In the electromagnetic spectrum, the infrared portion is divided into three regions: near infrared region, mid infrared region and far infrared region.The wavelengths of these regions and their applications are shown below. 1. Range - maybe up to ten meters. (This technology is used in alarm systems, door openers etc.) Some spotlights have a PIR (passive infrared sensor). The main areas are sensing and remote controls. few centimeters to several feets, it depends upon the type of IR transmitter and the manufacturer. operating temperature range from -25 C to 85C. 20-60 degree and range of approx. Near infrared region — 700 nm to 1400 nm — IR sensors, fiber optic 2. IR LEDs have light emitting angle of approx. working voltage of 3 .3 V to 5 V. working current of 1.5 mA. Specification of IR Sensor Module: It has a receiving range of 2 ~ 30 cm. IR LED Transmitter IR LEDemits light, in the range of Infrared frequency. IR light is invisible to us as its wavelength (700nm – 1mm) is much higher than the visible light range. They detect your body heat and turn on as you approach. It's range is only a few centimeters. Infrared technology addresses a wide variety of wireless applications. Some transmitters have … As some of the other posters have commented, range depends on power. Mid infrared region — 1… The IR sensor module consists mainly of the IR Transmitter and Receiver, Opamp, Variable Resistor (Trimmer pot), output LED in brief.