YD69 hall dual-channel sensor is installed on the shell of the measured machine.Inducting the raised
part or concave slots of the magnetizer.It shows the corresponding level, it is used to detect axis of
rotation speed, linear velocity.
The method to get the acceleration of the measured machine is by calculation processing.The sensor
has good low and high frequency characteristics. The low frequency is as low as 0Hz, can be used for
zero-speed measurement of rotating machinery, because the sensor can provide acertain phase of
two speed signals, so you can judge for CW or CCW; high frequency is as high as20KHz, can meet
the high-speed measurement requirements of vast majority of industrial field. It is contactless
measurement between the sensor and the measured gear, no wearing and easy installation.
The output waveform is square wave that duty cycle for about 50%.Hall Dual-Channel Sensor has
the features of great adaptability, wide speed range, wide temperature range and strong vibration
(The parameters of phase difference are the data when the speed gear modulus is 2, in line with
The measured machine need to be a magnetizer with raised parts or concave slots.
Suggestion: modulus: more than 1.7, the material need to be magnetic low-carbon steel.
P.S.: If the width of the raised part or concave slots is different from the width of the flat surface, the
waveform width will be affected.
Installation gap: 0.3-1 .5 mm, typical value is 1.0mm.
P.S.: Depends on the vibration of measured machine.
2. Output Characteristics
Frequency response characteristics: 0 ~ 20 kHz
Output channels: Double channel
Output waveform: square wave, rise and fall by time 12 u s + 40%
high level: U b-(1.8 V + 40%); low level: < 2.2 V
Pulse duty cycle: 50%u00b125%
Phase difference: 90u00b130u00b0
P.S.: Depends on the Installation and the rotation direction of rotating parts. This parameter is
suitable for the installation on the figure 4 of the manual.
Load capacity: u00b120mA (Maximum)
Output impedance: less than 47 Ohm
3. Work environment requirements
Working power supply: U b=15VDCu00b130% (8V~28V)
Current consumption: less than 35mA
Working temperature: -40 degree~125 degree (head)
Vibration resistance performance: vibration (10Hz ~ 2KHz) 30g, shock 100g
4. Electrical characteristics
Power source polarity protection: yes
Output short circuit protection: yes
Insulating strength: 1000V 50Hz,1min ( channel and shell)
5. External cable and connection
The wire attached: 6 u00d7 0.5mm2 shielded cable, standard length is 1.0 meter (can be extended
according to user's requirements)
Product Specification / Models
1. Speed measurement principle
When the speed gear rotates, the sensor will provide a frequency f(Hz)= nu00d7m/60 (n is the rotating
speed,p is the gear teeth) of the square wave signal, It can be used for the locomotive electronic
control systemto do sampling detection of locomotive speed and diesel engine speed.The inductor
need to be a magnetizer, can be groove, raised screw or toothed gear.There are several parameters
as follow for using the sensor to do detection:m -numbers of the inductors on the measured rotating
magnetizer.n -speed f -input signal frequency s-the set meter factor (depends on characteristics of
the speed measuring instruments, some speed measuring instruments set gear teeth directly,
please follow the manual of the speed measuring instrument you selected to set meter factor)
S=60/M n = s u00b4 f = 60 u00b4 f / m.After setting the induction numbers of measurement system, the setting
coefficient of the instrument can be made sure. According to the sensors in each channel that
corresponding induction numbers to determine the coefficient of each channel.
For example, as to the speed measurement of a rotation axis, there are 30 gear teeth on the axis, it
means the teeth numbers of induction Z = 30, then the output frequency of each channel f = (30/60)u00b4n,
rotating speed n = 2f, that means the measured frequency multiply 2 is equal to actual speed. Set the
coefficient of speed measuring instrument in 2, means s = 2, then the actual speed of rotor can be
displayed directly. Similarly, if every rotor produce 2 signals, then set the coefficient s = 30. Others
can be deduced by analogy.
2. CW/CCW discrimination measuring principle
Hall Dual-Channel sensor can discriminate CW run and CCW run easily.
According to the application example in specification 4 to install it, when it runs CW as figure 4, the
output wave of channel 1 is ahead of channel 2 90u00b0. Waveform diagram is as follow:
Installation, Usage and Fault handling
1. About SJ series Hall Dual-Channel Sensor, it is not allowed the working power supply connect with
locomotive battery, it should connect with isolated power supply to output
2. The sensor output wire must be connected with no mistake according to the specification, make
sure there is no short circuit and open circuit appears. Strictly prohibit pulse output and power supply
to be short circuit.
3. Install the sensor according to the instructions in the installation diagram. After adjust the gap
between the gear and head of sensor to 0.6mm, tighten it.
4. Before the sensor installed into the shell of measured machine, use a ferromagnetic contacts and
leaves the sensor, if the output current changes, it is normal.
5. In normal condition, if the output current no changes, the sensor is damaged.
6. If the wire is damaged by external force, the solution is to change a sensor.
Shanghai CeZhen Automation Instrument Co.,Ltd was set up in 2004. We offer a very wide variety of vibration, position, speed sensors or transmitters, each designed to handle the rigors of industrial environments and many capable of being installed in hazardous areas when appropriate I.S. barriers, galvanic isolation, or other means are used. When your needs fall outside our standard product offering, our custom products engineering capabilities may be able to modify an existing product, or develop an entirely new one, to meet your needs.
Our product widely applies in the national defense, aviation, petrochemical industry, electric power, railway, metallurgy, coal mine, tobacco, machinery, and other industries, direct users, covered in most of the enterprise. In recent years, the rapid development of international company with many overseas clients to establish a broad cooperation relations, the product has been sold to Europe, America, South America, Africa, Australia, south and southeast Asia, 30 countries and regions. At present the company technical service ability and the domestic and foreign market share in China as one of the same industry in China, is the vibration measurement technology application domain and a leading company in the field of product promotion.
We will continue keep the faith "the first credit , the first quality, the first service" to provide the satisfactory products for our customers. if you have any technology problem or needs, please send email for us, we will recall on time, we hope that the effort to get your approval.