The RTM 2000 Series are hollow flanged style reaction torquemeters available in ranges from 60 lbf-in to 100,000 lbf-in.
Reaction torque measurements permit accurate determination of static and dynamic torque with a stationary or non-rotating transducer. They are based on Newton’s third law of angular motion, which states, “when a body exerts a torque upon another body, the second exerts an equal torque upon the first in the opposite direction and about the same axis of rotation.”
The illustration below shows how a hollow reaction torquemeter is used to measure the output torque of an air tool. The torquemeter will accurately measure the instantaneous tool output torque even though it rises rapidly as the fastener seats.
All Himmelstein Reaction Torquemeters use temperature compensated full foil gage torque bridge sensors that provide inherent cancellation of bending and thrust signals. The hollow reaction series utilizes a patented double wall construction that provides unusual isolation and high torsional stiffness in a compact mechanical package.
350 ohms, except 700 ohms for Models 2050 thru 2070
1.5 mV/V, except 1 mV/V for Models 2010 thru 2050
Nonlinearity (% of full scale)
Nonrepeatability (% of full scale)
Hysteresis (% of full scale)
±0.1, except ±0.25 for Models 2010 thru 2070
Zero (% of full scale/deg F.)
Span (% of reading/deg F.)
+75 to +175 deg F.
Usable Temperature Range
-65 to +225 deg F.
10V (ac or dc)