Sentinel - BLC-1a Basic Lighting Controller (Plug Box Version) (BLC-1A PB) (703224)

Model: 703224

The BLC-1a comes in two versions, "Plug Box" and "Wall Mount" -- this version is the Plug Box/PB version.

The BLC-1a Lighting Temperature Protection by Sentinel is designed to disconnect power to lighting equipment in gardens, greenhouses and grow rooms if temperatures exceed a user determined level due to equipment failures, extreme weather etc. The unit also features a "Hot Start" delay, allowing equipment and lighting to cool down before restarting in the event of a power outage (lighting restarting too quickly after a power interruption is bad for ballasts and lamps).

The BLC-1a features 3 function LEDs, letting users know if the controller has main power, if the controller is in operation, and whether the controller has entered protection mode due to a high temperature event.

The BLC-1a controller is ETL listed in the USA and Canada, RoHS compliant, and features durable construction built to withstand high impacts and provide years of reliable performance.


  • Premium Wall Mount version includes 6.5' (2m) grounded power cable, sturdy bracket and mounting hardware.
  • Budget-friendly Plugbox version mounts directly to standard NEMA 5-15 120v receptacle.
  • Backed by the Sentinel GPS full 2 year warranty.


Input Power 120V / 60hz .1A
Output Power 120V / 60Hz 15A 1/3 HP
Power Inlet NEMA 5-15
Temperature Storage Range 15°F(-10°C) to 140°F(60°C)
Temperature Control Range 65°F(19°C) to 115°F(46°C)
Timer Delay Range 0 seconds to 20 minutes
Sensor Cable Length 6.5' (2m)
Dimensions 4.8" (122mm) H x 2.75" (70mm) W x 4.1" (103.5mm) D
Weight 0.7 lbs (0.3kg)
Weight: 0.7 lb.
Dimensions: 2.75in. × 4.1in. × 4.8in.
List Price: $74.95