UNI-T UT273+ Clamp Earth Resistance Tester | Long Jaw Ground Tester

Brand: Uni-T

SKU: 130909

The UNI-T UT273+ is a professional Clamp Earth Resistance Tester featuring a unique long jaw designed for flat steel conductors.

Long Jaw Design (55×32mm): Ideal for testing flat steel grounding straps.
Dual Measurement: Tests Earth Resistance (0.01Ω-600Ω) and Leakage Current (0-20A).
Data Logging: Stores up to 500 data sets with USB PC connectivity.
Display: Clear EBTN screen for visibility in all lighting conditions.
Safe Operation: Non-contact measurement without disconnecting ground wires.

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Description

Overview

The UNI-T UT273+ is a clamp earth resistance tester that measures ground resistance without the need for auxiliary spikes or disconnecting the earth system. With a 55 × 32mm jaw, it measures earth resistance from 0.01Ω to 600Ω and AC leakage current up to 20A, and adds a 4-digit EBTN dual display, resistance alarm, auto ranging and 500-dataset storage for professional grounding surveys.

Key Features

Clamp-on earth resistance measurement (0.01Ω ~ 600Ω)
AC leakage current measurement up to 20A
55 × 32mm jaw with 4-digit EBTN dual display
Resistance alarm, auto ranging and 500-dataset storage
No auxiliary spikes required, CAT IV rated

Applications

Earth/ground resistance surveys
Lightning protection and loop resistance testing
Leakage current checks on grounding systems
Electrical safety and preventive maintenance

What’s in the Box

UT273+ clamp earth resistance tester
AA batteries
Carrying case and English manual

Why buy from MME in UAE

MOHAMMAD MAHDI Electronics Trading LLC (MME) is a trusted supplier of Uni-T test and measurement equipment in the UAE. We offer genuine products, competitive pricing, fast local delivery across Dubai, Abu Dhabi and the wider UAE, and knowledgeable after-sales support. Download the datasheet

Specifications

UNI-T UT273+ Technical Specifications
Earth Resistance (Ω)
0.010Ω – 0.199Ω	±(1% + 0.02Ω)
0.20Ω – 1.99Ω	±(1% + 0.05Ω)
2.0Ω – 49.9Ω	±(1% + 0.5Ω)
50.0Ω – 99.5Ω	±(1.5% + 1Ω)
100Ω – 199Ω	±(2% + 2Ω)
200Ω – 395Ω	±(5% + 5Ω)
400Ω – 590Ω	±(10% + 10Ω)
590Ω – 600Ω	±(20% + 20Ω)
Current Measurement (AC)
1.00mA – 9.99mA	±(2.5% + 1mA)
10.0mA – 99.9mA	±(2.5% + 5mA)
100mA – 999mA	±(2.5% + 10mA)
1.00A – 9.99A	±(2.5% + 0.2A)
10.0A – 20.0A	±(2.5% + 0.5A)
Features
Jaw Size	55mm × 32mm (Long Jaw)
Screen Type	4-digit EBTN screen
Data Storage	500 sets
Data Transmission	Yes (via USB cable)
Sample Rate	1 time/s
Timer Function	Yes
Protection & Alarm	Overload Protection, Anti-interference, Alarm Function
Safety Rating	CAT III 300V, CAT IV 150V
General Characteristics
Product Dimension	285mm × 85mm × 58mm
Net Weight	1180g (batteries included)
Standard Accessories	User manual, AA batteries (4pcs), Calibration loop, USB cable, Tool box
Standard Quantity Per Carton	1 pcs/carton

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