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The THERMOFLEX® product group includes standard detectors that have the additional feature of terminal protection from water and condensation. Each MP detector is available in single or multiple circuits with Normally Open and/or Normally Closed contact configurations, and any of the fixed temperature settings including 135º, 165º, 200º and 285º F.

 

Shown at left is a Modified Pigtail Detector, typical Normally Open, one pair of white pigtails connected to one side of the contact, the black pair connected to the other side to provide "in-out" connections to a Fire Alarm initiating circuit. Two single blue wires (not shown) indicate a Normally Closed set of contacts.

 

 

 

The Model CR 135 MP is a combination Rate-of-Rise and Fixed Temperature detector. A set of normally open contacts will close when the ceiling temperature increases at a (minimum) rate of 8.4 Celsius degrees (15 F. Degrees) per minute. Closing the contacts initiates the fire alarm sequence. Independent of the rate-of-rise operation, the fixed temperature portion consists of a spring-loaded plunger retained by a fusible alloy that releases when the ceiling temperature reaches 57º Celsius, (135º F). When released, the plunger strikes the contacts and holds them closed.
Spacing on an uninterrupted ceiling is 70' (22 m) for the rate-of-rise operation. ; 40' (12.5 m) for fixed temperature portion.-->

The Model CF 135 MP is a Fixed Temperature Only detector. The fixed temperature portion consists of a spring-loaded plunger retained by a fusible alloy that releases when the ceiling temperature reaches 57º Celsius, (135º F). When released, the plunger strikes a normally open set of contacts and holds them closed. Spacing on an uninterrupted ceiling is 40' (22.5 m).
The CF 135 is identified by a black dot on its heat collector fin.

The Model CR 200 MP is a combination Rate-of-Rise and Fixed Temperature detector that operates in the same way as the CR 135, with the exception that the fixed temperature portion releases when the ceiling temperature reaches 93º Celsius, (200º F). Spacing on an uninterrupted ceiling is 70' (22 meters) for the rate-of-rise, and 25' (7.62 meters) for the fixed temperature portion (a reduced spacing parameter from the CF 135.)
The CR 200 is identified by a white dot on its heat collector fin.

The Model CF 200 MP is a Fixed Temperature Only detector. The fixed temperature portion releases when the ceiling temperature reaches 93º Celsius, (200º F). Spacing is 25', (7.62 Meters).
The CF 200 is identified by a black dot and a white dot on the heat collector fin.

Contact Configurations Any Detector in the MP Series is available in Normally Open (by far the most common) or Normally Closed, or Multiple Circuit configurations (see Spec. Sheet #3). The Model Number does not reflect the Normally Open configuration, however the letter "C" denotes Normally Closed.

For example: "CR 135 C MP" describes a rate-of-rise / fixed temperature detector, fusing at 135º F., with Normally Closed contacts, assembled with the modified pigtail seal assembly.

Engineering Specification: THERMOFLEX® MP-type detectors shall be installed in areas where corrosive elements exist or washing of walls and ceiling surfaces is commonplace. The fixed temperature portion and the rate-of-rise operation shall be determined by the ambient temperature. THERMOFLEX® MP-type detectors shall be installed in areas where environmental conditions including dust, vapours, insects, etc., would cause an ionization or photoelectric type detector to initiate a false alarm.

Contact Rating: Dimensions Weight
3A @ 125 VAC * 1A @ 25 VDC * 0.3A @ 125 VDC 0.1A @ 250 VDC Diameter: 4 3/8" (11.11 cm)
Height: 2.0" (4.85 cm) 		0.41 lb. (330 g)