OTC 3665 Phototach Contact Non-Contact Tachometer, Infrared Laser 5-Digit Display Kit

OTC 3665 Phototach Contact Non-Contact Tachometer, Infrared Laser 5-Digit Display Kit

• The OTC 3665 Phototach is a dual-mode RPM measurement kit that combines non-contact infrared tachometry with contact measurement using adapter tips, designed for automotive and mechanical diagnostic applications.
• Features:
  • Measures from 2 to 99,999 RPM in non-contact mode and 6 to 99,999 RPM in contact mode with autoranging
  • Infrared beam provides accurate readings unaffected by ambient light with zero torque loss
  • Laser pointer assists with precise targeting; reflective tape enables accurate measurements from 2 in to 20 in
  • Includes four contact adapter tips, min/max memory, 5-digit LCD display, and low battery indicator
• Includes:
  • Phototach main unit (Model 3665)
  • Four contact adapter tips (various styles)
  • Reflective tape for non-contact measurement
  • Carrying case
• Specifications:
  • Manufacturer: OTC (Bosch Automotive Service Solutions)
  • Part Number: 3665
  • Non-Contact RPM Range: 2-99,999 RPM (autoranging)
  • Contact RPM Range: 6-99,999 RPM
  • Display: 5-digit LCD with min/max memory and low battery indicator
  • Working Distance: 2-20 in
  • Application: Designed for automotive engine diagnostics and rotational speed measurement on shafts, pulleys, and other rotating components
• Also known as OTC 3665 Phototach Kit, OTC Dual-Mode Tachometer, OTC Infrared Tach Meter Kit, OTC Contact/Non-Contact Tachometer Set, or 3665 Phototach Measurement Kit.

OTC, under Bosch Automotive Service Solutions, provides the 3665 Phototach as a professional diagnostic tool combining contact and non-contact RPM measurement for flexible use in vehicle and machinery systems.

Q: What is the minimum non-contact RPM the instrument can measure?
A: It can measure as low as 2 RPM in non-contact mode.

Q: Are contact measurements supported?
A: Yes. With the included adapter tips, it supports contact measurement from 6 to 99,999 RPM.

Q: What is the effective range for non-contact measurements?
A: The reflective tape enables accurate readings from 2 in to 20 in.