Magnetic Sensors Corporation

Analog Variable Reluctance (VR) Speed Sensors - Passive Sensors. Require no outside power source. The sensor generates a sinusoidal output voltage proportional to target speed and air gap. Analog signal is generated in response to fluctuation in magnetic field resulting from interruption by ferrous targets. VR sensors have the capacity to measure very high speeds, high reliability, long life, and economy. Can be configured for use in very high temperatures.

Effective target speeds range from 20 inches per second (IPS) to several hundred IPS, indicated by signal frequency and/or voltage. The output voltage, depending on air gap and the target surface speed, ranges from a few millivolts at the slowest target surface speed to several volts at the highest target speed as depicted graphically on the catalog data sheets.

RDP Electrosense Inc. manufactures custom linear position sensors and switches, variable reluctance to match your specifications.

Often called "gear tooth sensors" or "passive sensors," VR sensors offer great versatility and the capacity to measure very high speeds. Available in all standard configurations and sizes from .110" dia. barrel-type to 3/4" threaded. Metric from 12mm to 22mm.

Specified for high reliability, long life, simple installation, and economy. Can be configured for very high temperatures.

The Validyne DP45 is a low pressure differential variable reluctance sensor available in full scale ranges as low as +/-0.9 In H2O. The sensing diaphragm of the DP45 may be changed by the user to measure full scale pressures as high as 12 psid. Using a companion Validyne carrier demodulator, the DP45 output can be calibrated by the user to +/-10 Vdc over its full scale range.

The DP45 is used extensively in applications involving pulmonary research where fast dynamic response is needed to rapidly changing low pressures. The low sensor cavity volume and inductive sensing technology provide superior dynamic response and high stability during ambient temperature changes.

All surfaces inside the DP45 are made from corrosion resistant stainless steel.

Macro Sensors' HSIR 750 Series of 3/4 inch (19 mm) diameter Loop Powered LVDTs are designed for a wide range of position measurement applications. These are rugged hermetically sealed sensors, constructed entirely of stainless steel, and intended for general industrial use. The coil windings are sealed against hostile environments. The radial connector offers two important benefits. First, it results in a through-bore design, which permits access to either or both ends of the LVDT's core for better mechanical support and core guidance, and easier cleanout in dusty or dirty locations. The second advantage of the radial connector is shorter installed length compared to units of the same range with axial connectors.

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General Specifications

Unit Specifications

Mechanical Drawing & Wiring Diagram

Ordering Information

Tech Bulletin

Electronics Options - Available I/O Configurations

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Use the links below for additional information, specs and datasheets for our other

Loop Powered LVDT's:

GHSI Series LVDT Position Sensors

The Macro Sensors GHSI 750 Series of 3/4 inch diameter spring-loaded, loop powered LVDTs are designed for a wide range of position measurement and dimensional gaging applications. These rugged hermetically sealed sensors are constructed entirely of stainless steel and intended for general industrial use... [read more]

GHSIR Series 2-Wire Loop Powered 4-20 mA Position Transmitters

The Macro Sensors GHSIR 750 Series of 3/4 inch diameter spring-loaded, loop-powered LVDTs are designed for a wide range of position monitoring, feedback, and dimensional gaging applications. These rugged hermetically sealed sensors are constructed entirely of stainless steel and intended for general industrial use. ... [read more]

GHSIR-A Series Air-Extend/Spring-Retract 4-20 mA Position Transmitters

The Macro Sensors GHSIR 750-A Series of 3/4 inch diameter air-extend/spring-retract, loop powered LVDTs are designed for a wide range of cycled position monitoring, feedback, and automated dimensional gaging applications where it is necessary or desirable to move the probe out of the way between readings. These rugged hermetically sealed sensors are constructed entirely of stainless steel and intended for ... [read more]

HSI Series LVDT Position Sensors

The Macro Sensors HSI 750 Series LVDT of loop powered 4-20 mA sourcing LVDT position transmitters is offered in measuring ranges of 1 to 10 inches (25 to 250 mm) to provide reliable, contactless position monitoring and feedback of control valves and servo actuators. They are rugged and robust devices constructed entirely of TIG-welded stainless steel and hermetically sealed ... [read more]

HSIR Series LVDT Position Sensors

The Macro Sensors HSIR 750 Series of 3/4 inch diameter, loop powered 4-20 mA LVDT position transmitters is designed for a wide range of position monitoring and feedback applications. These rugged, hermetically sealed sensors are constructed entirely of stainless steel, and intended for general industrial use. The coil windings are sealed against hostile environments to IEC standard IP-68 and ... [read more]

SI Series LVDT Position Sensors

The SI 750 Series of 3/4 inch diameter, loop powered 4-20 mA LVDT position transmitters is designed for a wide range of position monitoring and feedback applications. Their exceptional reliability is a result of manufacturing processes and assembly techniques developed and optimized by Macro Sensors over many years of manufacturing LVDT sensors.... [read more]

About

Macro Sensors:

Macro Sensors founded by Howard A. Schaevitz has more than three hundred man-years of experience in just one thing, the design and manufacture of LVDTs. Our Core belief is that you need solutions, not simply products. So when you call them you get the benefit of their experience and their commitment.

Most products listed on our website are in stock for immediate delivery, and we strive to offer the finest customer service in the industry: technical support from people who understand LVDTs and how to apply them to your benefit, and a commitment to excellent pricing, quality products , and deliver what you can truly rely on. Macro Sensors also has a comprehensive network of representatives and distributors in the U.S. and around the world to provide you with local support.

Of course, if your requirement is not covered on our website, please call us. We manufacture an enormous array of LVDTs, from modified standards to complete custom designs.

Often referred to as Gear Tooth Sensors because they record the movement of ferrous targets, typically gear teeth, passing through a magnetic field. Magnetic Sensors Corporation offers four basic types of gear tooth sensors:

Analog Variable Reluctance (VR) Speed Sensors - Passive Sensors. Require no outside power source. Respond to collapse of magnetic field caused be interruption by ferrous gear teeth. VR sensors have the capacity to measure very high speeds, high reliability, long life, and economy. Can be configured for use in very high temperatures.

Digital Variable Reluctance (DVR) Speed Sensors - Active Sensors. On-board electronics condition sine wave output to produce a digital, square wave signal.

Hall Effect Speed (HE)Sensors - Active Sensors. Zero speed, non-contact sensors measure magnetic field distortion, providing precise measurements of movement as slow as zero IPS.

Quadrature Speed & Direction Sensors - Active Sensors. Hall effect sensors with separate output to measure rotation or linear surface speed and direction.

MSC Speed Sensors are available in all standard configurations, sizes from .150 barrel-type to 3/4". Metric from 12mm to 22mm.