Motion Activated Entrance Alert Sends Signal up to 1,000 Ft. by Safeguard Supply


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The LRA-MSTX is an indoor rated passive infrared sensor for use with the LRA series of products. Great for businesses, this sensor will transmit a wireless signal up to 1,000 to a compatible LRA receiver.

GTIN: 635963263560 SKU: LRA-MSTX

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State of the art indoor passive infrared (PIR) motion sensor used to detect entrance into a facility.  Works great in areas where interference from metal or concrete may interfere with magnetic door / window contact. This sensor is triggered with a combination of heat and movement are detected by the sensor.   When triggered, the sensor will transmit a wireless signal to compatible receivers in the LRA series such as the LRA-DCRX Strobe Receiver, LRA-VPRX Portable Receiver that Vibrates, and the new arrivals by Safeguard Supply, the LRA-DCRXS Plug-in Strobe Receiver, and the LRA-DCRXA Battery Operated Receiver.

Product Features

  • Small, compact unit: dimensions: 3.56”(H) x 1.93”(D) x 2.48” (W)
  • Powered by  a Powerful, long lasting CR123a Lithium battery (included)
  • Passive infrared sensor detects movement and heat
  • Detects motion up to 20 ft. at /- 30 degrees
  • Transmits signal up to 1000 feet (line of site) to compatible receiver such as the LRA-DCRX and LRA-VPRX.
  • Manufactured by Safeguard Supply
  • 1 Year Manufacturer’s Warranty

Additional information




Safeguard Supply


1 Year

Sensor Type

Passive-Infrared (PIR)

Wireless Range

1000 ft.

Wireless Features



Safeguard Supply – LRA Series

Best Use

Large Homes – Medium Sized Business

Kit Or Accessory

Transmitter Only

Customer Reviews

Based on 215 reviews
J.G. (Rockwall, US)
Wow this is really bright

I purchased this flashing door chime to communicate between rooms during funeral services so the person in our music room knows when to start the music. This flasher is extremely bright. There is no way to miss it or ignore it if you are in the same room.

I needed a silent device so I have not tested the chimes. I strongly recommend this if you need a flashing signal that can be activated remotely.

j. (Dunlap, US)
Very Good Product- Could be louder

We purchased and installed this doorbell and two extra receiver units about 4 days ago for a relative with a profound hearing loss. It performed as advertised. The flashing light is bright and continues to flash for 15 seconds or so after the tone stops. Would suggest keeping the tone announcement operating the entire times the light is flashing, to possibly add a voice announcement "doorbell" and to make the volume on the tones still louder. We have three receivers in a 1400 square foot ranch house and the tones are still not heard. we are planning to add three more receivers, almost one of every room. The transmitter button seems to be well made. We will have to see about the coin cell life in the transmitter

J. (Arnold, US)
Easier Than Changing Batteries

Compact. Plenty of cord length to move receiver away from outlet so that you have room for other plug in devices. Quick delivery.

M.L. (Plymouth, US)
Works Great

Has a very broad detection area, so we narrowed it with tape. Works perfectly.

D.G. (Avon Park, US)
Doorbell extender

Mine stopped working after a year or two. Called the company and they sent me a new one immediately with no charge. Can't beat that. Only complaint is it's impossible to get back into the little transmitter box once you close the cover.

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