Home / Detectors / Accessories / Siemens ISI-1 Siemens ISI-1 Isolator Package Request a Quote This product is already on your Quote Request Browse your Quote Request Factory NewBrand: Siemens FireAlarm.com Part #: 121723 Categories: Accessories, Detectors Manufacturer Part #: ISI-1Secondary Part #: 500-694270 Specifications Resources Information Weight 1.00 lbs Manufacturer Siemens Industry, Inc. Brand Siemens Condition New Unit of Measurement EA (Each) Production Status Active