HT-6100 Handheld Digital Tachometers From ONO SOKKI

HT-6100, Handheld, Digital, Tachometers, ONO SOKKIHT-6100, Handheld, Digital, Tachometers, ONO SOKKI

HT-6100 is a handheld tachometer , which the measurement and displaying portion are combined with built-in batteries and is designed to measure the revolution of the gasoline engine and generating rotating objects. Combined with optional detectors such as model IP-292, IP-296, IP-3000A, IP-3100, OM-1200 and TTL signal depending on the measurement objects or purpose, the revolution measurement is possible. The max. 20 measurement data can be stored internally by memory function which is convenient for later checking.

Several measurement items such as revolution (r/min, r/s), accumulated revolution (Counter), period (ms) are available by HT-6100 and both analogue (which can be switched over to monitor also) and pulse output function are provided as standard. Analogue output signal can be used for the recording the signal from data recorder and so on. Monitoring output signal can be used for checking the sensor’s detection waveform or as the input signal by FFT analyzer. Pulse output signal can be used as external clock signal for tracking analysis by FFT analyzer.

Measurement is impossible depending on the model of the engine. Please consult us the nearest distributor when you try the measurement of the engine, which has no record of the measurement in the past



  • Can be used with various sensors

    The HT-6100 can be used with the optional IP-292, IP-296, IP-3000A, IP-3100 and OM-1200 detectors, as well as with TTL signal output detectors.
  • Three outputs—analog, monitor and pulse—provided as standard

    Use the analog output function to record the number of rotations, the monitor output function to check the sensor’s detection waveform, and the pulse output function to output rotation synchronization signals.
  • Built-in peak hold function

    The maximum and minimum values can be displayed during measurement.
  • Large LCD with backlight

    (Character height: 10.2 mm)
  • Built-in memory function 20 data (MAX) can be saved to memory.

  • Can be mounted on a tripod

    The tachometer can be fixed to a tripod for continuous measurement.


Measurement method

HT-6100, Handheld, Digital, Tachometers, ONO SOKKI


Specifications Summary

Applicable engines ■ Gasoline and diesel engines
■ General rotating objects
Compatible detectors
  • IP-292/296 Ignition pulse detector
  • IP-3000A/3100 Ignition pulse detector
  • OM-1200 Ignition pulse detector
  • TTL signal output detectors
Object of measurement Ignition coil, primary/secondary ignition cables, ECU rotation pulses (5-V)
Calculation method Cycle calculation method
Measurement time Within 1 s + the time required for one cycle
Display 5-digit LCD, with backlight (character height: 10.2 mm)
Display update time 1 ± 0.2 s
Measurement units r/min (when the IP-292, IP-296, IP-3000A, IP-3100 or OM-1200 detector has been selected)
r/min, r/s, m/min, ms, COUNT (when a TTL signal output detector has been selected)
Measurement ranges  
  IP-292, IP-296, IP-3000A, IP-3100  OM-1200 TTL signal output detector
r/min 120 to 20000 100 to 99999
r/s - 1.66 to 99999
m/min - 0.3  to  99999
COUNT - 0  to 99999
ms - 0.6 to 300.0

*The number of pulses per rotation (0.5 to 200.0 P/R) is freely selectable.

Measurement accuracy Displayed value* x (±0.02%) ±1 count
* The displayed value is the count value excluding figures after the decimal point.

The measurement accuracy of the line speed depends on the rotational (r/min) accuracy.

Peak hold function Maximum value (MAX), minimum value (MIN)
Memory function 20 data (MAX)
Over-range function The over-range alarm (ERROR mark) is displayed when the measured value exceeds the display range.
Rotation upper limit alarm function The upper limit alarm ( ↑ mark) is displayed when the number of rotations exceeds the preset upper limit value.
Line speed calculation function Calculates the line speed from the preset diameter value (mm) and the measured number of rotations
Accumulating function Provides a cumulative count of the input signal pulses
Cycle measurement function Measures the input pulse cycle
(however, when the cycle is less than 1 s, measures the mean value of the input pulses)
Trigger level adjustment function A rotary dial at the right-hand side of the device is used to adjust the trigger level.
Analog output Output with respect to the displayed rotation values

Output voltage: 0 to 1 V/0 to FS (FS is freely selectable)
Conversion method: 10-bit D/A conversion
Linearity: ±1%/FS
Output update time: Within 50 ms + the time required for 1 cycle
Temperature stability: ±0.05%/FS/°C (span & zero)
Setting error: ±0.5%/FS
Load resistance: At least 100 kΩ

Monitor output Analog output for monitoring purposes after waveform reshaping of the sensor signal

Load resistance: At least 100 kΩ

Pulse output 1 pulse output per signal detection

Output voltage: Hi level: At least +4.5 V. Lo level: Up to +0.5 V
Output logic: Positive logic
Load resistance: At least 100 kΩ

Power source Four AAA alkaline batteries or exclusive AC adapter (PB-7080, Option)
Battery life At least 16 hours (when the backlight is OFF)
At least 8 hours (when the backlight is ON)
Low battery alarm indicator A low battery alarm (LOW mark) is displayed when the battery voltage falls below 4.4 V.
Operating temperature range 0 to 40ºC
Storage temperature range -10 to 50ºC
Outer dimensions 189.5 (W) x 47.5 (H) x 66 (D) mm
Weight Approx. 280 g (including batteries)
Accessories AAA alkaline batteries × 4, Carrying case


IP-292/296 Ignition pulse detector IP-3000A Ignition pulse detector IP-3100 Ignition pulse detector
HT-6100, Handheld, Digital, Tachometers, ONO SOKKI HT-6100, Handheld, Digital, Tachometers, ONO SOKKI HT-6100, Handheld, Digital, Tachometers, ONO SOKKI
OM-1200 Ignition pulse detector LA-0203C Tripod HT-0522/0521A Magnetic stand/Stand jig
HT-6100, Handheld, Digital, Tachometers, ONO SOKKI HT-6100, Handheld, Digital, Tachometers, ONO SOKKI HT-6100, Handheld, Digital, Tachometers, ONO SOKKI
PB-7090 AC adapter    
HT-6100, Handheld, Digital, Tachometers, ONO SOKKI