HW-SR602
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1. Fully Automated Sensing:
The sensor is designed for seamless automation, generating a high-level output upon detecting a person within its sensing range.
When the individual exits the sensing area, the sensor automatically delays the transition from high to low level output.
2. Photosensitive Control Feature:
With photosensitive control capability, the sensor adjusts its sensitivity based on ambient light conditions.
It operates with reduced sensitivity during daylight or strong light conditions and heightened responsiveness during nighttime. (Note: Photosensitive control is inactive by default)
3. Triggering Mechanisms:
The sensor provides two triggering methods, with repeatable triggering as the default setting. a. Non-Repeatable Triggering Approach:
Following a high-level output, the sensor switches from high to low level output once the delay period expires. b. Repeatable Triggering Approach:
Upon detecting a high-level output, the sensor maintains this output if human activity is detected within the sensing range during the delay period.
The high-level output persists until the person leaves the sensing range, triggering the transition to low level output.
The sensor module automatically extends the delay period after each human activity detection, with the starting point being the time of the last activity detected.
Product model: HW-SR602
Working voltage: 3.3-15V (customizable)
Static power consumption:<30 uA;
Level output: induction 3V, no induction 0V,(customizable)
Delay time: 2.5S (resistance adjustable)
Blocking time: 0 (customizable)
Trigger method: Passive and repeatable trigger
Sensing distance: 0-3.5m (customizable)
Induction angle: 100 ° (customizable)
Working temperature: -20-75 ℃
Boundary dimension: diameter 13.5mm (customizable)
Mounting Height and Location:
The pyroelectric infrared sensor should be positioned at a height ranging from 2.0 to 2.2 meters above the ground level.
It is advised to avoid placing the sensor near areas susceptible to temperature fluctuations, such as air conditioning units, refrigerators, and stoves.
Clear Detection Range:
Ensure that there are no obstructions like screens, furniture, large plants, or other objects within the sensor's detection range.
Window Placement and Airflow Considerations:
Avoid directly facing the pyroelectric infrared sensor towards windows to prevent false alarms caused by external hot air flow and movement.
If feasible, consider closing the curtains to minimize interference.
Refrain from installing the sensor in locations with significant airflow activity.
Sensitivity to Human Movement:
The sensitivity of pyroelectric infrared sensors towards human body detection is influenced by the direction of movement.
These sensors are least sensitive to radial movements and most sensitive to lateral movements (perpendicular to the radius).
Importance of Installation Location:
Selecting an appropriate installation location is crucial in preventing false alarms and optimizing detection sensitivity of the infrared probes.