EM-IP Tx Controller

Instrumentation GDD have recently launched the production of its EM-IP Tx Controller, a compact, robust and easy to use instrument designed for obtaining optimized results of EM and IP surveys.

Buy or rent this Instrument

This instrument enables GPS synchronization of your GDD receivers with any of your transmitters for both electromagnetic (EM) and resistivity/induced polarization (IP) surveys. It measures and records the GPS timestamp current.

  • √ Accurate apparent resistivity calculation
  • √ Advanced signal processing for EM surveys (excellent conductors (ON-TIME))
  • √ Infinite electrode and remote station current monitoring
  • √ And more...


  • Useful for EM and IP surveys
  • Records GPS timestamp current full waveform
  • Easy to operate and inexpensive
  • Shock resistant, portable and environmentally sealed
  • Transfers data to PC with USB Memory stick
  • USB Firmware upgradable
  • Offset cancellation
  • Accessories: socket plugs (rated 50A), external GPS antenna, memory stick, Master-Slave IP cable and/or NordicEM24 synchronization cable.
  • Applications : mining exploration, groundwater exploration, geotechnical investigations and other related fields


Weight EM-IP Tx Controller only

3.7 kg

Total weight
(including accessories and shipping box)

13.8 kg

Total EM-IP Tx Controller only

28 x 25 x 12 cm

Total dimension
(including accessories and shipping box)

53 x 38 x 21 cm

Operating temperature

-40° C a +60° C
(-40° F a +140° F)

Type of surveys

EM and Resistivity/IP

Power supply

Two rechargeable Li-ion batteries


Environmentally sealed heavy-duty Pelican case

Compatibility with EM transmitters Geonics, Zonge, Phoenix, Crone (could be adapted to others)

Compatibility with IP transmitters

GDD (could be adapted to others)

Base Frequency Range (Time-Domain)

Repetition Rate: 0.03125 Hz to 30 Hz
Time Base: 8.333 msec to 8 sec

Signal waveform

Time-Domain (ON+, OFF, ON-, OFF)

Sampling Rate

1000Hz (one reading each 1 msec)

Input Current

+ 40A

Intrinsic noise


Voltage control signal

5V et 12V



Duty cycle

50 %

ADC Resolution

24bits (5 µA)

GPS Timestamp Resolution

0,1 µsec

Buy or rent this Instrument

Contact Us

Phone: +1(418) 478-5469

Monday thru Friday. 9 AM to 5 PM. (Eastern Time (EST)/New York)


Instrumentation GDD
1963 rue Frank-Carrel
Suite 203
Quebec (Qc) CANADA
G1N 2E6

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