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BAPI BA/LLV-20-LX[0 TO 2000] : Outdoor Light Level Sensor, 4 to 20 mA Output, 0 to 2,000 Lux Range, IP66 / NEMA 4, 1/2 in NPSM Mount

BAPI BA/LLV-20-LX[0 TO 2000] : Outdoor Light Level Sensor, 4 to 20 mA Output, 0 to 2,000 Lux Range, IP66 / NEMA 4, 1/2 in NPSM Mount

BAPI

MSRP: $275.00
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BA/LLV-20-LX[0 TO 2000]
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Output4 to 20 mA
Range0 to 2,000 lux
Power Supply12 to 28 VDC, 22 mA max
Accuracy10 Lux ±10% of reading
EnclosureIP66, NEMA 4
Mounting1/2 in NPSM thread
The BAPI BA/LLV-20-LX[0 TO 2000] is an outdoor light level sensor that measures ambient light across a 0 to 2,000 lux range and sends a 4 to 20 mA signal to a building automation controller analog input. It lets the controller shut lighting off when daylight exceeds a set level and turn it back on when light falls below it, from a watertight UV-inhibited polycarbonate IP66, NEMA 4 enclosure that threads into a 1/2 in conduit fitting.

Specifications from the BAPI Outdoor Light Level Sensor datasheet (Rev. 07/16/24) and Installation and Operating Instructions 38244_ins_Light_Level (rev. 07/17/24), with warranty terms from BAPI's published terms and conditions, reviewed October 6, 2026.

The BAPI Outdoor Light Level Sensor conserves energy by allowing lights to be shut off when the ambient light level exceeds a specified level, and helps keep sites safe by allowing lights to be turned on when ambient light falls below a specified level. The BA/LLV-20-LX[0 TO 2000] is the 4 to 20 mA output version with a 0 to 2,000 lux range. It mounts on top of a building or structure in direct sunlight with a north-facing orientation, and its base carries 1/2 in NPSM threads that screw into a conduit fitting.

Best For

  • Outdoor and parking lot lighting control that switches lights off when ambient light exceeds a set level and back on when it falls below
  • Building automation controllers with a 4 to 20 mA analog input
  • Mounting on top of a building or structure in direct sunlight, facing north, threaded into a 1/2 in conduit fitting
  • Exterior exposure from -40 to 185°F in an IP66, NEMA 4 enclosure

Warranty

5-Year BAPI Warranty. BAPI warrants this sensor against defects in materials and workmanship for five years from the date of sale and will repair or replace products found defective within that period, subject to BAPI's terms and conditions. Contact ZOT Supply at sales@zotsupply.com or 855-825-2811 for warranty or application support.

Key Features

4 to 20 mA Output

Analog 4 to 20 mA signal across a 0 to 2,000 lux range to a controller analog input.

Responds in Dim Light

Sensitive even in dim lighting, below 10 foot candles (108 lux).

IP66, NEMA 4 Enclosure

Rugged, watertight UV-inhibited polycarbonate housing rated UL94 V-0.

1/2 in NPSM Conduit Mount

Threaded base screws directly into a conduit fitting.

-40 to 185°F Operation

Operating range -40 to 185°F (-40 to 85°C), 0 to 100% non-condensing humidity.

Sealed Field Terminations

Supplied sealant filled connectors for field terminations.

Authorized Distributor

ZOT Supply is an authorized distributor of BAPI products.

Technical Specifications

Product TypeOutdoor light level sensor
Part NumberBA/LLV-20-LX[0 TO 2000]
Output Signal4 to 20 mA
Measurement Range0 to 2,000 lux
Power Supply12 to 28 VDC, 22 mA max
Termination: Red Wire12 to 28 VDC
Termination: Black Wire4 to 20 mA signal to controller analog input
Termination: White or Green WireNot used
Accuracy10 Lux ±10% of reading
Dim Light Sensitivity<10 foot candle or 108 lux
Operating Temperature-40 to 185°F (-40 to 85°C)
Operating Humidity0 to 100%, non-condensing
Enclosure MaterialUV-inhibited polycarbonate
Enclosure RatingIP66, NEMA 4
Material RatingUL94 V-0, UL746C
Mounting1/2 in NPSM threads on the base, screws into a conduit fitting
Overall Height3.37 in (85.5 mm)
Field TerminationsSealant filled connectors supplied

Documentation

PDF documentOutdoor Light Level Sensor Datasheet (Rev. 07/16/24)
PDF documentOutdoor Light Level Sensor Installation and Operating Instructions (rev. 07/17/24)

Frequently Asked Questions

What output does the BAPI BA/LLV-20-LX[0 TO 2000] provide?

A 4 to 20 mA analog output across a 0 to 2,000 lux measurement range, wired to a controller analog input.

What power supply does the BA/LLV-20-LX[0 TO 2000] need?

12 to 28 VDC, 22 mA max for the 4 to 20 mA output.

How is the BA/LLV-20-LX[0 TO 2000] wired?

Red wire to 12 to 28 VDC and the black wire carries the 4 to 20 mA signal to the controller analog input. The white or green wire is not used. BAPI recommends the supplied sealant filled connectors for field terminations.

Where should an outdoor light level sensor be mounted?

On top of the building or structure in direct sunlight, facing north. Keep it at least 24 in from the wall, clear of awnings or other projections within 15 ft, and away from building corners. If it cannot be roof mounted with an unobstructed view of the horizon, keep it away from economizers, intake or exhaust fans, barometric dampers and other reflective surfaces.

How does the BA/LLV-20-LX[0 TO 2000] mount?

The base has 1/2 in NPSM threads that screw into a conduit fitting.

How accurate is the BA/LLV-20-LX[0 TO 2000] in low light?

Accuracy is 10 Lux ±10% of reading, and the sensor responds in dim lighting below 10 foot candles (108 lux).

How do foot candles convert to lux?

One foot candle equals 10.76 lux, and one lux equals 0.0929 foot candles. The BA/LLV-20-LX[0 TO 2000] reads in lux; BAPI builds the same sensor with a 0 to 875 foot candle range as a separate part number, and custom ranges are available from BAPI in either unit.

What warranty covers the BA/LLV-20-LX[0 TO 2000]?

BAPI warrants the sensor against defects in materials and workmanship for five years from the date of sale, and repairs or replaces products found defective within that period under BAPI's terms and conditions.

How is the sensor maintained?

Inspect the sensor window regularly and keep it free of debris. Clean it with a wet rag or glass cleaner. If readings are off, verify the termination and supply voltage and confirm the window is clean and pointing north.

5 years from date of sale (BAPI)
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