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Non-contact digital engine tachometer
Discontinued Products
SE-2500

The SE-2500A is a battery-powered, non-contact, handheld engine tachometer designed specifically for gasoline engines, integrating the detection, measurement, and display units. Simply bring the top of the unit (detection unit) close to the ignition coil to measure the engine speed in units of 1 r/min or 0.01 r/s. The unit has a memory function that allows you to store up to 20 data points, making it convenient for later review.
It comes standard with both analog output (switchable with monitor output) and pulse output. The analog output can be used for recording with data recorders, etc. (the monitor output can be used for checking sensor waveforms or as an input signal for FFT analyzers), and the pulse output can be used as a signal for tracking analysis with FFT analyzers.
* The SE-2500A does not include the IP-2800 external sensor.
*We sincerely apologize, but please bring your own batteries.

Features

  • Because it is a non-contact type, measurements can be taken easily and safely.

  • You can obtain precise rotational speeds in units of 1 r/min or 0.01 r/s.

  • The backlight function allows you to check the displayed value even in dark places.

  • The memory function allows you to save up to 20 data files.

  • Standard equipment includes analog output and pulse output.
    Analog output: 0 to 1 V/0 to FS (FS is arbitrarily configurable), 10-bit D/A conversion
    Pulse output: Hi +4.5V or higher, Lo +0.5V or lower

  • With the optional detector (VP-201/VP-1210), the engine speed of a 4-cylinder diesel engine can be measured.*

*Measurement may not be possible depending on the engine.

Case Studies

  • Case Study No. 1
  • Case Study No. 2

Specification

Adaptive engine Gasoline engine
Arithmetic method Periodic calculation method
Measurement time Within 1 second + one cycle time of the input signal
Unit of measurement r/min、r/s
Measurement range
2-stroke 4 cycles/th> Rotation and Speed
- 1 cylinder 120–20,000 r/min
1 cylinder 2-cylinder 120–20,000 r/min
- 3-cylinder 120–20,000 r/min
2-cylinder 4-cylinder 120–20,000 r/min
- 5-cylinder 120–20,000 r/min
3-cylinder 6-cylinder 120–15,000 r/min
4-cylinder 8 cylinders 120–12,000 r/min
- 10 cylinders 120–10,000 r/min
- 12 cylinders 120–8,000 r/min
*For r/s, the range is obtained by dividing the above r/min value by 60.
Measurement accuracy Displayed value * × (±0.02%) ± 1 count (*Displayed value is the count value excluding the decimal point)
Detection method Electromagnetic induction method
Detection distance 10–200 mm
Target of detection Ignition coil
Selection of cylinder count and cycle count Built-in signal selector
Display section 5-digit LCD display, 7-segment display, with backlight (character height: 10.2 mm)
Overrange function An overrange (ERROR) mark is displayed when the measured value exceeds the display range.
Rotation limit warning function When the rotation speed exceeds a preset upper limit, an upper limit warning (↑ mark) is displayed.
Analog output Output relative to the displayed rotation speed value
Output voltage: 0 to 1 V / 0 to full scale (full scale is arbitrarily set)
Conversion method: 10-bit D/A conversion method
Linearity: ±1%/full scale
Output update time: within 50 ms + 1 cycle time
Temperature stability: ±0.05%/full scale/°C (span & zero)
Setting error: ±0.5%/full scale
Load resistance: 100 kΩ or more
Monitor output Analog output for monitoring after waveform shaping of the sensor signal.
(Use by switching between the above rotation speed analog output)
Load resistance: 100 kΩ or more
Pulse output Output one pulse for each signal detected.
Output voltage: Hi +4.5 V or higher, Lo +0.5 V or lower
Output logic: Positive logic
Load resistance: 100 kΩ or more
Operating temperature range 0 to +40°C
Storage temperature range -10 to +50°C
Power supply 4 x AAA batteries (1.5V) or dedicated AC adapter PB-7090 (optional)
battery life 32 hours or more (with backlight off), 8 hours (with backlight on)
Battery warning display A warning mark (LOW mark) will be displayed when the battery voltage drops below approximately 4.4 V.
Outline drawings 198.5 (L) ×47.5 (H) ×66 (W) mm

Outline drawings
Weight Approximately 300 g (including batteries)
Accessories Carrying case, instruction manual x 1
price  
Option

*Please provide your own batteries.

Option

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Outline Drawings

Instruction Manual

最終更新日:2025/09/03