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Belt Tension Meter - Type 13

If your are cold climate testing in the Arctic Circle or maintaining a battalion of armoured fighting vehicles like some of our customers then the only meter to choose is the Type 13 SR.

Capable of operating between a temperature range of -40 to +80 degrees Centigrade and fully submersible down to a depth of 15 metres (50 feet) this meter will survive the most arduous of conditions.  The housing is CNC machined from aluminium billet and features extensive neoprene rubber gaskets to ensure that the electronics package is completely sealed from the external environment.  The sensor head is a specially adapted CLAVIS optical sensor head.

An LED display with a 25mm character height enables the belt frequency to be read even though the display may be covered by frost or snow.  A rapid charger is included, to recharge the batteries in 3 hours.  The charger may use either a 110/230 VAC mains supply or the 12 volt vehicle battery via the accessory socket.  This meter is also suitable for the most hostile of production environments.  The only control is a single heavy duty on/off button which can be operated by gloved hands.

Every CLAVIS meter is supplied with a precision mechanical resonator (tuning fork) for simple calibration validation by the user.  If you have additional calibration requirements CLAVIS can supply a Sonic Calibration Meter.  Read more about calibration...

You can expect each device to have the following;

  • CLAVIS Patented Sensor
  • Carrying Case
  • Tuning Fork (Checking Calibration)
  • Calibration Certification
  • Battery Charger
  • Rechargeable Batteries

The Optical sensor head uses an invisible infrared beam to detect vibrations of the belt.  A narrow angle orange LED generated beam is provided to guide the aiming of the sensor.  The very best signal from the belt is seen when the sensor is held perpendicular to the belt at the centre of the span at 9.5 mm (3/8 in) distance.

Technical Specifications

Measurement Range
Frequency Range 10 to 600Hz
Measurement Accuracy
Below 100Hz +/- 1 significant digit
Above 100Hz +/- 1%
Environment Conditions
Operating Temperature -40℃ to +80℃
-40℉ to +176℉
Shipment & Storage Temperature -60℃ to +100℃
-76℉ to +212℉
Protection Class IP54
Type Infrared Optical
IR Wavelength 970mm
Visible Aiming Beam Narrow angle orange LED
Housing Machined aluminium
Cable length 1m
Power Supply
Battery Type AA (1.5V) Alkaline only
Number 4
Expected life 20 hrs
Compartment Location Back of meter
Optional Rechargeable Batteries
Battery Type AA (1300 mAh minimum)
Charger 12 to 15 V DC output
Socket/polarity 3.5mm positive centre


Enquiry Form

Thank you for your interest in CLAVIS.  Please use this form if you have any questions about our products and we'll get back to as soon as we can, or call us on + 44 (191) 262 7869.

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