The combination of narrower beam angle and adjustable triggering range makes this device an ideal candidate for applications that need to minimize false alarm.
Note,
This device uses SD Card (storage capacity up to 32GB) as its storage. The audio to be playback needs to be pre-recorded and stored in the SD Card. If you need to be able to record new audio on the spot and the audio is less than 40 seconds, please refer to the link below.
https://wei48221.blogspot.com/2019/06/internet-connected-ultrasonic-alarm.html.
Adjustable Trigger Range
The device has a maximum detection range of 300cm (~118inch) and this range is adjustable by turning the dial as indicated below.
100% - The device will be triggered when it detects an object within 300cm (~118inch).
50% - The device will be triggered when it detects an object within 150cm (~60inch).
10% - The device will be triggered when it detects an object within 30cm (~11.8inch).
0% - The device won't be triggered.
Note that the pics shown above are taken from version 2 of the device (which includes 2 LEDs to indicate whether the device is functioning (Green LED) and whether the device has been triggered (Red LED).
Potential Usages
Specifications
Trigger Range:
- 1cm ~ 300cm.
Beam Angle:
- Approximately 30 degrees from the point of origin.
Audio Capacity:
- SD Card Storage Capacity: Up to 32GB;
- Audio Format: MP3, WAV;
- Sample Rate: 8K ~ 48K;
- Bit Rate: 8K ~ 320Kbps.
Network Interface:
- 802.11 b/g/n WiFi.
Alarm (local):
- Playback pre-recorded audio via built-in / external speaker;
- Switch on external warning device (light, buzzer, etc.) via dry contact.
Alarm (via internet):
- Email;
- Instant Message (Telegram).
Input Power:
- DC 5V / 1A.
Dimension:
- 125mm x 80mm x 32mm.
The following parameters could be edited by the device administrator to meet different application needs.
Message Example
I/O Interface
Front I/O Interface Description
Power and Volume Control
External Speaker Connector, Previous and Next Buttons
Dry Contact Output Connector, Sensor Detection Range Adjustment
Dry Contact Output Wiring Reference
Rear I/O Interface Description
Additional Offer - Backend Management System
The device's ability to be connected to the Internet opens up door to many possibilities. Please visit the site below for a cloud-based messaging system that uses Telegram as the client-side App. This cloud system was developed to simplify the routing and setting of trigger message.
https://wei48221.blogspot.com/2019/10/cloud-based-messaging-system-with.html
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