Bearing-less torque transducer with completely separate transmission to stator.
The latest technology Datum Electronics Series RS420 non-contact rotary torque transducers have been designed to fit easily in line with any drivetrain or test bed using either a spline or keyway shaft. We are able to modify the ends of the transducer to best suit your requirements, and can even design bespoke ends to fit. This type of transducer has many advantages over other torque systems including high speed and high torque applications.
The RS420 torque transducer utilises a strain gauged shaft for accurate and reliable torque measurement and a set of rotating on shaft conditioning electronics, the digital signals are transmitted to the non-rotating part of the system or stator providing a reliable and highly accurate torque measurement solution.
The RS420 Torque Transducer Range The RS420 series torque transducer is not limited by bearings; therefore it can be used at higher speeds, and places no bearings loads on to the shaft. The stator needs to be mounted in relation to the shaft within an operating envelope of +/- 3 to 5mm. The standard range can measure torque ranges from 0Nm up to 10kNm, the same modular elements have been applied to bespoke torque transducers for use down as low as 1Nm and up to 500kNm.
RS420 Rotary Torque Transducer Specifications
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| RS420 SERIES |
Size 1 |
Size 2 |
Size 3 |
Size 4 |
| TORQUE RANGE |
0-100Nm |
0-500Nm |
0-2,000Nm |
0-10,000Nm |
| ACCURACY CLASS |
0.1%FSD |
0.1%FSD |
0.1%FSD |
0.1%FSD |
MECHANICAL
CONNECTION |
Keyway or Spline Shaft |
SIGNAL OUTPUT
(Available) |
DIGITAL: RS232 data via USB Port
ANALOGUE: 0-10V or 4-20mA |
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| TRANSMISSION |
Strain gauge signal, digital on-shaft
with inductive loop |
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| MAX SPEED (RPM) |
22,000rpm |
16,000rpm |
10,000rpm |
6,000rpm |
| OUTPUT SPEED |
100-20,000sps |
The Competitive Edge
The Series RS420 transmits calibrated digital data as this is a cleaner and more defined method of transmitting data. The on-shaft signal from the strain gauge is converted to a digital signal and amplified on shaft. It is this signal that is taken off the shaft and processed by either an indicator or by TorqueLog, providing the end user with clean and definitive data transmission.
Instrumentation The Series RS420 transducer is compatible with Datum’s full range of torque indicators (Type 300 torque indicator, Type 310TSP portable torque, speed & power indicator, Type 370 (torque, speed and power indicator) via a serial port connection between the transducer and indicator.
Click here for full instrumentation details A popular option is to view data from the transducer on a PC or laptop for torque data analysis. Our TorqueLog software has been developed to allow the user to view the torque data in real time with optional data analysis for performance monitoring and control. Using a simple USB interface, the transducer data can be displayed and logged at the touch of a button with TorqueLog.
Analogue Options If an analogue signal is required, our Series 420 torque transducers are able to provide either 4-20mA or 0-10VDC output by converting the digital data signal from the torque transducer to an analogue signal. However, the effect of external or electrical noise can impact upon signal strength and definition in this instance. Other commercial applications may use slip rings or analogue signals to transmit data, but the Datum Electronics series 420 outputs digital as standard.
If your requirements dictate anything above our standard torque sensor range of 10,000Nm we can and have engineered torque measurement transducers up to 500,000Nm.
Data Sheet RS420
Data Sheet (Adobe Reader required)