System Sensor D4120 patented sampling tube installs from front or back of the detector with no tools required, Increased wiring space with a newly added ¾-inch conduit knockout. Furthermore, one easy-access Test/Reset button and improved led status.
Also, patented interconnect feature for multi-fan shutdown. A plug-in sensor head offers improved false alarm immunity and simple installation, testing, and maintenance.
Furthermore, an improved cover design isolates the sensor head from the low-flow feature for simple maintenance. System Sensor D4120 4-Wire Photoelectric, integrated low-flow technology.
An easy-access Test/Reset button makes it possible to test the unit with the cover on. Additionally, three DIP switches can be used to configure field selectable settings: cover tamper delay, number of sensors to be controlled, and shut down on trouble option. Power boars have two LEDs. They can be used to indicate the status of connected sensors, as well as a quick reference imprinted on the cover explains the LED status indications. 4°F to 158°F Operating Temp.0% to 95% relative humidity. Download the Specification sheet in. UPS Next Day Air Saver. Please be aware that we are not authorized distributors. This item is in the category "Business & Industrial\Facility Maintenance & Safety\Fire Protection Equipment\Fire Alarms". The seller is "silver-yiyi" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, Korea, South, Indonesia, Taiwan, South Africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Croatia, Republic of, Malaysia, Chile, Colombia, Costa Rica, Panama, Trinidad and Tobago, Guatemala, Honduras, Jamaica, Antigua and Barbuda, Aruba, Belize, Dominica, Grenada, Saint Kitts-Nevis, Saint Lucia, Montserrat, Turks and Caicos Islands, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Ecuador, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Vietnam, Uruguay.