Description This Laser Distance Measure employs laser technology to measure distance, area and volume accurately, quickly and conveniently. It has a wide measuring range 100m high accuracy up to ±1.5mm. In addition, this meter can use of Pythagorean indirect measure distances or lengths.
HAND HELD METAL DETECTOR MD-3003B1 Features: 1. High sensitivity. Detects a pin within 30mm�60mm. 2. Conveniently and simply to operate. Easily to adjust. 3. When battery voltage drop from 9V to 7V, the detecting distance remain unchanged. 4. Energy smart: it can work 40 hours continuously. 5. Except the light alarm, the audible alarm and the vibratory alarm can be chosen.
Product Description This is Active Infrared Detector.Install each pair at the opposite positions.Then there is a infrared area between these two detector parts. When someone passes the infrared region, the detector will send alarm signal to the security alarm host (which not included here).