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Reliable tools for efficient surveys

With more than forty years of field experience, we know the importance of reliable, compatible, easy-to-use tools for specific survey needs. Zonge geophysical data acquisition equipment includes all the tools you need for efficient data collection.

MX-30 Transmitter Input Multiplexor Switch
for Cabled Electrode Arrays

An essential component for rapidly acquiring resistivity data using cabled electrode arrays, the MX-30 is a computer-controlled switching interface between a transmitter, a multi-channel receiver (such as the Zonge GDP) and an array of electrodes.  Weight: 16 kg (35 lb).

  • Use an MX-30 multiplexor with a GDP receiver and ZT-30 transmitter to gather Electrical Resistivity Tomography data.
  • Connect transmitter leads to any pair of electrodes, up to 30 electrodes.
  • Select any number of electrode pairs for input to the receiver.
  • Up to 16 output channels, or purchase fewer channels to reduce initial cost and upgrade later in the field.
  • Cascade multiple MX-30s together to address multiple electrode arrays.
  • Control configuration via RS-232C serial communications.
  • Control software available for laptop.



LB2500  Load Bank

Resistor load bank, including fuses, 2.5 KVA. Weight: 13.2 kg (29 lb).


Potential electrode buffer amplifier (unity gain) for multiple, in-line electric field measurements.  Used when line capacitance influences the frequency response, as in areas of high contact resistance and/or long dipole lengths.  Weight, each with batteries: 0.5 kg (1 lb).

ISO/1  Isolation Amplifier

Anc10_IsoAmp_8629This isolation amplifier serves as a transmitter-current monitor when making referenced CR measurements.  Self-contained power supply with battery. Includes one input signal cable, one output signal cable, battery charger, and five 3AG 1/2A fuses for each unit.  Weight with batteries: 4 kg (9 lb).


 ZCM-10 Current Monitor

The ZCM-10 current monitor replaces the ISO/1. It serves as as a transmitter current monitor. Self-contained power supply with battery.


Nine-electrode (8 dipole) switch box for currents up to 36 amperes. Used for dipole-dipole IP surveys.  Weight: 6.8 kg (15 lb).

TEMCal Box

A “calibrate load” used to generate standard decay curves for TEM and NanoTEM systems as a check for system operation. Weight: 0.5kg (l lb).

MULT/SY-32 Connection Box

Connection box for synchronizing one XMT-32 transmitter to GDP receivers and SC-8 signal conditioning boxes (up to 4 total).  Weight: 1.2 kg (2.5 lb).

Battery Packs

External 12-volt battery pack for the MX-30 electrode multiplexer and 12/24-volt battery pack for the NT-20 and ZT-20 TEM transmitters.
MX-Bat Weight: 4.5 kg (10 lb). NTEM-Bat Weight: 8.5 kg (18.5 lb).Anc6_ChargerZoom_8182

Battery Charger

Universal input, 12-volt battery charger. Input power specifications: 85-264 VAC, 45-440 Hz or 104-350 VDC. Dual circuits permit charging two 12v batteries simultaneously.  UC-2 12v Battery Charger Weight: 4.8kg (10.5 lb).

Wire Reels

Powered or manual (hand cranked) wire reels for transport, layout and retrieval of wire for geophysical surveys:
Anc1_power reel_7126Manual reels may be ordered empty or with 610 meters (2,000 feet) of 14-gauge MTW grade transmitter wire.  Seven reels of wire are adequate for a standard 7-electrode, 300 meter dipole-dipole IP survey.

Power Reels

Power reels may be ordered empty or with 1,067 meters (3,500 feet) of 14-gauge MTW grade transmitter wire.  Four reels of wire are adequate for a standard 7-electrode, 300 meter dipole-dipole IP survey.


Electrode switch box can be used to connect and switch nine electrodes (eight dipoles)