Domus Round Recessed PIR SENSOR 360°

The Domus SENSOR-REC-01 is a recessed 360° PIR occupancy sensor — 240 V AC, 0.5 W, switching up to 300 W of LED load, with a 12 m detection radius and a 30° adjustable tilt.

⛔⛔ Its record says 300 W. The sensor draws half a watt.

• ⭐ The datasheet publishes two wattages: 0.5 W as the sensor's own power consumption, and “Rated Load: Max. 300 W LED” as the load it can switch.
• ⛔ The product's power_watt field publishes 300 W. ⭐ That is the switching capacity, not the consumption. ⭐ A 600-fold overstatement.
• ⭐ THE TWO NUMBERS ANSWER DIFFERENT QUESTIONS.
  • ⭐ 0.5 W is what the sensor costs to run — ⭐ about 4.4 kWh a year, running continuously.
  • ⭐ 300 W is how much lighting it can control — ⭐ which at typical LED loads is a great many fittings.
• ⭐ WE CHECKED THE OTHER SENSORS. ⭐ Of 26 sensor products, one publishes both figures on its sheet — this one — and its field took the rated load. ⭐ So it is a single specific correction rather than a convention.
• ⭐ It also publishes bulb_type = Built-in LED. ⭐ A sensor has no lamp. ⭐ Four of the 26 carry that field.

⭐ 300 W of switching capacity is the figure that decides the design

⭐ It is not a limitation so much as a budget. ⭐ At 10 W per downlight, 300 W is around thirty fittings; at 20 W per batten it is fifteen. ⚠ THE TRAP IS INRUSH, NOT STEADY LOAD. ⭐ LED drivers draw a brief, very high current at switch-on, and a relay rated for 300 W of steady LED can still be damaged by thirty drivers all starting at once. ⭐ If the circuit is near the limit, stage it across two sensors or use a contactor. ⭐ Tell us the fitting count and we will say whether it is comfortable.

⭐ The numbers a designer actually needs

• ⭐⭐ TWO OF THESE ARE ROUTINELY MISSED.
  • ⭐ THE 12 m RANGE IS QUALIFIED “below 24 °C”. ⭐ PIR works by detecting a temperature difference between a body and its background, so a warm room reduces that contrast and the range falls. ⚠ In an Australian summer ceiling space, plan on less than 12 m.
  • ⭐ THE DETECTION SPEED RANGE IS WALKING PACE. ⭐ PIR detects movement across its field, not presence. ⚠ Someone sitting still at a desk can drop below the detection threshold and be switched off on them — ⭐ which is why the 15-minute maximum delay exists and why offices set it long.

⭐ Recessed, tilting, and why that combination is unusual

⭐ Most 360° sensors sit flush and look straight down. ⭐ This one recesses like a small downlight and its eyeball tilts through 30° — ⭐ so it can be aimed along a corridor, at a doorway, or away from a heat source that would otherwise trigger it. ⭐ Aiming away from an air-conditioning outlet, a heater or a west-facing window is the single most effective fix for nuisance triggering, and a fixed sensor cannot do it. ⭐ An optional lens curtain masks part of the field for the same purpose.

⭐ Manual override

⭐ The sheet notes automatic-only and automatic-with-manual-override versions. ⭐ Override matters in rooms where people need the light to stay on or stay off regardless — a meeting room with a projector, a store room being stocktaked. ⭐ Without it, the only way to defeat a sensor is to wave at it. ⭐ Tell us which behaviour you want and we will confirm the version.

✅ What is published

Where it works

• ⭐ Room centres — ⭐ 360° has no blind side.
• ⭐ Corridors and doorways — ⭐ tilt to aim along them.
• ⭐ Where nuisance triggering is a risk — ⭐ tilt away from the heat source.
• ⚠ Not for seated occupancy without a long delay — ⭐ PIR reads movement.
• ⛔ Not outdoors — ⭐ IP20.

Specifying it

Recessed 360° PIR occupancy sensor. 240 V AC, 0.5 W consumption, 300 W maximum LED switching load. 12 m detection at up to 4 m mounting height. 10 sec–15 min delay, <3–2000 lux adjustable threshold. 30° adjustable tilt, optional lens curtain, manual override version available. IP20. 5-year warranty. ⛔⛔ ITS RECORD PUBLISHES 300 W AS THE SENSOR'S POWER. THE SENSOR DRAWS 0.5 W — 300 W is the load it can SWITCH, and the field took the switching capacity as the consumption. A 600-fold overstatement, and one specific correction rather than a convention: of 26 sensors, this is the only one whose sheet publishes both figures. ⭐ TWO SPECS ARE ROUTINELY MISSED: the 12 m range is qualified "below 24 °C" because PIR needs thermal contrast, and the detection speed range is walking pace — a seated person can be switched off on.

Supplied and supported by Lights For You.

Download Datasheet (PDF)