Home / Detectors / Heat Detectors / Secutron MRI-5251B Secutron MRI-5251B $67.35 Low Profile Intelligent Thermal Sensor, FT 135F Plug-in (Requires a Low Profile 200 Series Base) Availability: Please Call for Lead Time Secutron MRI-5251B quantity Add to cart Request a Quote This product is already on your Quote Request Browse your Quote Request Factory NewBrand: Secutron FireAlarm.com Part #: 81019 Category: Heat Detectors Manufacturer Part #: MRI-5251B Specifications Information Weight 1.00 lbs Brand Secutron Condition New