This product is discontinued / Replaced by CT-6700 Digital Engine Tachometer (Click here)

Photo (CT-6520 Universal Engine Tachometer)



The CT-6520B universal engine tachometer enables direct reading of signal from 0.5 to 199.5 P/R in r/min-unit. The analog output helps to grasp an overall trend and see fluctuation by connecting to a recording device such as a pen recorder or other display devices.

Since the circuit is originally designed to change signal into the amount of analogs after multiplying the input signal and making it a fixed pulse train, the CT-6520B can perform high precision measurement with high tolerance for noise.


  • Even low pulse signals can be read directly in r/min-unit.

  • Easy to read by large LED

  • Three types of output (digital, analog and pulse) as standard

  • 2 ways of power operation ; AC (ranging 100 to 240 VAC) and 12 VDC (ranging 11 to 15 VDC)

Overview Specification

Applicable detector (option) IP-292, IP-296, IP-3000A, IP-3100, VP-202, VP-1220, OM-1500, OM-1200, MP-9100, MP-981, LG-916, TTL signal output detector
Measurement range 400 to 20,000 r/min (depending on a detector)
Input pulse switching 0.5 to 199.5 P/R (in 0.5 P/R steps, depending on a detector)
Display 5-digit green LED display (max. indication up to 20,000 r/min)
Measurement time Every 1s
Display accuracy ±0.02 %/F.S. ± 1 digit in the range of 400 to 20,000 r/min
Input connecter BNC connecter and R03-PB6M connector
Pulse output 1 P/R, 60 P/R (un-synced to the input signal) and wave-shaped output of the input signal (receptacle connector type: BNC), TTL level, fanout2
Digital output 5-digit BCD, TTL level (receptacle connector type: 57-30500)
Analog output Voltage output: 0 to 10V/0 to 20,000 r/min
Load resistance: 1 kΩ or more (receptacle connector: BNC)
*Modification (0 to 2 V/0 to 20,000 r/min) is available as an option.

<when modified>
Current output 0 to 20 mA/0 to 20,000 r/min
Load resistance 100 Ω or less

Note: The voltage output is eliminated when the current output is provided.

Contact output Running detection: 1 to 99 × 100r/min
Overrun: 1 to 199 × 100r/min
Comparison interval: Every 100ms

<Transfer contact>
Contact capacity: Load resistance AC 240 V/2 A, DC 30 V/2 A

Power for detector 12 ± 0.6 VDC(100 mA)
Outer dimensions 210 (W) × 99 (H) × 300 (D) mm
Weight Approx. 3 kg
Operating temperature range 0 to +40°C
Power requirement 100 to 240 VAC ± 10%, 50/60 Hz, approx.30 W, 11 to 15 VDC approx. 25 W
Option CT-0020 panel mounting fixture





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