INFWIN ALS20-Ambient Light Sensor, Illuminance Transmitter

$ 59.00 USD

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INFWIN P/N ALS20-FAC002

Quantity

SKU:123004242

Out of stock — Available on backorder

The INFWIN ALS20 is an ambient light sensor (illuminance transmitter) with RS485/Modbus-RTU, analog voltage, or analog current output. Each unit is individually calibrated for excellent accuracy and consistency. Illuminance range, power supply, output interface, and cable length are configurable via ordering code - the default variant (ALS20-FAC002) ships with a 0–200000 lux range, RS485/Modbus-RTU output, 3.9–30V DC supply, and a 2 m cable.

A spring-loaded mounting bracket with a built-in level indicator makes it straightforward to install the sensor level and pointed skyward. Reverse power protection and built-in TVS/ESD protection are included.

Key Features

Individually calibrated: Each sensor calibrated at the factory for high accuracy and consistency across units
Flexible output interface: RS485/Modbus-RTU, RS485 + analog voltage, RS485 + analog current, analog voltage 0–2V, analog current 4–20mA, or SDI-12 (see ordering code)
Wide range of illuminance options: Six fixed full-scale ranges from 2000 lux up to 200000 lux, plus a customizable range
Level indicator and spring-loaded mount: Simplifies accurate, level installation
Weatherproof: IP66 rated for direct outdoor use
Wide operating range: −40°C to +85°C
Reverse power protection: Built-in TVS/ESD protection
RS485 Modbus-RTU protocol: Standard Modbus register map; configurable slave address, baud rate, parity, and stop bits
Configuration utility: SensorOneSet software included for sensor configuration via RS485
Cable length: 2 m standard; custom lengths available

Applications

Scientific research
Solar power monitoring
Greenhouse and horticultural lighting management
Weather stations
LoRaWAN IoT deployments via the Catena-5310 or compatible RS485/Modbus-RTU gateway

Important Notes

Accuracy is ±5% for the 2000–100000 lux ranges and ±6% for the 200000 lux range.
Directional (cosine) error increases sharply off-axis: ±3% at 30° incidence, ±6% at 60°, and ±24% at 80° - mount the sensor level for best accuracy.
4–20mA output requires 12–30V DC supply; the 3.9–30V DC and 2.7–16V DC supply options are not compatible with 4–20mA output.
Mounts via three screw holes.

Specifications

Illuminance
Range (selectable)	0–2000, 0–5000, 0–10000, 0–20000, 0–100000, or 0–200000 lux
Resolution	1 lux
Accuracy	±5% (2000–100000 lux ranges); ±6% (200000 lux range)
Directional (cosine) error	±3% at 30°; ±6% at 60°; ±24% at 80°
Output Interface (selectable)
RS485 Modbus-RTU	Default for ALS20-FAC002
Analog voltage	0–2V (output resistance ~0 Ω)
Analog current	4–20mA (load resistor <500 Ω)
SDI-12	Available as ordering option
Power Supply (per output type)
RS485 / Analog voltage	3.9–30V DC (7mA @ 24V DC)
Analog current 4–20mA	12–30V DC (30mA @ 24V DC, with 20mA output signal)
Low-power option	2.7–16V DC (not applicable for 4–20mA output)
Mechanical
Dimensions	75 × 55 × 58 mm
IP rating	IP66
Installation	3 × screw hole mounting, spring-loaded with level indicator
Cable length	2 m standard; custom length available
Environmental
Operating temperature	−40°C to +85°C

Ordering Code Guide

Code 1: Product Series	ALS20	ALS20 ambient light sensor
Code 2: Range	A B C D E F G	0–2000 lux 0–5000 lux 0–10000 lux 0–20000 lux 0–100000 lux 0–200000 lux Customize
Code 3: Power Supply	A B	3.9–30V DC 2.7–16V DC
Code 4: Output Interface	A B C D E F G	Analog Voltage 0–2V Analog Current 4–20mA RS485, Modbus-RTU RS485, Modbus-RTU + Analog Voltage 0–2V RS485, Modbus-RTU + Analog Current 4–20mA SDI-12 Customize
Code 5: Cable Length	002 XXX	2 meters Custom (XXX = length in meters, e.g. 005 = 5 m)