HHT20A Series

Laser Tachometer | HHT20A Series

Laser Tachometer

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  • Convenient Pistol Grip Design
  • Safe Non-Contact Operation to 3 m (10') and 45° from Target
  • Autoranging 5 to 100,000 RPM
  • Accuracy & Resolution ±1 RPM
  • Available with Remote Sensor
  • Low Battery and On-Target Indicators
  • Last Measurement Memory
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The HHT21A combines the accuracy and safety of a noncontact laser tachometer with the convenience and ease of operation of a pistol grip instrument. Simply aim the tachometer at a reflective tape target on the rotating object, squeeze the trigger, and read the RPM. The HHT21 has both internal laser optics and the ability to be used with a remote optical sensor. It may be handheld or mounted utilizing the ¼-20 threaded bushing in the base of the handle.

Range: 5 to 100,000 rpm
Accuracy: ±1 rpm
Resolution: 1 rpm
Display: 6-digit, 13 mm (0.5") high LCD
Operating Envelope: Up to 3 m (10') and 45° from reflective target
Power-On Switch: Pistol-grip trigger; can be locked on with latching pushbutton for long-duration measurements
Power: 4 "AA" alkaline batteries (included); optional Ni-Cads can be charged while in tachometer
Battery Life: 6 to 8 hours typical
Dimensions: 82.5 x 44.5 x 155.7 mm plus 120.6 mm handle (3.25 x 1.75 x 6.13" plus 4.75" handle)
Weight: 0.56 kg (1.25 lb)
Mounting: ¼-20 UNC mounting bushing in handle
Temperature: 5 to 40°C (41 to 104°F)
Humidity: Maximum RH 80% for temperatures up to 31°C (88°F), decreasing linearly to 50% RH at 40°C (104°F)
Display Update Rate: 2/s
Recharger (Optional): 115 or 230 Vac, 7.8 Vdc at 50 mA max

Remote Optical Sensor (Optional)
74 L x 15 mm OD (2.90 L x 0.62"); M16 threaded tube, 2.4 m (8') cable 51 x 51 x 20 mm (2 x 2 x 0.8") mounting bracket with 2 M16 jam nuts
Power: 5 Vdc @ 30 mA (powered from base unit)
Temperature: -10 to 80°C (15 to 180°F)
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