Vibration Detector

Name: Vibration Detector
Brand: Dahua
SKU: ARD421

Stock Code: ARD421

Detects vibration on walls and enclosures and reports drilling and cutting attempts.

A vibration detector with a piezoelectric ceramics sensor that watches mechanical vibration and temperature change at the same time. It reports drilling, cutting and explosion attempts on enclosures, walls and steel surfaces to the panel over a wired alarm output.

9–15 VDCSupply Voltage

1.2 WPower Consumption

18 mAOperating Current

15 mAAlarm Current

5Sensitivity Levels

Zinc-aluminum alloyCasing Material

Key features

Piezoelectric ceramics sensorIt weighs mechanical vibration together with the change measured by the temperature sensor.

Drilling and cutting detectionIt tells apart vibrations from impacts, electric drills, impact drivers, gas cutting and explosions.

Detection in concreteIt alarms when vibration reaches a depth of 2-8 m, and an explosion triggers the alarm at once.

Detection on steelIt alarms at a depth of 1-10 m for impact drivers, and 1-12 m for other objects that strike the area 5 times.

Temperature alarmIt alarms when the temperature climbs 10° within 30 seconds.

Low supply warningIt alarms when the supply voltage drops below 8 V.

It sets the alarm output as normally open or normally closed; the factory setting is normally closed.

Technical Specifications
Port	Connects to 1 channel (dry contact, max potential of 12 VDC and 0.11 A)
Indicator Light	One two-color LED indicator
Tamper	Yes
Sensor	Piezoelectric ceramics sensor and temperature sensor
Detection Mode	Detection of mechanical vibrations and temperatures
Sensitivity	5 adjustable sensitivity levels
Detection Range	Concrete: Alarms are triggered when vibrations reach a depth of 2 to 8 m from impact drivers or other objects striking the area. For other objects, they have to hit the area 5 times first. Explosions immediately trigger alarms. Steel Plate: Alarms are triggered when vibrations reach a depth of 1 to 10 m from impact drivers, and a depth of 1 to 12 m when other objects strike the area at least 5 times. Explosions immediately trigger alarms.
Relay	Default: Normally Closed
Operating Current	18 mA
Alarm Current	15 mA
Power Supply	9–15 VDC
Power Consumption	≤1.2 W
Operating Temperature	–25 °C to 55 °C (–13 °F to 131 °F)
Operating Humidity	0%–95% (non-condensing)
Product Dimensions	85 mm × 37 mm × 28 mm (3.35" × 1.46" × 1.10") (L × W × H)
Net Weight	395 g (0.87 lb)
Gross Weight	436 g (0.96 lb)
Installation	Wall mount
Casing Material	Zinc–aluminum alloy
Certifications	CE
Anti-corrosion Level	Basic Protection
Storage Temperature	–40 °C to 70 °C (–40 °F to 158 °F)
Storage Humidity	0%–95% (non-condensing)
Packaging Dimensions	106 mm × 100 mm × 41 mm (4.17" × 3.94" × 1.61") (L × W × H)

Datasheet

ARD421

12/16/2026

Kullanım Kılavuzu

ARD421

12/16/2026

Teknik Çizim

ARD421

12/16/2026

Vibration Detector

Stock Code: ARD421

Detects vibration on walls and enclosures and reports drilling and cutting attempts.

9–15 VDCSupply Voltage

1.2 WPower Consumption

18 mAOperating Current

15 mAAlarm Current

5Sensitivity Levels

Zinc-aluminum alloyCasing Material

Key features

Piezoelectric ceramics sensorIt weighs mechanical vibration together with the change measured by the temperature sensor.

Drilling and cutting detectionIt tells apart vibrations from impacts, electric drills, impact drivers, gas cutting and explosions.

Detection in concreteIt alarms when vibration reaches a depth of 2-8 m, and an explosion triggers the alarm at once.

Detection on steelIt alarms at a depth of 1-10 m for impact drivers, and 1-12 m for other objects that strike the area 5 times.

Temperature alarmIt alarms when the temperature climbs 10° within 30 seconds.

Low supply warningIt alarms when the supply voltage drops below 8 V.

It sets the alarm output as normally open or normally closed; the factory setting is normally closed.

Technical Specifications
Port	Connects to 1 channel (dry contact, max potential of 12 VDC and 0.11 A)
Indicator Light	One two-color LED indicator
Tamper	Yes
Sensor	Piezoelectric ceramics sensor and temperature sensor
Detection Mode	Detection of mechanical vibrations and temperatures
Sensitivity	5 adjustable sensitivity levels
Detection Range	Concrete: Alarms are triggered when vibrations reach a depth of 2 to 8 m from impact drivers or other objects striking the area. For other objects, they have to hit the area 5 times first. Explosions immediately trigger alarms. Steel Plate: Alarms are triggered when vibrations reach a depth of 1 to 10 m from impact drivers, and a depth of 1 to 12 m when other objects strike the area at least 5 times. Explosions immediately trigger alarms.
Relay	Default: Normally Closed
Operating Current	18 mA
Alarm Current	15 mA
Power Supply	9–15 VDC
Power Consumption	≤1.2 W
Operating Temperature	–25 °C to 55 °C (–13 °F to 131 °F)
Operating Humidity	0%–95% (non-condensing)
Product Dimensions	85 mm × 37 mm × 28 mm (3.35" × 1.46" × 1.10") (L × W × H)
Net Weight	395 g (0.87 lb)
Gross Weight	436 g (0.96 lb)
Installation	Wall mount
Casing Material	Zinc–aluminum alloy
Certifications	CE
Anti-corrosion Level	Basic Protection
Storage Temperature	–40 °C to 70 °C (–40 °F to 158 °F)
Storage Humidity	0%–95% (non-condensing)
Packaging Dimensions	106 mm × 100 mm × 41 mm (4.17" × 3.94" × 1.61") (L × W × H)