Engine Tachometer ET-100
The ATSENSE ET-100 Engine Tachometer is a versatile, high-function instrument designed for accurate measurement of engine revolutions in R&D and test applications. It supports a wide range of sensors—including ignition pickups, gear, proximity, and photoelectric sensors—offering digital, analog (F/V), pulse, and USB outputs. With ±100ppm accuracy, 0–99,999 rpm range, moving average functions, and robust filtering, it ensures stable readings even with missing gear teeth or unstable signals. Compact, durable, and easy to integrate, the ET-100 is an essential tool for precise rotation speed measurement.■ Resolution per revolution
Measurements can be taken whether using both a piece of reflection tape to mark each revolution, or if there are 60 gear teeth.
Setting the number of pulses will display r/min data automatically.
■ Measurement data
As well as a digital display, analog (FV output) and USB data are also output.
Because USB data is output every 0.1s on a digital display, there is no lag between the display data and data on the PC.
■ Pulse output
The signal which is input undergoes wave shaping before output.
And simultaneously, a pulse is output once every revolution, or a half-frequency signal is output.
■ Power supply
The unit is driven by 9 to 32V DC. And an AC adaptor is supplied as an accessory.
■ Accuracy
Display accuracy of ±100ppm±1digit. High accuracy analog output (FV output) of ±0.1%F.S
■ Wide variety of functions
The input selects the AC/DC coupling, and many functions, including a moving average and pulse response delay, are then available as standard for improving the measurement.
Measurements can be taken whether using both a piece of reflection tape to mark each revolution, or if there are 60 gear teeth.
Setting the number of pulses will display r/min data automatically.
■ Measurement data
As well as a digital display, analog (FV output) and USB data are also output.
Because USB data is output every 0.1s on a digital display, there is no lag between the display data and data on the PC.
■ Pulse output
The signal which is input undergoes wave shaping before output.
And simultaneously, a pulse is output once every revolution, or a half-frequency signal is output.
■ Power supply
The unit is driven by 9 to 32V DC. And an AC adaptor is supplied as an accessory.
■ Accuracy
Display accuracy of ±100ppm±1digit. High accuracy analog output (FV output) of ±0.1%F.S
■ Wide variety of functions
The input selects the AC/DC coupling, and many functions, including a moving average and pulse response delay, are then available as standard for improving the measurement.
- ±10V non-step trigger level adjustment
- Rising/Falling edge changeover
- AC/DC coupling changeover
- Voltage/Open collector pulse supported
- 0.2V/2V hysteresis changeover
- 10kHz low pass filter ON/OFF function
- Wave shaping of sensor signal to logic signal
- 0 to 10V analog output proportional to rotational speed
- Rotational speed output to PC by USB
- Pulse response delay function can eliminate unstable and unnecessary signals at engine start-up.
- The effect of missing teeth for a gear wheel being measured can be alleviated with the moving average function and the speed measured as normal. Most effectively used, for example, with the signal from the signal plate of a crankshaft.
| Display | |
| Display method | 7 SEG LED, character height 10mm, 5 digits, green |
| Display items | Rotational speed |
| Display range | 0 to 99999r/min, and “OVER” displayed if 100000 or more |
| Display refresh time | 0.1 to 1.0(s) |
| Zero display | Leading zero suppression |
| Accuracy | ±100ppm±1digit |
| Trigger display | SIG green blinking LED, continuously lit for high-speed pulse input |
| Input | |
| Number of inputs | 1 input (BNC connector and 3-pole connector are internally common) |
| Input signal format | Voltage pulse (voltage resistance ±30V) |
| Input coupling | DC/AC |
| Trigger level | ± 0.2V to ±10.0V |
| Hysteresis | 0.2V/2V |
| Pull-up | OFF/Pulled up to 12V by 10kΩ |
| Trigger direction | Rising/Falling |
| Frequency range | 0.1Hz to 9.8kHz (depending on the wave shaping pulse width) |
| Sensor power supply | 12V (100mA max) |
| Input resistance | Approx. 100kΩ |
| Number of pulses per revolution | 0.5 to 360.0p/rev |
| Pulse output | |
| Number of outputs | 2 outputs (BNC connector) |
| Output items | P OUT: wave shaping output P OUT2: half-frequency division output/1 pulse output per revolution |
| Signal level | 0-5V logic signal, 10mA max |
| Output logic | Normal or Reverse |
| Analog output | |
| Number of outputs | 1 output (BNC connector) |
| Output items | Rotational speed |
| Output range | 0 to +10V |
| Accuracy | ±0.1%F.S. |
| Refresh time | 1ms per each pulse signal input |
| Allowable load resistance | 10kΩ |
| Data output | |
| Connector | USB mini B |
| Refresh time | Synchronized with display refresh time |
| Output content | Rotational speed display value |
| * Please contact us for details about the software on the PC side. | |
| General specification | |
| Insulation | Power supply input/signal input/analog output and pulse output, USB |
| Power supply | 9V to 32V, 5W (max) |
| Connector | Rear panel φ 5.5×2.1 standard DC jack (center positive) |
| Protection functions | Reverse polarity connection protection |
| Power switch | Front panel slide switch |
| Product case | Aluminum case, anodizing treatment |
| External dimensions | W: 140 H: 40 D: 100 (excluding projecting parts) |
| Weight | Approx. 400g |
| Operating temperature range | 0 to 40ºC / 85%RH or less (with no condensation) |
| Accessories | Rubber feet (4), AC adaptor (1), DC plug cable (1) |
