Section 1: Core Product Overview 产品概述

 

The UNI-T UT81B+ is a high-precision handheld oscilloscope multimeter designed for field engineers, repair technicians and electronic enthusiasts. Compact lightweight body with built-in large-capacity rechargeable battery, combines the portability of handheld multimeters and the powerful analysis capability of bench oscilloscopes. Equipped with 3.5-inch high-definition TFT color screen, True RMS measurement, dual-channel input and built-in signal source, it is your essential tool for daily circuit testing, fault diagnosis and R&D debugging.

 

Key Advantages

 

3 Functions in One: Digital Multimeter + Dual Channel Oscilloscope + Signal Generator

 100MHz analog bandwidth, 500MSa/s real-time single-channel sampling rate

 24000 counts high-resolution four-and-a-half digit multimeter

 True RMS AC measurement for accurate unstable waveform reading

✅ Built-in 5200mAh rechargeable battery, long working time

✅ Type-C charging & PC data connection for waveform storage and analysis

✅ Overload input protection, CAT III safety rating for industrial scenarios

 

Section 2: Multimeter Function Specifications（严格对照包装盒UT81B+参数）

 

Basic DMM Parameters

 

- Display Counts: 24000 (4.5 Digit High Resolution)

- True RMS Measurement: Supported

- DC Voltage Range: 0 ~ 1000V

- AC Voltage Range: 0 ~ 750V

- AC/DC Current Range: 0 ~ 10.000A

- Resistance Measurement: 0 ~ 100.00MΩ

- Capacitance Measurement: 0 ~ 2000.0mF

- Extra Functions: Diode Test, Continuity Buzzer Test

 

Section 3: Oscilloscope Function Specifications（UT81B+原厂参数）

 

- Analog Bandwidth: 100MHz

- Channel Quantity: 2 Channels (CH1 / CH2)

- Vertical Resolution: 8 bit

- Real-time Sampling Rate (Single Channel): 500 MSa/s

- Waveform Refresh Rate: 10,000 wfms/s

- Probe Attenuation: 1X / 10X / 100X / 1000X / 10000X

- Max Input Voltage: 400V (DC + AC Peak)

- Horizontal Sample Range: 0.25 Sa/s ~ 250 MSa/s

- Record Length: 8K / 4K Selectable

- Vertical Sensitivity: 10 mV/div ~ 10 V/div

- Rise Time: ≤ 3.5 ns

- Measurement Items: Period, Frequency, Amplitude, Peak-Peak, Max/Min/Average Value

- Trigger Source: CH1 / CH2

- Trigger Coupling: DC / AC

- Trigger Mode: Auto / Normal / Single

 

Section 4: Built-in Signal Generator Specifications

 

- Output Waveforms: Sine Wave, Square Wave, Triangle Wave, Pulse Wave, Arbitrary Wave

- Frequency Range: 0.1Hz ~ 30MHz (Sine Wave)

- Real-time Sampling Rate: 125MSa/s

- Waveform Length: 8K

- Vertical Resolution: 14 bit

- Output Impedance: 50 Ω

 

Section 5: Hardware & Display Details

 

- Screen: 3.5 Inch TFT Color Display

- Battery: Built-in 5200mAh 18650 Rechargeable Lithium Battery

- Endurance: Continuous working for 3~8 hours

- Interface: Type-C Port (Charging + PC Upper Computer Connection)

- Safety Grade: CAT III 1000V Input Safety Rating

- Input Protection: Full Range Overload Protection

- IP Rating: Not Rated (No Dustproof & Waterproof Grade)

- Body Size: 1989638mm

- Net Weight: About 690g

 

Section 6: Wide Application Scenarios

 

1. Electronics Repair: PCB circuit debugging, household appliance maintenance

2. Automotive Maintenance: Car ECU signal detection, sensor fault troubleshooting

3. Power Industry: Power equipment inspection, wiring circuit testing

4. Industrial Manufacturing: Equipment automation signal monitoring

5. Laboratory & Teaching: College electronic experiment, R&D prototype testing

 

Section 7: Standard Package List（原厂标配清单）

 

1 × UT81B+ Main Unit

1 × Power Adapter

1 × Type-C USB Cable

2 × Passive Oscilloscope Probes

1 × Alligator Clip Cable (Special for UT81B+)

1 × Multimeter Test Leads

1 × User Manual

1 × Warranty Card & Certificate

 

Section 8: Purchase Notes & Warranty

 

- Brand: UNI-T (Original Authentic Unit-T Product)

- MPN: UT81B+

- Country of Origin: China

- Warranty: Official factory warranty support

- Please confirm the model is UT81B+ before purchase; bandwidth and sampling rate differ from UT81A+/UT81C+/UT81D+