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White rectangular wall switch with motion sensor lens and three wire leads

Emerson Sensky BS033 110v Motion Sensor Light Switch White

SKU CH-19Z7-26F72

A 110 V wall switch uses a passive infrared sensor with a 180 degree view and 9 m range to turn lights on and off automatically

  • Connection protocolWireless
  • Product colorWhite
  • Details16 L x 8 W x 5 H centimeters, 119 g, 9 m, Embedded, AC, batt
  • Key featuresEmbedded, 9 m, false
  • Product dimensions14.33 in W × 12.83 in H × 9.06 in D
  • Product weight119 g
  • Automatic on/off saves energy with 180° PIR detection up to 9 metres
  • Adjustable 10-second to 30-minute timer suits any room usage pattern
  • Three modes let you override sensor for manual control
  • Neutral-wire design supports 800 W incandescent or 200 W LED loads at 110 V
  • Compact 70 × 115 × 35 mm fits standard wall boxes

Emerson Sensky BS033 Motion Sensor Switch

The Emerson Sensky BS033 is a 110V motion sensor light switch designed for indoor residential use. It replaces a standard single-pole switch and requires a neutral wire for installation. The unit uses a passive infrared sensor to detect occupancy and ambient light levels. It suits homeowners wanting automatic lighting control in spaces like hallways, closets or garages.

Neutral Wire Installation And Adjustment

Installation needs three wires: black to hot, green to neutral and red to the load. A neutral wire must be present in the wall box or the switch will not function. Time delay adjusts from ten seconds up to seven minutes using the onboard controls. Three modes (AUTO, ON, OFF) let you override the sensor. Incorrect wiring is the most common cause of false alarms or the switch failing to operate.

Best For Single-Pole Indoor Lighting

This switch suits rooms where hands-free lighting saves energy, such as pantries, laundry rooms or stairwells. It supports incandescent loads up to 800W at 110V and energy-saving lamps up to 200W at 110V. Buyers without a neutral wire in the switch box cannot use this model. Builders needing three-way or multi-location control should look at a different solution.

How it compares

Measured against everything we stock in Alarm Kits & Motion Sensors, at today’s prices. Recalculated every night.

Price $28.99
Cheaper than about 57% of the 180 comparable items (median $30.99).

Specifications

Product
Brand nameEmerson
Model nameSensky BS033
Part numberSensky BS033
Product colorWhite
Connectivity
Connection protocolWireless
Power
Built-in batteryNo
Size & build
Product dimensions14.33 in W × 12.83 in H × 9.06 in D
Product weight119 g

Questions about this item

How can I confirm the motion sensor is detecting movement correctly after installation?

Walk through the 180° detection zone at 0.6–1.5 m/s; the light should activate within the 9 m range and remain on for the chosen delay (10 s to 7 min).

What components are included and what must be sourced separately?

The switch unit with black, green and red leads is supplied; a neutral wire in the wall box is required for connection, and no battery is included or needed.

Which load rating should I match to my lighting circuit?

For 110 V circuits choose the 800 W incandescent or 200 W energy-saving lamp rating; for 220–240 V circuits use the 1200 W incandescent or 300 W energy-saving rating.

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