System Sensor 2D51 Detector

The 2D51 photo electronic detector uses a state-of-the-art optical sensing chamber. This detector is designed to provide protection in duct applications when installed with an Innovair Flex 4-wire duct smoke detector housing and to be used with compatible UL listed control panels only. Two LEDs on each detector provide local visible alarm indication. They flash every five seconds indicating that power is applied and the detector is working properly. The LEDs latch on in alarm. LEDs will be off when a trouble condition exists indicating that the detector sensitivity is outside the listed limit. The alarm can be reset by a momentary power interruption, test/reset button, or remote test accessory with reset function. This detector may be tested by activating the internal reed switch with a magnet, test/reset button, or remote test accessory.

Order Processing: After your payment is authorized and verified, we will start processing your order and this process can take from 1 to 2 business days, so please be patient with us. If we are unable to process your order due to inaccurate or incomplete payment or incorrect address information, your order processing may be delayed.

Carrier: UPS/FedEx/USPS. Delivery Timescale: More than 90% of orders arrive in 10 business days after despatch.

FREE RETURNS on all orders!
The following conditions must be met:

1. Items must be returned within 30 days after the purchase date.
2. Items must be unworn, undamaged and in original packaging.