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Safe Deposit & ATM Protection - Technical Aspects

Advanced safe detector

SesMoTM Technical Aspects for Sales and Seminars

Electrical and RF noise
Av-Gad Systems Safe Deposit & ATM Sensor called SesMo. The SesMo includes three integrated sensors: Heat, Light & Seismic. Most used for bank security systems, ATM, cash and automatic beverage machines protection.

New for year 2010 the SesMo PRO introduced, with higher security, self testing and unique three detectors in one unit!

The SesMo contains electrical interference protection and RFI problems are well filtered. The SesMo had been tested at a 1-meter distance with full spectrum RF noise from 50 to 1800 MHz.

Airborne effect
The signal analysis is independent from the airborne sound. The SesMo installation is permitted inside or outside the protected area. If it’s metal container for example installing the SesMo at the outside walls it’s permitted, consider rain, snow or other that may effect the SesMo.

The standard SesMo ABS housing is for indoor Safe Deposit Sensor applications only. For approved installation we offer the metal case SesMo – Details below.

The inertia sensor sensitivity and the response time can be programmed in order to prevent false alarms. The SesMo filters and signal processor test the signal to certain parameters before alarm signal.

When the protected Safe Deposit Sensor or container is solid and steady even in the highest sensitivity, the sensor does not cause false alarms, as the internal filters and signal processor are limited to a certain range.

Frequency range is from 72 Hz to 18.50 KHz, with certain internal filters that narrows the frequency response to certain groups.
Special filtering circuitry makes the unit is immune to environmental noises like low flight jets, very big automobiles (trucks, buses, etc) exhausts and other airborne effects.
In airports for example, use medium sensitivity and two pulses count when using the SesMo Safe Deposit Sensor.

Testing the SesMo
As few customers asked for combined testing too, we regret to inform that we are still trying to arrange the tester at a reasonable price; this is not simple. Many customers appreciated the current situation that saves them the $ 200 test tool cost.

In details
Light detection is tested by simple handy flashlight (reflector type) with 6V, 10W bulb. Direct the light to the SesMo location when you stand at 0.5 meter far.

Heat detection is set to detect at 80 degrees Celsius in a 1x1 meter metal cabinet. To test the SesMo for heat you need to remove the ABS housing first (may melt by heat), then use a simple 1000W heat fan (for dress settings), turn it on at 0.5 meter from the SesMo, at 20 degrees Celsius the SesMo detects the heat within 30 seconds or less.

Breaking detection: For Safe Deposit Sensor materials a 0.2 KG hammer does the testing job perfectly. When testing in softer surfaces (wood walls), use a plastic head hammer. Consider that a burglar uses 5 to 30 kg hammer while breaking in.

Most projects managers accept such test. It’s recommended to perform the test at 20-30 centimeters from the SesMo; after three (hammer) knocks, the SesMo is supposed to trigger an alarm.

The coverage area depends on the surface material, as there are many material types we can’t provide a full list.

Our most updated surface list and coverage for the Safe Deposit Sensor:
Safe deposit with 30 mm metal walls – 17 meters/square
Safe deposit with 50 mm metal walls – 12 meters/square
ATM machines with 5 mm metal surface - 14 meters/square
Concrete walls with 50 mm walls - 20 meters/square

This information is not accurate, as the Safe Deposit Sensor surface material, structure and design affect the SesMo & SesMo PRO coverage dramatically.
Few new versions are coming soon! Contact us for the latest news

Common Q and A
Please contact us for the full article.

Av-Gad Technical Dep't

Refer to the SesMo page for more


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