Multifunctional Portable Digital Tachometer with Wide Measuring
Range And High Resolution
Brief Introduction:
Used to measure rotative velocity, surface speed, frequency of
motor. Applicable to the product departments of motor, fan,
chemical fiber, washing-machine, automobile, airplane, steamer etc.
A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is
an instrument measuring the rotation speed of a shaft or disk, as
in a motor or other machine. The device usually displays the
revolutions per minute (RPM) on a calibrated analogue dial, but
digital displays are increasingly common.
Features:
* Multifunctional, one instrument combines PHOTO TACH.(RPM) &
CONTACT TACH. (RPM , m / min, ft / min ). It can also be applied to
the measurement of Frequency, Cycle, Pulse Times, Pulse Distance,
User-defined Pulse Distance, etc.
* Digital display with no guessing errors.
* Wide measuring range and high resolution.
* The last value / max. value / min. value will be automatically
stored in memory.
* The use of durable, long-lasting components, including a strong,
light weight ABS-plastic housing assures elegant shape and ease of
use.
* Use USB data output to connect with PC.
* Provide Bluetooth data output choice.
Model & Applications:
| Model | Photo | Contact | Surface Speed | Frequency | Cycle | Pulse Times | Pulse Distance |
| DT-2859 | √ | √ | √ | √ | √ | √ | √ |
| DT-2236 | √ | √ | √ | — | — | — | — |
| DT-2858 | √ | √ | √ | — | — | — | — |
| DT-2857 | √ | — | — | — | — | — | — |
| DT-2856 | √ | √ | — | — | — | — | — |
Specifications:
| Measuring Range | Laser | 2.5~99,999 r/min |
| Contact | 0.5~19,999 r/min |
Surface Speed | 0.05~1999.9 m/min 0.2~6560 ft/min |
| Frequency | 0.04~1666.65 Hz |
| Resolution | Rotative Velocity | 0.1 r/min (0.5~999.9 r/min) |
| 1 r/min (Over 100 m/min) |
Surface Speed | 0.01 m/min (0.05~99.9 m/min) 1 m/min (Over 1000 r/min) |
0.1 ft/min (0.1~999.9 ft/min) 1 ft/min (Over 1000 ft/min) |
| Accuracy | (0.05%n+1d) |
| Sampling Time | 1.0s(Over 60 r/min) |
| Test Range Select | Automation |
| Memory | Max Value /Min Value /Last Value |
| Time Base | Quartz Crystal |
| Laser Tach | 50~250 mm/2~10 inch(Typical) |
| Detecting Distance | Max 600 mm/24 inch |
| Power Consumption | 80 mA (Testing) |
| Operating Temperature | 0~50℃(32~122F) |
| Power Supply | 4x1.5V AAA Size (UM-4) Battery |
| Dimensions | Main Unit | 140x72x34 mm(5.5x2.8x1.3 inch) |
| Sensor | 45x195 mm(1.8x7.7 inch) |
| Weight | 245g/0.540 lb(Not Including Batteries) |
