SENSORS & SENSING SYSTEMS PRODUCTS
NEW WIRELESS TORQUE TECHNOLOGY
Sensor Technology has launched a new range of non-contact torque sensors based on a full four element strain gauge bridge design. Designated the
TorqSense SGR510/520 series, the new units have a 250% overrange reading capacity,
allowing sudden spikes in torque to be measured and recorded accurately. The design compensates for any extraneous forces, such as bending moments applied to the sensor, improves sensitivity and has a wide temperature tolerance. The bridge is essentially four strain gauges glued onto the shaft that
is to be monitored in a square formation set at 45deg to the axis of rotation. When torque is applied to the shaft two gauges are stretched into tension and two go into compression. A rotor mounted ultra-miniature microcontroller, powered by an
inductive coil, measures the differential values in each strain gauge and transmits them back to the stator digitally, via the same coil. The SGR510/520 series transducers then use state of the art strain gauge signal conditioning techniques to provide a high bandwidth, low-cost torque measuring solution with high overrange and overload capabilities. TorqSense SGR510/520 has significant advantages over conventional
torque sensors, eliminating the sort of noise pickup and signal corruption associated with slip ring and other analogue methods of transferring torque data from rotor to stator, the company explains.
Sensor Technology
www.sensors.co.uk/ds0221 SENSOR RANGE EXTENDED
New component lines have been added to Variohm EuroSensor’s range following Variohm Holding’s acquisition of Phoenix America. This includes magnetically actuated speed and proximity measurement
sensors comprising separate solid-state sensor housings and high density magnetic target components. The speed sensors provide a digital on/off output derived from a tight magnetic tolerance around a zero Gauss level that provides a 50% ‘duty cycle’ that can be used to determine rotational speed on motors or other rotating equipment. Proximity sensors also utilise Phoenix America’s proven magnetic technology as solid-state or passive reed-switch devices for positional sensing for datum (home) or limit (end of travel) sensing. For both speed and proximity sensor types, a wide variety of
housing designs provide installation flexibility between the sensing and target elements, with a choice of linear or angular orientation. Sensor housings range from thermoplastic moulded flat disc designs complete with mounting holes, integral wiring and connectors, to threaded barrel types with integrated connectors in thermoplastic or nickel plated brass, complete with locking nuts. The magnetic target components for speed sensing are available in a variety of designs as solid thermoplastic encapsulated magnet discs with radial or face mounted magnets.
Variohm EuroSensor
www.variohm.com DESIGN SOLUTIONS | FEBRUARY 2021 29
LASER DISTANCE SENSOR MEASURES ACCURATELY EVEN ON DIFFICULT SURFACES
New from Micro-Epsilon, the compact optoNCDT ILR2250-100 laser distance sensor measures accurately even on difficult surfaces such as dark, structured or weakly reflecting objects. Smaller and more accurate than its predecessor, the sensor has a range up to 100m, although adding a reflector to the target extends this to 150m. The factory default AUTO measurement mode allows precise and reliable
measurements to be made on targets over great distances. Additional modes are also available to tune the sensor to specific application requirements. The sensor provides excellent repeatability (<300µm), resolution (0.1mm) and
linearity (< ±1mm), resulting in extremely stable measurements and excellent signal stability. With its IP65 die cast aluminium housing, it is suitable for a wide range of applications – from transport, logistics and conveyor systems, to automation, metal processing, production monitoring and unmanned drones or vehicles. It has already found uses in monitoring large coil diameters, silo filling levels and gantry cranes. The combined long range and high accuracy of the sensor has also found particular benefits in the measurement and control of diameters for hot ring rolling. The optoNCDT ILR2250-
100 can provide continuous measurement output via a 16-bit, scalable, 4-20mA analogue output or via RS422 serial communication. Three digital switch outputs are available for simple process monitoring and a trigger input provides opportunities to control when the sensor takes a reading.
Micro-Epsilon
www.micro-epsilon.co.uk/sensors
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