Product Overview pdf

Applications

Speed Monitors

Speed Sensors

Quotes, Questions

How to Purchase

Outside of North America?
See rheintacho.com

Home

OEM Speed Sensors
RheinTacho manufactures high quality non-contact speed sensors designed for all applications including those where the sensor is exposed to temperature extremes and high pressures. Our sensors are popular in many OEM applications such as ship diesel engines, construction, mining, and railway equipment where ordinary speed sensors would quickly fail.
Contact Us today for your OEM requirements! See our applications pages!
SH Series Hall Effect Sensors
Hall Effect pdf Brochure
Series Housings Material Protection Max PSI Temperature Range
SHN9 M14x1x40 PES 30% GF IP65 none –13 to 185°F (–25 to 85°C)
SHN11 M14x1x60, M14x1x80, M14x1x120 Brass IP67, IP69K 70 –40 to 257°F (–40 to 125°C)
SHx10 M16x1.5x45, M18x1,5x50 303 SS IP69K 290 –40 to 257°F (–40 to 125°C)
SHx10 5/8"x60mm, 3/4"x60mm 303 SS IP67, IP69K 290 –40 to 257°F (–40 to 125°C)
SHx7 M16x1.5x45, M18x1.5x50, 303 SS IP67 290 –40 to 257°F (–40 to 125°C)
SHx7 M18x1x45, M18x1x60, M18x1.5x85 Brass IP 67 290 –40 to 257°F (–40 to 125°C)
Hall effect sensorsSpecifications
Output: Square wave, PNP or NPN
Air Gap: 1 to 3.5 mm typical
Frequency Range: 0 to 15,000 Hz
Connections: M12, CA-com, bayonette, Sure-Seal, AMP
Cables: Consult factory

The Hall sensor detects the movement of ferromagnetic materials such as gear teeth. The tooth of a gear wheel moving in and out of the magnetic field of the sensor influences this magnetic field in different degrees. The sensor element measures the change of the Hall voltage. This allows the changes in the magnetic field to be converted into an electric variable, reflecting the rotational movement of the gearwheel after the appropriate filtering and conditioning of the output signal.

Hall sensors are suitable for the non-contact rotational speed detection of small gearwheels at high resolution. Type SH rotational speed sensors are found in the most varied applications in general machine construction, in vehicles and in mobile operating machines and in hydraulic drives.

SD Series Differential Hall Effect Sensors
Differential Hall Effect pdf Brochure
Series Housings Material Air Gap mm Freq. Range Max PSI Power
SDNxFC Flange Brass 1 to 2.5 0.1-20,000 Hz 218 7-30 VDC
SDNxFA Flange Brass/PA6 GF30 0.3 to 2.5 0.1-20,000 Hz 145 8-32 VDC
SDx2 M12x1x50 303 SS 1 to 3.3 0.5-20,000 Hz 290 10-36 VDC
SDx2 M18x1x50 303 SS 1 to 3.3 0.5-20,000 Hz 290 10-36 VDC
SDx2 M18x1.5x50 303 SS 1 to 3.3 0.5-20,000 Hz 290 10-36 VDC
SDx0 M18x1x40 X12CrNiS18 8 0.3 to 2.5 2-20,000 Hz 145 8-36 VDC
SDx1 M18x1x40 X12CrNiS18 8 0.3 to 2.5 2-20,000 Hz 145 8-36 VDC
SDx2x03 M12x1x24 SS 1.4305 1 to 3.3 0.5-25,000 Hz 3200-7250 10-36 VDC
Specificationsrheintacho differential hall effect sensors
Output: Dual phase square wave, PNP or NPN,
SDx0: Two NPN or two PNP,
SDx1: Frequency + 1 direction
Temp. Range: –40 to 257°F (–40 to 125°C),
SDNxFA: –40 to 320°F (–40 to 160°C)
Protection: IP69K,
SDx0, SDx1: IP68
Connections: M12, CA-com, bayonette, Sure-Seal, AMP
Cables: Consult factory

In the differential Hall sensor, two Hall generators are arranged close to each other. The individual Hall generators operate along the same principle as the magnetic field dependent semi-conductor in single Hall sensors. Both Hall elements of the sensor are biased with a permanent magnet. The sensor detects the movement of ferromagnetic materials such as gear teeth. If one element is faced with a ferro-magnetic tooth and the other with a gap, the result is a one-sided amplification of the induction. The difference developed between both elements changes the polarity as soon as the gearwheel moves. These changes are evaluated filtered and digitized for the output stage.

Differential Hall sensors are designed specially for the rotational speed detection in machines and equipment where an extremely high resolution is required in a wide frequency range. When properly installed, differential Hall sensors allow greater installation distance than Hall sensors even at low frequencies.

SM Series Magnetoresistive Sensors
Magnetoresistive pdf Brochure
rheintacho magnetoresistive sensorsSpecifications
Output: Square wave, PNP or NPN
Air Gap: 0.4 to 1.9 mm typical
Temp. Range: –40 to 257°F (–40 to 125°C)
Frequency Range: 0-25,000 Hz
Power: 10-36 VDC
Housing Sizes: M14x1x90, M12x1x50, M18x1.5x50
Material: Nickel plated brass
Protection: IP67 or IP68 depending on model
Connections: M12, Sure-Seal
Cables: Consult factory

Magnetoresistive sensor elements are magnetically controllable resistors. The sensor element is often designed with 4 magnetic field sensitive resistors interconnected to form a measuring bridge. The measuring bridge is energized by a bridge voltage. The sensor element is biased with a permanent magnet. A magnetic field influences each of the bridge resistors differently depending on their angle. This causes a voltage difference that is then amplified and evaluated.

The sensor detects the movement of ferromagnetic materials such as gear teeth. A tooth or a gap moving past the sensor changes the magnetic field. This causes changes in the internal bridge resistance values. The changes are converted into a square-wave output signal which reflects the changes in the magnetic field. Magnetoresistive sensors are sensitive to changes in the external magnetic fields. For this reason the sensed objects should not have different degrees of magnetization.

Magnetoresistive sensors are designed specially for rotational speed and zero speed detection. Magnetoresistive sensors are also capable of detecting high frequencies and finer gear teeth. Unlike Hall sensors, magnetoresistive sensors are not limited by a lower frequencies, provided that the sensors are properly installed.

SIS Series Magnetic Inductive Sensors
Magnetic Inductive pdf Brochure
rheintacho magnetic resistive sensorsSpecifications
Output: Sinusoidal
Air Gap: 0.5 mm typical
Temp. Range: –13 to185°F (–25 to 85°C),
–13 to 248°F (–25 to 120°C) with cable or CA-com plug
Frequency Range: 50-30,000 Hz
Power: Sefl-powered
Housing Sizes: M16x1,5x45, M18x1,5x50,
M18x1x65, M18x1x85, M18x1,5x58, M18x1,5x55,
M18x1,5x50, M18x1,5x85
Material: Zinc plated steel
Protection: IP67
Pressure: 210 psi max with M16x1.5x45 or M18x1.5x50 housings.
others not for pressurized applications
Connections: M12, CA-com
Cables: Consult factory

Magneto inductive sensors are particularly suitable for the rotational speed detection at high revolutions in combustion engines and fast-running gears. The sensors can be used in mobile operating machines and utility vehicles. Magneto inductive sensors are also suitable for the rotational speed detection in hydraulic drives. The sensor tip consists of a pressure-resistant membrane made of a special alloy and is capable of sensing a ferromagnetic gearwheel inside a hydraulic drive or an oil-filled gearbox. The magneto inductive sensors can also be used in mobile operating machines. Magneto inductive sensors comprises a coil, a coil core and a permanent magnet. Coil core and magnet are magnetically coupled. This generates a permanent magnetic flow inside the coil. A ferro-magnetic substance which influences the field of the magnet can cause changes in the magnetic flow. This change in flow induces a voltage inside the coil. The magnitude of the induced voltage depends on the magnitude and speed of the change n flow.

The sensor is designed such that the magnetic field exits through the housing at the tip of the sensor. If ferro-magnetic material moves at an adequate speed past a close distance from the sensor tip, a voltage is induced inside the coil. The movement of a ferro-magnetic material and the resulting change in the magnetic field are converted by this sensor into an electric signal. The magnitude of the induced voltage depends on the speed of movement and is supplied directly as a sinusoidal output signal. The frequency of the output voltage corresponds to the frequency of change of the magnetic flow and is therefore proportional to the rotational speed of the gearwheel.

Normally the frequency in magneto-inductive sensors is also analysed as directly proportional to the speed. Unlike digital sensors which are supplied externally, the output voltage in these sensors depends on the circumferential velocity of the sensed object, the sensing distance, the structure of the sensed object (module of the gearwheel) and the external circuit elements (load resistor). These factors must be taken into account when designing the trigger threshold for the input circuitry in signal processing.

SO Series Inductive Oscillatory Sensors
Inductive oscillatory pdf Brochure
rheintacho industive oscillatory sensorsSpecifications
Output: Square wave, NPN or PNP options
Air Gap: 2-8 mm typical depending on version
Temp. Range: –13 to158°F (–25 to 70°C)
Frequency Range: 0-3,000 Hz with M12x1x40,
0-2,000 Hz with M18x1x55
Power: 10-35 VDC
Housing Sizes: M12x1x40 or M18x1x55
Material: Chrome-plated brass
Protection: IP67
Pressure: Not for pressurized applications
Connections: Cable or M12 plug
Cables: Consult factory

Oscillatory sensors comprise a high frequency oscillator which includes a coil and a capacitor. The coil is wound around a core open to one side. It is within this open side that the alternating field generated by the coil can be influenced. If a metallic object is placed or moves near the coil face, induction causes eddy currents or demagnetization. This also causes energy to be drawn from the field and the resonant circuit to be attenuated. The oscillation amplitude in the oscillator circuit thus becomes smaller.

Inductive oscillatory sensors are suitable for rotational speed and zero-speed detection in normal industrial environments. They allow detection of keyways, bolts, screw heads and similar shaft-mounted objects and where only one or a few pulses per revolution can be detected.