The DAS-SDD-1Z utilizes a processor coupled with an LDR & proprietary software with self calibrating software algorithm to analyze subtle luminous intensity variations. The auto calibration routine determines battery drain associated with the SDD circuit and illumination source, and then optimizes the SDD performance to achieve up to 8 hours of continuous operation. Luminous intensity changes are then converted into sound that your ears can discern.


Model: DAS-SDD-1Z Single Zone Shadow Detector

Power: (1) 9Vdc Alkaline Battery (Included)
Battery Life: 8-10 hours typical
Sensor: Hermetically Sealed Precision LDR
Response time: 250mS
Light Wavelength Range (Tested): 400 - 660 nanometers (nm)
Calibration: Auto-Calibration (5-sec Intervals)
Sensitivity: 5 levels (Selectable)
Processor: 12-bit
Alarm: 4 -Ascending Tones with Green LED (Light Increase), 4 - Descending Tones with Red LED (Light Decrease)
Mounting: Tripod (Not Included)

Battery Block Illuminators
Power: 9Vdc Alkaline Battery (Included)
Battery Life: 8-10 hours typical
LED: (1) 10mm 20 deg. RED LED for up to 75' Distance (Included)
LED: (1)  5mm Diffused Green LED for up to 45' Distance  (Included)
Mounting: Tripod (Included)

The SDD utilizes a computer processor coupled with an LDR & proprietary software with a self calibrating software algorithm to analyze subtle luminous intensity variations. The auto calibration determines battery drain associated with the SDD circuit and illumination source, and then optimizes the SDD performance to achieve up to 8 hours of continuous operation. Luminous intensity changes are then converted into sound that your ears can discern.
You can use the SDD with:
* RED, GREEN or WHITE LEDs and even a Flashlight
* A RED or GREEN Laser Grid
* A RED or GREEN Laser Pointer

* You can use the subtle light from a RED exit sign, street light coming through a window any other "stable" indirect incandescent light.
A Red, Green or White LED and Laser Illumination source can be used up to 70' away. When something interrupts the calibrated field of view (less light) quickly, a descending series of tones will sound. If an objects dwells within the beam or is self illuminating (increased light level) ascending tones will be heard.

Objects that reflect light, or that are self illuminating can also be detected. The DAS-SDD has 5 sensitivity settings. So that the device can be configured for a variety of investigative styles and circumstances. You can even use the illumination from a candle, exit sign or full moon shining through a window. Application technique really depends on the creativity of the person using the device.