Product Details Portlet

D7A Automatic Horizontal Vibration Sensor

Quickly Detect Earthquakes to Help Prevent Secondary Disasters. Auto-level Mechanism Enables Mounting at ±5°.

  • Auto-level mechanism for mounting leeway of ±5°.
  • Models provided for mounting to horizontal PCBs, vertical PCBs, or with screws.
RoHS Compliant
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Note: This web page provides an excerpt from a datasheet. Refer to Product Datasheet and other applicable documents for more information.
Appearance Mounting type Model
Horizontal mount D7A-1
Vertical mount D7A-2
Screw mount D7A-3-1
  Model
Item Type
D7A-1 D7A-2 D7A-3-1
Horizontal mount Vertical mount Screw mount
Operating characteristic Acceleration range 90 to 170 gals*
Output Contact form SPST-NO
Electrical ratings 5 µA to 1mA at 3 VDC
Contact resistance Initial value: 1 Ω max. (measured at terminals)
Basic specifications Electrical life expectancy 10,000 operations (at 10 to 20 operations/min with resistive load of 1 mA at 3 VDC)
Degree of protection IP40 (switch section)
Operating temperature -30 to 70°C (with no icing or condensation)
Storage temperature -30 to 70°C (with no icing or condensation)
Operating humidity 25% to 85%
Dielectric strength 250 VAC, 50/60 Hz for 1 min
* This is the average value of three measurements that were taken with the continuous horizontal vibration method with periods of 0.3 s, 0.5 s, and 0.7s.
Note: Ask your OMRON representative for details.
Unit: mm (inch)
D7A-1
形D7A-□:外形1
Note: Mount the Vibration Sensor to a
PCB with a thickness of 1.6 mm
and solder it.
D7A-2
形D7A-□:外形2
Note: Mount the Vibration Sensor to a
PCB with a thickness of 1.6 mm
and solder it.
D7A-3-1
形D7A-□:外形3
Note: Mount the Vibration Sensor with
M4 mounting screws or the equivalent
and tighten the screws to a
torque of 0.981 to 1.176N·m