Extech 461995 Combination Contact/Laser Photo Tachometer


Product Tags:
Extech 461995 Combination Contact/Laser Photo Tachometer This Tachometer provides contact/non-contact RPM and Linear Surface Speed measurements. The laser pointer beam provides accurate long distance measurements for photo tachometer measurements. 



  • Narrow beam Laser photo tachometer for accurate non-contact RPM measurements
  • Measurements from up to 6.5ft from the target for improved safety and accessibility
  • Unique display where characters reverse direction depending on measurement mode you are in
  • Large 0.4" (5 digit) LCD display
  • Microprocessor based with quartz crystal oscillator to maintain high accuracy
  • Tachometer memory stores last, max and min readings
  • Provides wide RPM (photo and contact) and
  • Linear Surface Speed (contact) measurements
  • Accurate to 0.05% with max resolution of 0.1rpm in either photo or contact mode
  • Complete with tips and wheel for rpm or linear surface speed, four 1.5V AA batteries, reflective tape and carrying case 
  • Maximum distance 6.5ft
Extech 461995 Tachometer Combination Contact/Laser Photo.

Combination Contact/Laser Photo Tachometer
Provides both contact (0. 5 to 19,999 rpm) and non-contact (10 to 99,999 rpm) RPM measurement functions for use in virtually all applications. Laser guided non-contact measurements up to 6.5 feet (2 meters) away for added safety and convenience.

Make non-contact RPM measurements of rotating objects by pointing the integral laser at the reflective tape placed on the object to be measured. Characters on the display reverse direction depending on contact or photo mode. The memory button holds last reading and recalls min/max readings display.

What is a Tachometer?
A tachometer is a device that measures the angular speed of a rotating shaft in terms of revolutions per minute (RPM). Also, a tachometer can measure linear speed in terms of feet per minute (feet/minute) or meters per minute.

How do Contact Tachometers Operate?
The sensor tip is placed in direct contact with the rotating object. After 2 seconds an accurate reading is displayed. Linear surface speed can also be measured by placing the edge of the wheel on the moving object.

How do Photo (Non-contact) Tachometers Operate?
First, a small piece of reflective tape (approximately 1/4-inch) is mounted on the object to be measured. Second, the light beam or laser is pointed at the revolving tape. The reflection from the tape provides a reading to be displayed and updated once per second. For the most accurate measurements, the distance between the tachometer and the reflective tape should be within 6 inches for a light beam and up to 6.5 feet for a laser. Fluorescent or bright ambient lights may interfere with the measurement.

Which Extech Tachometer Model Is the One for You?
A non-contact (photo) tachometer was designed for applications where it is not feasible to have the tachometer come in contact with the rotating device. This is the case in high-speed applications and/or where the object to be measured is not easily reached. A contact tachometer is also available for applications where direct contact of the tachometer with the object is preferred. You can also select a combination (contact/non-contact) tachometer for the maximum in flexibility.

461937 Reflective Tape for Photo Tachometers
For use with any brand Photo Tachometer. Place a piece of reflective tape on the object to be measured and point the tachometer's integral light beam at it. Ten reflective tape strips. Each strip measures 23 x 0.25 inches (584 x 6 mm).

Replacement Wheels for Contact Tachometer
Two sets of cone tip, flat tip, and spare wheel.

Click here for product datasheet


General Specifications
Circuit Custom one-chip LSI microprocessor circuit
Time base Quartz crystal 4.194 MHz
Display Reversible 5 digit 0.4" (10mm) LCD display
Laser light source Less than 1mW; Class 2 red laser diode (645nm approx.)
Detecting Distance 2 to 79" (50 to 2000 mm) depending on ambient light and RPM
Memory Last reading and MIN/MAX readings
Operating Conditions 32 °F to 122 °F (0 °C to 50 °C); RH 80% Max
Power Supply 4 x 1.5 V AA batteries
Power Consumption 20mA DC approx.
Weight 10.6oz. (300g) including battery)
Size 8.5 x 2.6 x 1.5" (210 x 67 x 38 mm)
Accessories (4)1.5V batteries, reflective tape 24" [600mm], surface speed/rpm rotating attachments, and carrying case
Range Specifications
Photo Tachometer 10 to 99,999 rpm
Contact Tachometer 0.5 to 19,999 rpm
Surface Speed 0.2 to 6560 ft/min
Surface Speed 0.05 to 1999.9 m/min
Sold Out
Product Images (click to enlarge)
  • Extech 461995 Combination Contact/Laser Photo Tachometer