INFWIN ALS20 Ambient Light Sensor, Illuminance Transmitter
MCCI P/N
123004242
INFWIN P/N
ALS20-FAC002
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$ 59.00
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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
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) |
Default Variant: ALS20-FAC002
| Illuminance range | 0–200000 lux |
| Power supply | 3.9–30V DC |
| Output interface | RS485, Modbus-RTU |
| Cable length | 2 meters |
Custom variants (illuminance range, power supply, output interface, cable length) are available; contact us to discuss your requirements.