Project Description

Hare Series - Contact Resistance Tester


HARE Series is a micro-ohmmeter manufactured by using advanced engineering technologies which can apply up to 100A/ 200A/ 300A test current. With its easy-to-use software, HARE Series can easily measure contact resistance of circuit breaker, shunt and disconnector by applying adjustable test current up to 100A/ 200A/ 300A depending on the model. HARE Series can measure from 0.1 μ Ω to 5 Ω and is capable of measuring static resistance of the circuit breaker’s contact points. HARE Series can also measure idle circuit breakers. The 4.3-inch colour touch screen displays all measurement results on a single screen. With a user-friendly interface, the HARE Series guides operators to perform tests quickly. HARE Series’ flash memory feature allows storing around 1000 records. Users can copy test records by using a USB drive. HARE Series is a very compact, rugged device with IP67 protection class (case closed) which weighs only 3 kg.


  • Portable Contact Resistance Tester
  • 0.4A to 100A Adjustable test current (HARE-100)
  • 0.4A to 200A Adjustable test current (HARE-200)
  • 0.4A to 300A Adjustable test current (HARE-300)
  • Up to 5 Ω resistance measurement
  • 0.1 μΩ resolution
  • Automatic discharge
  • High EM interferences protection
  • Battery-powered
  • Ultra-fast measurement
  • Light-weight
  • 4.3” Resistive touch colour display (visible under sunlight)
  • User-friendly operation menu
  • Internal memory
  • USB Flash DriveIP67 Protection case

Technical Specifications

Measurement Parameter Contact Resistance
Measurement Modes Static Resistance Measurement
Adjustable Test Current 0.4A to 100A (HARE-100)

0.4A to 200A (HARE-200)

0.4A to 300A (HARE-300)

Measurement Range 0.1 µΩ to 5 Ω 
Accuracy & Resolution Nominal


Full Range


Resolution Recommended Test Current Typical Accuracy
1 mΩ 999.9 μΩ 0.1 μΩ 50 – 300 A ±0.1% rdg ± 0.1% Fs
10 mΩ 9.999 mΩ 1 μΩ 10 – 300 A ±0.1% rdg ± 0.1% Fs
100 mΩ 99.99 mΩ 10 μΩ 5 – 30 A ±0.1% rdg ± 0.1% Fs
1 Ω 999.9 mΩ 0.1 mΩ 1 – 3 A ±0.1% rdg ± 0.1% Fs
5 Ω 4999 mΩ 1 Ω 0.4A ±1% rdg ± 1% Fs
Power Supply to charge the battery 100-240 V 47/63 Hz
Memory Up to 1000 records
Test Plan Up to 6 plans
PC Software DMP Software (Reporting only)
Display 4.3-inch TFT touch display
Dimensions 12.5” x 10.1” x 6.0” (318 mm x 257 mm x 152 mm )
Weight 3 kg
Working Temperature -10 °C to + 60 °C
Storage Temperature -30 °C to + 70 °C
Humidity 95% RH non condensing
Protection Class IP67 (case closed)
Set of Package HARE device, Rechargeable Battery, Power Cord, 1.5m Measurement Cable Set, USB