WDDS-2/2B digital resistivity equipment is a new generation of DC 

resistivity instrument which is based on a series of advanced 

electrical equipment for resistivity sounding survey, and adopts 32-

bit microcontroller technology and 24-bit A / D technology 

development.

WDDS-2 is the basic resistivity meter only with function of 1D Res 

Sounding. WDDS-2B designed with a internal high power on the basis of 

WDDS-2, up to 200V.

Function:
1D Resistivity vertical electrical sounding

Application
Underground water inspection
Engineering geology inspecting as dam base exploration and flood
Metal source exploration
Non-metal source exploration
City geophysical exploration
Railway and bridge

Main features:
RS-232 serial interface enables the instrument to communicate with 

other computers.

Monitoring the dynamic variation of MN electrode potential through 

inspecting its ground resistance.

Receiver supports transient over-voltage protection for input voltage; 

transmitter supports over-voltage protection, over-current protection 

and AB open-circuit protection.

Automatically displaying the resistivity relative error between the 

current measuring result and the last measuring result.

Able to store measuring data for more than 150,000 times, including 

voltage, current, resistivity, relative error, SP, array constant, 

measuring point and so on.

Technical specifications:

Transmitter

Maximum supply voltage: 1000V 
Maximum supply current: 3.5A (over-current protection) 
Supply waveform: repeating ON+, ON- 

Receiver

Input impedance: ≥30M 
Input voltage range: -6V ～ +6V,±1%±1 
Delay time: 0.1～5s (can be setted by program) 
Automatic SP compensation range: -1 to +1V 
Ground resistance: 0.1 ～ 200KΩ±3% 
50Hz industrial frequency pressing:≥60dB 
Current measurement: 3.5A, ±1% ±1 LSB 

Other

LCD display: 4 line×20character 
Operating temperature: -10℃～50℃ 
Power: eight C size batteries (or same specs nickel-cadmium battery) 
Power consumption:≤70mA(working) ≤30mA(stand-by) 
Weight: 4.2Kg 
Dimensions (L×W×H): 270mm×246mm×175mm