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Uni-T UT311A Vibration Meter
Uni-T UT311A Vibration Meter
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Uni‑T UT311A is a compact vibration meter for field diagnostics: it measures acceleration (PEAK), velocity (RMS) and displacement (P‑P) with instant readings on a rotatable and backlit 2.4” TFT display. For acceleration, it offers two modes: LO 10 Hz—1 kHz and HI 1—15 kHz. Flashlight, Data Hold and automatic shutdown. 1350 mAh rechargeable battery via USB‑C (about 12 h). Probes and USB‑C cable are included.
Description
Uni-T UT311A Vibration Meter Description
Uni-T UT311A Vibration Tester
The Uni-T UT311A Vibration Tester is a compact device for monitoring the condition of machines that measures acceleration, speed and movement of vibrations with instant readings displayed on a 2.4-inch TFT screen. The device operates in two frequency modes for acceleration (LO: 10 Hz—1 kHz and HI: 1 kHz—15 kHz), allowing you to customize the measurement based on the nature of the equipment's operation. Its compact design, self-rotating screen, integrated flashlight, and USB-C rechargeable battery make the UT311A ideal for field inspections and
routine diagnostics of industrial equipment.

Tailor-made measurements for various applications
The UT311A offers three key measurement methods: acceleration (PEAK), velocity (RMS) and displacement (P-P), allowing you to evaluate both dynamic vibrations and the overall operating conditions of the machine. Separate frequency modes for acceleration (LO and HI) allow a more precise analysis of both slow and fast vibrations, rather than using a single generalized range. The Data Hold function allows you to lock the result on the screen, making it easier to read in less convenient conditions
.

Ease of use and portability
The device has been designed for field use, which is why it has a clear TFT screen with automatic rotation and backlighting, improving the visibility of the results regardless of orientation. The integrated flashlight helps in low light, and the automatic shutdown after 5 minutes reduces energy consumption. The 1350 mAh battery offers up to about 12 hours of operation, and charging via USB-C takes about 3 hours. The weight of about 191 g includes the device with the short probe, i.e. in a ready-to-use configuration.

Even
- Uni-T UT311A Vibration Tester
- Long measuring probe
- Short measurement probe
- USB-C charging cable
- User manual
- Safety instructions
| Manufacturer: | Uni-T |
|---|---|
| Model | UT311A |
| Acceleration measure | 0.1—199.9 | m/s²
| Measure speed | 0.1—199.9 | mm/s
| Displacement size | 0.001—1,999 mm |
| LO | acceleration frequency range | 10 Hz—1 kHz/HI 1 kHz—15 kHz
| Frequency speed range | 10 Hz—1.5 kHz |
| Frequency range shift | 10 Hz—1 kHz |
| Resolution | 0.1 m/s²/0.1 mm/s/0.001 mm |
| Acceleration accuracy and velocity | ± (5% +2 digits) |
| Shift accuracy | ± (10% +2 digits | )
| 2.4" TFT LCD | display | , automatic rotation, backlight
| Data Hold | functions | , flashlight, battery indicator, automatic shutdown after 5 min
| Power supply | : Li-Ion battery, 1350 mAh, 3.7 | V
| USB-C | charging | , DC 5V
| Operating time | about 12 h |
| Operating conditions | 0°C—40°C, ≤ 80% RH | (without condensation)
| Dimensions | 180 × 28 × 64 mm (with short probe) |
| Weight | 191 g (with short probe) |
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