Easy Thrust Torque (ETT)

• One sensor design with three (3) sizes for valve stems from 0.75” to 8” in diameter
• One-way connection preventing torque/thrust mix-up thereby reducing error
• Better high end accuracy than most other torque/thrust transducers
• Supports ASSIST^TM  technology for automatic recognition with VOTES® Infinity

The Easy Torque-Thrust^TM (ETT) Sensor is a stem-mounted torque and thrust sensor.  The ETT Sensor measures stem torque and/or thrust in the open and closed direction for the entire length of the valve stem stroke and can be used on a verity of stem diameters and materials.

The ETT Sensor uses a single cable that attaches directly to the Diagnostic System with a Votes-to-Diagnostic Systems cable.

The ETT Sensor has built in bridges and connectors, strapped on a stem with a tie wrap that serves as a permanent-retaining band. The ETT Sensor contains strain gages attached to a carrier, which in turn is bonded to the stem. The carrier produces a slight attenuation (strain attenuation factor, SAF) compared to directly bonded gages. The SAF is automatically accounted for by all Crane diagnostic software (refer to the ETT User Manual, ETT-UM-03, for additional information).

The ETT Sensor contains two pre-wired bridges: a full torque bridge and a half thrust bridge with passive completion resistors. In order to calculate the sensitivity for the torque and thrust gages, the following material and geometric properties of the stem are required:

A carefully selected adhesive, which does not contain chemicals known to result in damage to plant component (e.g. halogens) is used to attach the gages to the stem.  A “foreign material friendly” tie wrap is used to secure the ETT to the stem during and after installation.

1. Young’s Modulus (E) in psi.
2. Poisson’s Ratio (v)
3. Stem Diameter (D)

If you have any questions relating to the ETT Sensor or any accessory you may need, please reach out to us.  Information on our contact page provides you with the specific contact information.