Omega Products HHT21A User Manual
Laser Tachometer
Extended Warranty
Program
SM
HHT20A Series
Starts at
$
350
Standard
⻬ Convenient
Pistol-Grip Design
⻬ Safe, Non-Contact
Operation to 3 m (10')
and 45° from Target
⻬ Auto-Ranging
5 to 100,000 rpm
⻬ Accuracy and
Resolution: ±1 rpm
⻬ 6-Digit LCD
⻬ Remote Sensor Available
⻬ Low-Battery and
On-Target Indicators
⻬ Last Measurement
Memory
The HHT21A combines the accuracy
and safety of a non-contact 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 internal laser
optics and can be used with a
remote optical sensor. It can be
handheld or mounted with the 1⁄4-20
threaded bushing in the base of
the handle.
Specifications
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:
bushing in handle
Temperature: 5 to 40°C
(41 to 104°F)
1
⁄4-20 UNC mounting
OMEGACARESMextended warranty program
HHT21A, $350,
shown smaller
than actual size.
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)
Size: 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)
is available for models shown on this page.
Ask your sales representative for full details
when placing an order. OMEGACARE
covers parts, labor and equivalent loaners.
To Order (Specify Model Number)
Model No. Price Description
HHT21A $350 Tachometer with LCD
HHT21A-R-KIT* 640 Tachometer with LCD, remote sensor,
Accessories
HHT-ROS-CABLE $50 7.6 m (25') extension cable for remote sensor
HHT-RT-5 13 Reflective tape, 1.5 m x 1.3 mm roll (5' x 1⁄2")
HHT21A comes with operator’s manual, 4 “AA” alkaline batteries, nylon case,
NIST-traceable calibration certificate and 1.5 m (5') of reflective tape. The HHT21A-R-KIT
comes with operator’s manual, 4 Ni-Cad batteries, recharger, rugged case, 1.5 m (5') of
reflective tape, and remote optical sensor with mounting bracket and 2.4 m (8') of cable.
* Add “-230V” to order with 230 Vac recharger; add $10 to price.
Ordering Example: HHT21A-R-KIT, tachometer with LCD, remote sensor, recharger and
NIST calibration certificate, $640. OCW-3, OMEGACARESMextends 1-year warranty to a total
of 4 years ($160), $640 + 160 = $800.
Q-51
HHT21A, $350, with nylon
case (included), shown
smaller than actual size.
SM
AVAILABLE FOR FAST DELIVERY!
recharger
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