For the best Gemaire experience, please update your web browser.
  • GEM+Rewards

System Sensor 2D51 - Photoelectronic Low-Profile Plug-In Detector for Special Applications

Item: 2D51
MFR: 2D51

This product is no longer available for purchase.

Comparable Products


Photoelectronic Low-Profile Plug-In Detector for Special Applications. For Pendent Mount Applications Where Remote Testing Is Needed, The 2D51 Needs To Be Used With the DP4P120 And B210LP. Specifically For Use In No-Flow/Low-Flow Air-Handling Systems. The Twist-In/Twist-Out Head Allows Easy Removal From The Base For Quick Cleaning And Maintenance. The 2D51 Heads Can Be Locally Tested Using A Magnet or By Using the Test/Reset Push Button On The D4P120 Power Board.


NameSystem Sensor 2D51 - Photoelectronic Low-Profile Plug-In Detector for Special Applications
Gemaire Item Number2D51
Manufacturer Product Number2D51
SKU - PIM Number1364408732770
ERP Number255267
Unit of MeasureEA
Weight0.3 Pounds (Lb)
Length4.1 Inches (In)
Width4.1 Inches (In)
Height2.0 Inches (In)
Country of OriginMEX
BrandSystem Sensor
Voltage24/120 VAC
Power SourceDC
Batteries IncludedNo
Hush ButtonNo
Test ButtonNo
Audible AlertNo
Battery BackupNo
Batteries RequiredNo
Detection MethodPhotoelectric
Sensor TypePhotoelectric
ApplicationDuct Smoke Detection
ApprovalsUL, FM, CSFM
Interconnection CapabilityNo
Locking PinNo
MountingTwist in twist out
Operating Temperature Range-4°F to 158°F (-20°C to 70°C)
StandardsUL, FM, CSFM
Terminal ConnectionYes
TypeSmoke Detector
Visual AlertNo
Warranty OfferedYes
Wire GaugeUp to 12 AWG
CUL ListedNo
UL ListedYes
UL RecognizedNo
Operating Temperature14°F to 140°F (-10°C to 60°C)
GEM - Case Quantity


Parts List