≤90%Detection spacing H2: ≤ 8mm
Dimensions: Φ38×115mmMinimum safe working distance H1: ≥20mm



RD-II rotary detector (commonly known as low speed switch, speed switch, also known as rotation sensor, slip protection device) patent number: ZL97207248.9. This product can effectively and timely handle the electrical and mechanical faults such as stall, spin, overload, slow turn, belt slippage, drive chain (band) fall off, drive shaft breakage, etc. that often appear in motors and mechanical transmission devices. Can play a role in ensuring production and maintenance of equipment.
Second, product use
Widely used in steel, electricity, chemical, cement, coal, metallurgy, building materials, mining, port terminals, grain warehouses and other industries using conveyor equipment.

Working principle:

The RD-II rotation detector is installed next to the driven shaft and is equipped with a detection plate (see Figure 1). When the motor is running, the driven shaft is driven to rotate by the transmission device, and the detection piece on the driven shaft is also rotated. The rotation detector receives the even interval pulse signal of the detection piece. At this moment, the rotation detector is in the closed state, and the AC contactor is sucked by connecting the self-protection contact of the intermediate relay (see FIG. 3). The main contact of the AC contactor is closed. Turn the motor. When the equipment is stuck, locked rotor, belt slipping, transmission belt off failure, the drive shaft will be slow or stop, at this time the test piece will also slowly turn or stop, RD-II type rotation detector will not receive Evenly spaced pulse signals to the detection plate. In the specified period of time (5 seconds), no rotation signal is received. The rotation detector will be turned from closed to open, the intermediate relay will be disconnected, the AC contactor will be disconnected and shut down in time, and reliable protection equipment (this product will receive the test piece) The rotation signal has nothing to do with the size of the motor.


Simple and practical structure, stable and reliable performance
·Dustproof, shockproof, moistureproof
Small size, light weight, long life
Output signals can be used interlocked with field devices and can also be sent to the microcomputer control system
High cost performance, easy installation, maintenance-free
·Especially suitable for places with poor production environment

Compact speed monitor M12




Sensing range 2 mm 

flush mountable

Q:  What's your warranty ? How about the quality of your sensors ?
A: 18  mouths .
  We have the certification of ISO,CE,CCC.Our sensors can replace many famous brand sensors(BALLUFF,IFM,P+F,TURCK,OMRON,SICK,Contrinex,Schneider,KEYENCE,
BANNER,BAUMER,AUTONICS,etc) You can provide us the date sheet and we check whether can produce.
Q:  Do you have different style ?
A: We produce our own brand sensor(KJT),also provide OEM + ODM service.
Q:  How can we become your sale distributor ?
A: If you can sell our products USD 5,000 to USD 60,000 per year,you could be one of our distributors in your city or area.We have price protection policy in every area.
 We still looking for more distributors,do you like to join us?
Q:  Can we have our logo or company name to be printed on your products or the package ?
A:  Yes,you can.Logo or imprints can be printed on our products.
The minimum quantity is 500 pcs per logo.You can send us the artwork by email in JPEG or TIFF format.If you want your logo and company name to be printed on the package for the products(custom design package).Such as gift box and paper card,the MOQ is 500 pcs per model.You can send us the artwork by email in JPG/TIF/AI/EPS/TIFF or coreIDraw formats
Q:  How about the delivery time ?
A:  We are factory and we have large warehouse for goods,if we have the sensors you need in stock,we will send in 3 days.If have not in stock,we will produce asap after received your payment in our account.the detailed delivery time is according your order qty.
Q: Does KJT keeps goods in stock or only trading ?
A: We have large warehouse for goods. Keep lots of goods in warehouse, so could promise fast delivery.
Q: What's your shipment method?
A: We ship by Express, by air, by sea, by train. Normally we checked and compare, then provide customer the most proper shipment method.
Q: What's about MOQ?
A: First order MOQ=5 pcs (different type sensor has different MOQ)
Q: If i want to release order, what's the payment method you accept ?
A: We accept T/T, Paypal, Western union, L/C.
Q: If i want to release order, what's the process?
A: Thanks. You can send inquiry to us or send us by email, we will reply within 12 hrs.
Q: Could KJT provide technology support?
A:  We're in this field more than 10 years. If there's any problem, please contact with us,we'll provide suggestion from our engineer to help you solve problem.
Q:When you use KJT's photoelectric sensor and inductive proximity sensor, the following subject should be noticed: 
A: Ensure the working voltage is 10-30 V DC or 90-250 AC.
Required the sensing distance and the material of detecting objects.
For photoelectric sensor ensure it is available through beam and reflection.
Ensure it is NPN or PNP output.

Q:  How can i get a sample ?
A: If you need one sample for checking-up,we will provide one free sample for one type sensor(same data sheet) for you, .but we do not carry the freight charge.If we have no this type sample in stock,we could produce it for you.


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