ESL 771KIT Smoke Detector, Projected Beam, Transmitter, Receiver










Smoke Detector, Projected Beam, Low-Profile Transmitter & Receiver, Ground-Level Control Included, 24VDC

Discontinued per Manufacturer -  No Longer Available


The 770 series projected beam smoke detector is intended for industrial and commercial applications. It consists of a optical transmitter that projects a pulsing infrared light beam to a receiver unit. The beam is then continuously analyzed for smoke by the 770 series control panel located at ground level. The control panel connects to a UL Listed FACP. The beam covers an area up to 330 feet by 50 feet.

The 770 series smoke detector allows the installation of just one smoke detector in applications where two or more spot sensors would normally be required, such as a hallway. When smoke is present in the beam path for a period of 8 to 10 seconds, a fire relay is activated. The smoke sensitivity level can be selected to suit different environmental needs. Settings of 25%, 35% and 50% are available.

The 770 series smoke detector automatically resets once a trouble condition is no longer present and builtin drift compensation provides advanced immunity to false alarms.  

Alarm Current Consumption[Nominal]
20.0 mA
Beam Controls[Nominal]
Control Panel Height[Nominal]
8.5 in
Control Panel Length[Nominal]
10.5 in
Control Panel Width[Nominal]
3.5 in
Field Wiring Size[Minimum]
14.0 AWG
Field Wiring Size[Maximum]
24.0 AWG
Operating Humidity[Minimum]
0.0 % RH
Operating Humidity[Maximum]
93.0 % RH
Operating Temperature[Minimum]
-4.0 °F
Operating Temperature[Maximum]
131.0 °F
Operating Voltage[Minimum]
13.5 V
Operating Voltage[Maximum]
28.0 V
Receiver (Beam Tolerance to Misalignment)[Minimum]
-4.0 °
Receiver (Beam Tolerance to Misalignment)[Maximum]
4.0 °
Receiver w/ Bracket Height[Nominal]
4.0 in
Receiver w/ Bracket Length[Nominal]
3.25 in
Receiver w/ bracket Weight[Nominal]
12.0 oz
Receiver w/ Bracket Width[Nominal]
3.75 in
Regulatory Approval
Relay @ Contact Rating
0.0 A @ 24.0 V
Reset Time[Maximum]
5.0 s
RFI Immunity @ ..
10.0 V/m @ 1.0 GHz
Sensitivity - Photoelectric[Minimum]
25.0 %
Sensitivity - Photoelectric[Maximum]
50.0 %
Sensitivity - Photoelectric[Nominal]
35.0 %
Standby Current Consumption[Nominal]
13.0 mA
Transmitter w/ Bracket Height[Nominal]
4.0 in
Transmitter w/ Bracket Length[Nominal]
3.25 in
Transmitter w/ Bracket Width[Nominal]
3.75 in
  • Model: ESL 771KIT
  • 0 Units in Stock
  • Manufactured by: ESL

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