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The SF501 (SF-501) Single Button Call Transmitter pendants features the great range and reliability of 900 MHz in a small, water-resistant package. Users can wear a pendant in the shower or bathtub, outside in the rain, or other environments where the pendant may be splashed with water or momentarily submerged. A single-button design with “press and one-second hold” activation, making the product very easy to use, yet still reduces false alarms. When the SF501 (SF-501) is activated, it continues to send an alarm signal until its reset button, located on the back, is pressed.

The SF501 (SF-501) is especially suited for assisted living installations. Weighing less than 1.4 ounces each, they include both a neck cord and a belt clip, and can easily be converted by the end user. An optional wristband allows a pendant to be worn on the wrist or arm.

The SF501 (SF-501) features a fully supervised RF link to ensure reliability. The built-in LED flashes with all transmissions, including supervision, so the user can see that the transmitter is still functioning. The battery is a customer-replaceable 3V lithium type.




Fully supervised wireless 900MHz transmitter


 Large alarm buttons with alarm activation delay

 Low battery warning before battery depletion

 Flashing LED indicator during alarm activation

Continuous alarm signal until reset button pressed

 Field-replaceable, 3V lithium battery


Dimensions: 2.2"H × 1.9"W × 0.72"D

(56 mm × 48 mm × 18 mm)

Weight: 1.4 oz.

Range: 1 mile, open field

Environment: 0°C–60°C

Battery: 3V Lithium (BA501)


Tek-CARE®500 Wireless Emergency Call System

Click for Spec Sheet

Architects' & Engineers' Specifications:


The wireless call transmitter shall be TekTone® SF501(SF-501)or approved equal as supplied by LEE DAN®. It shall use the 900MHz frequency for signal transmission, and shall include a transmission indicator LED.

No physical wiring connections shall be required to transmit a call. When activated, the SF501 (SF-501) shall continue to send an alarm signal until its reset button, located on the back, is pressed. The transmitter shall also include a neck chain, belt clip and 3V lithium battery. The transmitter shall be no larger than 2.2"×1.9"×0.72" and shall be lightweight enough to be worn comfortably.


TekTone® has designed Tek-CARE®500 to work as a system. Its master station computer has been carefully designed and matched to work with Tek-CARE®500 wireless and wired peripherals. TekTone® will not warrant or support components of Tek-CARE®500 that are purchased separately unless the components are add-ons to previously sold systems. TekTone® will also not warrant or support a system that is a mix of TekTone® and Non-TekTone® parts, unless prior permission has been obtained. A site survey must be performed and submitted before ordering a Tek-CARE®500 system. In order to track our systems and to inform facilities of software upgrades, full site information (site name, address and phone number) will be required when ordering. Site information and master station computer warranty numbers will also be required when requesting technical support.






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This page was last updated December 15, 2010

 Phone: 800-231-1414 or 631-231-1414   Fax: 631-231-1498 E-Mail:

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