Reaction Torque Sensors

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Reaction Torque Sensors

Reaction torque sensors measure torque on a stationary flange. The sensor is bolted between a fixed frame and the device under test, so it reads static or reaction torque at zero rpm, with no slip rings. Stiff and repeatable, they are the standard choice for torque-wrench calibration and motor or fastener bench tests. Pick by torque range and mounting below.

Choosing a reaction torque sensor

Match the sensor to your torque range and how you mount it. If the torque is on a continuously turning shaft, use a rotary torque sensor instead.

Series	Torque range	Mounting style	Best for
56 micro flange	0.1 to 20 N·m	Miniature flange	OEM and tight-space assembly
120 keyed shaft	30 to 150 N·m	Keyed shaft	Torque-wrench and motor benches
8050 hollow flange	50 to 1,000 N·m	Thin hollow disc	Hollow, disc or drilling joints
2150 dual range	20 to 5,000 N·m	Dual-range flange	Wide and fine range in one unit
WTQ-9500	50 to 1,000 N·m	Disc flange	Low-profile inline reaction
MRT	0.1 to 20 N·m	Compact dual flange	Micro, tight-space, OEM-embedded
WTQ-120	5 to 200 N·m	Keyed shaft, in-line	Holding / stall torque on a shaft
WTQ-2150	20/500 to 150/4000 N·m	Dual-range flange	Fine low range + wide high range
WTQ98 series	0.2 N·m-50 kN·m	Static	Flange both ends, mV/V
WTQ-32	5-500 N·m	Static	Square drive + flange, mV/V
WTQ-22 series	50 N·m-10 kN·m	Static	Key/square + flange, mV/V
WTQ17 series	0.2 N·m-5 kN·m	Static	Key both ends, mV/V
WTQ-12	0.1-3 N·m	Static	Compact, mV/V
WTQ11A	0.2-100 N·m	Static	Key + flange, mV/V
WTQ11B	0.2-50 N·m	Static	Key + flange, mV/V

Measuring torque on a spinning shaft? See rotary torque sensors.

FAQ

What is a reaction torque sensor used for?

It measures static torque on a stationary flange, so it is the standard tool for torque-wrench and screwdriver calibration, electric-motor and gear-motor bench tests, and fastener studies. Nothing rotates, so the signal leaves on a plain cable at zero rpm.

Reaction or rotary: which do I need?

Choose reaction when the torque is on a fixed flange and nothing spins, and rotary when the torque is on a continuously turning shaft. Reaction suits calibration and bench work; rotary suits running motors, engines and gearboxes.

What torque range and mounting do these cover?

The series spans 0.1 N·m to 5,000 N·m in flange-to-flange, keyed-shaft and square-drive styles, most with mechanical overload protection. Tell us the fixture and range and we match the build.

Request a quote

Tell us the torque range, the mounting style and the test, and we recommend a reaction torque sensor and send a quote.