tmilogo.gif (2200 bytes)Tension Measurement, inc.
Home Design Info Sensors Indicators Strap Meters Belt Meters P1000 Contact Us

TMI manufactures precision tension sensors with strain gage transducer load cells.  All sensors use full bridge 350 or 1000 ohm elements specifically designed for dynamic and static tension measurement.  These sensors are used for a broad range of industrial, laboratory and test applications.  The sensor body types shown here offer a wide variety of installation positioning options and capacities.  Most tension sensors can be provided with V-groove/U-groove and web type rollers.  Our competitive pricing structure allows the purchase of modified standard sensors and custom electronic systems at or near similar off-the-shelf prices with 2 - 4 week deliveries.  Call, fax or E-Mail our offices with the details of your application for instrument recommendations and pricing.

Shown below are the 8 major standard tension sensor body styles.  Within each style their are multiple sensor capacity options. Click on an image to go to the detail page for each sensor.  This page will detail the sensor dimensions, roller options and tension ranges available.  The sensor selection information below  will provide a quick overview of important considerations to use in determining the sensor type for your application. 


The tension sensor style options shown above are indicative of our standard models.  Most of these model types are available for a broad range of tension capacities.  The physical dimensions will be larger on the higher tension ranges. Please click on the model type photos above to go to more detailed pages with photos, dimensional drawings and specifications.

Sensor Range Selection
Some of the sensor range/full scale capacity considerations are:
                   - The min. & max. anticipated tension
                  - The break strength of your material
                  -  Does your material get tangled often
- The weight of the roller
- The precision of the sensor resolution required
- Material dimensions, gages, thickness, diameters, etc.
TMI application engineers will ask these questions before recommending a sensor range.  Typically the highest tension that you normally run should be 50% of the sensors rating.  This allows for spikes in tension that can occur. It also provides a robust sensor that will have a long life.  As an example, if you are spooling a filament that should be at 800 to 1000 grams tension, we would recommend at least a 2,000 gram capacity sensor.  If the break strength of the filament is 2,500 grams and can occasionally become tangled we would recommend a 3,000 gram sensor.  The goal is to provide a sensor that will survive your environment and still have good resolution.  Most sensors have a minimum 100% overload protection for occasional high spikes in tension.
Sensor Selection Information

The chart above lists TMI's standard sensor types with minimum and maximum tension range capabilities.
                                                           Click here for a printable PDF document

Tension Sensor Roller Options
A wide variety of rollers can be used on each of our sensor groups.  The most common types are V-groove, U-groove, Web rollers and Flanged Web rollers.  We manufacture many variations of these roller styles. Common roller material options include: Hard Anodized Aluminum, Delrin, Nylatron, Stainless Steel and Ceramic. We are frequently able to install your rollers where preferred.  The roller weight and size must be considered when selecting the best sensor style and full scale sensor range.  Please call our toll free number 800-470-3322 or 303-465-1011 to discuss roller options for your application.

Single Roller Sensor or 3-Roller Faceplate Sensor
TMI offers many of our sensors with 3 rollers mounted to a faceplate on the front of the sensor.  The center roller is attached to the tension sensor element and a fixed roller is placed on either side to create a 3-roller instrument.  Most sensors can be provided without the faceplate and used as a single roller sensor.  The fixed guide rollers needed are mounted to your machine frame and are typically existing rollers used to process your material. For more information click here.
Single Roller Sensor
3 Roller Faceplate

Sensors for Vacuum Environments
Most sensors can be provided to meet vacuum chamber requirements.  Please inform our application engineers of your vacuum environment requirements.

Unique Strain Gaged Transducer Applications
TMI has provided our customers with many Tension Sensors and Load Cells that have very specific design features. Many of our standard body styles can also be modified to meet your needs. Please call 1-800-470-3322 to discuss your design and application requirements.

Temperature Compatibility
 For long life, our durable standard transducer operating temperature range is -40°F (-40°C) to +180°F (+82°C). Optionally, higher temperature options of  -40°F (-40°C) to +232°F (+111°C) are available.

Basic application information required to properly select a Tension Sensor
          Minimum and maximum typical tensions to be applied to your material
         Wrap angle requirements (see technical docs for wrap angle explanation)
         Tensioned material diameter or thickness and width
          Line speeds
          Material bend radius limits
          Environmental considerations - Temperature, Vacuum, Fluids
          Mounting position or style - Cantilevered off or through machine wall, Bench, Table Top or  Pedestal mounted
          Physical space available for sensor
          Do you have rollers in place or do you prefer a 3 roller face plate

          If you will use your own roller, what does it weigh? This weight must be considered for range selection.

Digital Panel Meters, Displays, Amplifiers and Signal Conditioners
All TMI Strain Gaged Tension Transducers and Load Cells are full bridge 350 ohm or 1000 ohm sensors. They require an electronic signal conditioning module for strain gage sensors. This is typically a Digital Panel Meter with Display or Strain Gage Amplifier module. These units must provide the sensor's excitation voltage and be able to process the mV/V signal from the sensor. 
                                                   Click here for electronic indicator options.

All Sensors Manufactured in The USA

Tension Measurement, inc
P.O. Box 740755, Arvada, Colorado, U.S.A. 80006-0755
TEL. (303) 465-1011   FAX (303) 466-9761
Toll Free TEL. From USA and Canada: 800-470-3322

1998 Tension Measurement, inc.