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  Home > Intrinsically Safe > Tachometers >

Advent Laser Optical/Contact Tachometers
Advent Laser Optical/Contact Tachometers
ET-2109 explosion proof tachometer is certified EEx ia IIC T4 - ATEX II 2 G to allow for use in a wide range of hazardous environments including petrochemical, Gas & volatile materials processing industries.

The ET-2109LSR is not certified for use in Mines.

Measuring Range
3.0 - 99,999 rpm
0.3 - 1,500.0 Meters or Yards/min


  • Certified for use in Hazzardous Areas (EEx ia IIC T4 - ATEX II 2 G rating)
  • Digital LCD display with 180 inversion capability
  • Includes factory calibration certificate
  • Memory holds last reading for 1 minute

ET-2109LSR Intrinsically Safe Tachometer kitComplete Kit:

The ET-2109 is supplied as a complete kit with the tachometer, reflective tape, contact adapter, calibration certificate, instruction manual, 4xAAA batteries all in a hard plastic carrying case.

Combination Contact Adapter/Surface speed & length Adapter Included.

Measuring Range 3.0 - 99,999 rpm
0.3 - 1,500.0 Meters or Yards/min
(4,500 ft/min) or seconds
Resolution .001 rpm
Accuracy 0.05% 1 digit
Optical Sensing Range 2 - 80" / 50 - 2000mm
Update Time 0.8 sec
Capture Mode
0.1 sec
Count 0-99999 revs or length in linear
Time interval
0-99999 seconds (auto)
Memory Hold
Holds last reading for 1 minute
On Target Indicator
Housing Material
High Flow ABS - Metalised
Batteries 4xAAA supplied
Dimensions 21 L x 4 W x 3.5 D - cm
Measuring Wheel Included, 0.1 meter circumference
Weight (kit) 0.4 kg
Warranty 1 year
Sensing Distance
1 meter (39 inches)
Battery Life 6 hours continuous (shorter when using rechargeable type
Display Update Rate 0.8 seconds/update (0.1 sec for Max Value capture)

Item# Item Name Starts at $749.00 Qty Add
ELE-A2109-LSR Advent Laser Tachometer
ELE-A2109-LSR-002 Advent Laser Tachometer with Pulse Output
Check the items you wish to purchase, then click


A2109-LED Model
Light source Red LED
Range 100 - 1000mm
Angle +/- 45 deg.
A2109-LSR Model
Light source Laser class II
Range 100 - 2000mm
Angle +/- 80 deg.
Wavelength 655nm
Power ouput 1mw
Download ATEX Certificate

Accessories for this product...
1x7 inch Reflective Tape for DT-205 and DT-207
Our Price: $5.00

Reflective Tab Sheet (35 1/2" x 1/2") for PLT-5000
Our Price: $5.00


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Intrinsically Safe > Tachometers
Reliability Direct, Inc.
900 W. Main Street
Ephrata, PA 17522
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