For over 60 years, Schonstedt Instrument Company has been the world’s leading manufacturer of Underground Locators, with over 350,000 deployed worldwide, including over 500 donated through the Schonstedt Humanitarian Demining Initiative.
PRECISION INSTRUMENTS
for UXO Clearance
Our Instruments

GA-52Cx
Most Sensitive
- Industry standard for over 40 years
- 5 sensitivity settings
- The original Schonstedt locator

GA-72Cd
Most Rugged
- Digital readout and bar graph displays
- 2 audio signal modes
- 4 sensitivity settings

GA-72Cd-ML
Military Version
- Field-tested design and same rugged specs as GA-72Cd
- Desert sand color
- Rechargeable batteries
GA-52Cx Features
- Enhanced target definition
- Unsurpassed detection range
- Clear, sharp, detection signal pinpoints the target
- Ease of operation reduces search time
- Modular construction and high performance components
- Weather protected controls
- Rugged, lightweight case
- Patented HeliFlux® sensors
- No response to aluminum, brass, or copper
- One Year Warranty for UXO use
GA-52Cx Specifications
Input Power | Supplied by two alkaline 9V batteries |
Battery Life | 40 hours (intermittent usage) |
Output | Approximately 40 Hz idle tone in speaker. Tone frequency increases (or decreases) with gradient-field intensity. |
Weight | Approximately 2.5 lb (1.13 kg) |
Operating Temp | -13° to 140°F (-25° to 60°C) |
Overall Length | 42-5/16 in. (107.4 cm) |
Waterproof Length | 34-1/2 in. (87.6 cm) |
Nominal Sensor Spacing | 20 in. (50.8 cm) |
Construction | Rugged, modular all solid state in aluminum casing |
GA-72Cd Features
- Analog output for data logger entry
- Lightweight, easy-to-use-design reduces search time
- Modular construction and high performance components
- Patented HeliFlux® sensors
- No response to aluminum, brass, or copper
- One Year Warranty for UXO use
GA-72Cd Specifications
Audio Output | Switch at “A” Signal increases or decreases in volume with gradient-field intensity Switch at “B” Signal increases or decreases in frequency with gradient-field intensity. |
Video Output | Digital readout and expanding bar graphs indicate polarity (+ or-) and relative strength of the magnetic field. |
Input Power | Supplied by two Alkaline or Lithium 9V batteries |
Battery Life | 60 Hours (intermittent usage) |
Battery Check | 4-segment LCD BATT indicator |
Output | Approximately 40 Hz audio tone on speaker. Tone frequency increases or decreases with gradient-field intensity. |
Weight | Approximately 2.5 lb (1.14 kg) |
Operating Temp | -13° to 140°F (-25° to 60°C) |
Overall Length | 34.5 in. (87.6 cm) |
Waterproof Length | 21 in. (53.3 cm) |
Nominal Sensor Spacing | 14 in. (35.6 cm) |
Construction | Rugged, all solid state, polycarbonate & ABS casing |
GA-72Cd-ML Features
- Analog output for data logger entry
- Lightweight, easy-to-use-design reduces search time
- Modular construction and high performance components
- Patented HeliFlux® sensors
- No response to aluminum, brass, or copper
- One Year Warranty for UXO use
GA72Cd-ML Specifications
Audio Output | Switch at “A” Signal increases or decreases in volume with gradient-field intensity Switch at “B” Signal increases or decreases in frequency with gradient-field intensity. |
Video Output | Digital readout and expanding bar graphs indicate polarity (+ or-) and relative strength of the magnetic field. |
Input Power | Supplied by two Alkaline or Lithium 9V batteries |
Battery Life | 60 Hours (intermittent usage) |
Battery Check | 4-segment LCD BATT indicator |
Output | Approximately 40 Hz audio tone on speaker. Tone frequency increases or decreases with gradient-field intensity. |
Weight | Approximately 2.5 lb (1.14 kg) |
Operating Temp | -13° to 140°F (-25° to 60°C) |
Overall Length | 34.5 in. (87.6 cm) |
Waterproof Length | 21 in. (53.3 cm) |
Nominal Sensor Spacing | 14 in. (35.6 cm) |
Construction | Rugged, all solid state, polycarbonate & ABS casing |
Schonstedt Humanitarian Demining Initiative
Donate a Schonstedt, Save a life.
Now, those who wish to contribute demining tools directly to United Nations Mine Action partners in the world’s most devastated countries can do so. Businesses, individuals and nonprofit organizations such as church and school groups, trade associations and service clubs are invited to participate as follows:
- Purchase for donation any number of Schonstedt GA-72Cd magnetic locators at list price, and Schonstedt will match your donation unit for unit
- Schonstedt will ship the units directly to underserved countries according to UN priorities
- Donations are made in the name of the donor (group or individual)
- Donors will be recognized with ‘Thank You’ letters from
- Schonstedt Instrument Company
- The United Nations
- The U.S. Department of State
- The in-country recipient of the donation when possible
- Public relations assistance will be provided on request at no cost
And, most importantly, each donation represents an immediate and tangible contribution to humanitarian demining where it is most needed in the world… and where it would not otherwise be possible.
How to Give
Send a donation by mail, Donate online or call 800-999-8280.
Mail in donations to:
Woodstown Monthly Meeting
PO Box 13
Woodstown, NJ 08098
Please indicate in your contribution: “for Humanitarian Demining”. Donations may be tax deductible. Contributions of less than the current unit price ($1,041) can be sent to this address, where they will be aggregated.