Bộ Cảm Biến Nhiệt Hồng Ngoại Lh1778 S Lhi778

Lhi778 thermal release infrared sensor

Product description:
When the heat-emitting infrared sensor changes the heat radiation energy, it produces charge change.This effect is used to detect changes in infrared radiation.These heat-release sensors are used for human mobile detectors, passive infrared burglar alarms and automatic light switches.Based on the same principle, the thermoelectric sensor is applied to gas detection by infrared absorption method.
Product characteristics:
Low noise, high response
Excellent co-mode equilibrium-dual unit type
To-39, to-5 packages
Various filter windows for broadband or narrowband applications
Single channel or dual channel devices

Single component heat compensation
Typical applications:
Passive infrared anti-theft alarm: strong white light and electromagnetic radiation have excellent anti-jamming performance.
Human movement detection:
Ceiling mount human detection
Gas analysis
Non-contact infrared measurement
The lhi 778 heat-emitting infrared sensor series is a standard dual-element design that can be used in all changing motion regulation devices.The sensor contains a bi-element heat-emitting ceramic element connected to the fet.It has a high sensitivity and excellent co-implementation model, which can maintain low noise at fixed locations and in case of temperature change.
Product parameters:
Sensitive element area 2.0x1.0 mm2
Base sheet thickness 0.5 mm
Working wavelength 7-14m
Average pass rate 75%
Output signal 2.5v
Balance 20%
Working voltage 2.2-15v
Working current 8.5-24a
Working temperature-20°C-+70°C
Preservation temperature-35°C-+80°C
Note:
The sensor detects infrared radiation by using the characteristics of thermally released material polarization with temperature change. the two-sensitive element complementarity method is used to restrain the interference caused by temperature change and improve the stability of the sensor.
Use:
-the above-mentioned characteristic indicators are measured under source polar resistance r2,47k conditions and users can adjust the size of r2 to their own needs when using sensors.
-attention to the location and field of view of sensitive elements for optimal optical design.
-all voltage signals are measured using peak-to-peak calibration.The ea and eb in equilibrium b represent the peak of the voltage output signal of two sensitive elements respectively.
-when sensing, the bending or welding part of the tube foot should be removed from the base of the pipe foot above