KJT Two - channel gear speed sensor switch series
Application characteristics
The sensor has no contact with the gear under test, no wear and tear, and is easy to install. The output waveform is square wave with duty ratio of about 50%.
The sensor has good low-frequency and high-frequency characteristics.The low frequency can be up to 0Hz, which can be used to measure the zero speed of rotating machinery. Since the sensor can give the speed signal of two paths with a certain phase difference, it can be used to distinguish positive and negative rotation.The high frequency can be as high as 20KHz, which can meet the high speed measurement requirements of most industrial fields.
Product introduce
| Operating voltage |
Ub=15VDC±30% (8V~28V) |
| Current consumption |
≤35mA |
| Operating temperature |
-40ºC~125ºC(head) |
| Vibration resistance |
vibration(10Hz~2KHz)30g,impact100g |
| leakproofness |
IP68 |
| Power polarity protection |
YES |
| Output short-circuit protection |
YES |
| dielectric strength |
1000V 50Hz,1min(Channels and shells) |
The reverse speed sensor is used to detect the rotation speed and linear speed of the wheel shaft,the speed of the measured body can also be obtained by calculation.
Wide speed range, wide temperature adaptation, strong vibration resistance, power polarity protection and output short circuit protection.
Technical Parameters
- Sensor installation
(1)The measured sensor is a magnetizer with teeth or grooves.
Suggestion: the modulus of gear is greater than or equal to 1.7, and the material is magnetic low carbon steel.
Note: the difference between the width of non-standard teeth or slots and the flat surface will result in the change of wave-to-width ratio.
(2)Mounting clearance: 0.5-2mm, typical value: 1.0mm
Note: depends on the vibration of the part under test
2.Sensor output characteristics
Frequency response characteristic: 0~20kHz
Output channel number: double channel
Output waveform: square wave, up and down along time 12 plus or minus 40%
Output amplitude: high level: u-0.7 (U: supply voltage), low level: < 0.1v
Pulse duty ratio: 50% plus or minus 25%
Phase difference: 90 + 30 ° the first channel (advanced)
Note: this parameter is applicable to the installation mode given in FIG. 4 of this manual, depending on the installation mode and rotation direction of the rotating part.
Load capacity: + / - 20mA (maximum)
Low output impedance: < 47 Ω
Enclosure material: stainless steel 304 (other materials can be used as required by the user)
3.External cable and connection
Sensor outfitting cable output definition
| Wire color |
Definition |
| Brown |
Power supply+24V |
| Black |
COM |
| Blue |
OUT |
| Purple |
OUT |
| Outer layer |
Shield layer |
Note: subject to the actual wire mark
Working principle
1.Principle of speed measurement
When the rotate speed measuring gear rotates, the sensor will generate square wave signal of frequency f (Hz) = n xm /60(n is the speed and P is the number of teeth of gears) for the electronic control system of the locomotive to sample and detect the locomotive speed and diesel engine speed.
The inductor must be a magnetizer, either a notch or a raised screw or gear.
The sensor is applied to measure the speed, which involves the following parameters:
M -- the number of sensors on the rotating magnet
N -- rotate speed
F -- input signal frequency
S - the set instrument coefficient (depends on the characteristics of the rotating speed measuring instrument, part of the rotating speed measuring instrument directly sets the number of teeth, please select the instrument coefficient according to the selected rotating speed measuring instrument operating instructions)
The relationship is as follows: S=
N = s, f = 60, f/m
After determining the number of sensors in a measurement system, the instrument setting coefficient is determined, and the coefficients of each channel are determined according to the number of sensors in each channel.
For example, if the rotation speed is measured on a rotating shaft, there is a 30 tooth wheel on the shaft, which is equal to the number of tooth number of the sensor Z = 30, then the frequency output of each channel of the sensor is f = (30/60)n, and the rotation speed is n = 2f, that is, the measured frequency must be multiplied by 2 to be equal to the actual speed.Set the speed measurement instrument coefficient at 2, that is, s = 2, then the actual speed of the rotor can be displayed directly.Similarly, if two signals are produced per revolution, the coefficient s = 30 can be set, and so on.
3.Principle of positive and negative judgment measurement
The application of hall two - channel sensor can be easily used to distinguish positive and negative rotation.
According to the example applied in this instruction 4, when the rotation direction is defined as positive rotation as shown in figure 4, the output waveform is channel 1 leading channel 2 90 degrees, and the waveform is shown as follows:
When the rotation direction is opposite to that shown in figure 4, the waveform of channel 2 will lead the waveform of channel 1 to 90 degrees. The waveform diagram is as follows:
It can be seen from the above figure that the phase identification of the waveform of channel 1 and channel 2 can be conducted to identify the positive and negative rotation.
Q: What's your warranty ? How about the quality of your sensors ?
A: 18 months .
We have the certification of CE,RoHS.Our sensors can replace many famous brand sensors(BALLUFF,IFM,P+F,TURCK,OMRON,SICK,Contrinex,,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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