Potter Electric Signal (RTS-O) Room temperature switch

The Potter Electric Signal RTS-O is a low-temperature room sensor for dry-pipe sprinkler protection. It closes a normally open contact when room temperature drops below 40°F (4.5°C).

First, the bi-metallic sensor detects the threshold crossing. Then the contact closes and signals the supervisory or monitoring circuit. As a result, the building management or fire alarm system can warn of freeze risk before a dry-pipe valve or water-filled line is damaged. In addition, the switch resets automatically when room temperature climbs back above 40°F.

Potter Electric Signal RTS-O Key Features

• Normally open contact closes below 40°F (4.5°C); resets automatically above 40°F
• Bi-metallic sensor sealed in an epoxy-filled stainless steel case
• White ABS enclosure for clean appearance in finished rooms
• Surface-mount installation with screw terminals
• Complies with NFPA 13 and NFPA 72 requirements for a 40°F room-temperature switch protecting dry-pipe valves
• No periodic maintenance required beyond keeping vent holes clear

Specifications

• Activation temperature: closes below 40°F (4.5°C)
• Contact configuration: normally open (closes on low temp)
• Contact material: silver clad
• Electrical rating: 1 A at 24 VDC
• Terminals: screw terminals
• Enclosure: white ABS, 2-1/16″ W × 3-7/16″ L × 1-1/4″ H
• Sensor: epoxy-sealed stainless steel case with bi-metallic mechanism
• Mounting: surface

Where the RTS-O Is Used

Specifically, the RTS-O is installed in spaces that house dry-pipe sprinkler valves or wet sprinkler piping that could freeze. For example, unheated mechanical rooms, valve rooms, attic spaces, and entry vestibules in cold climates all benefit from a 40°F supervisory switch.

For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com