1.Product Overview
The IndusKey INK444 Rain and Snow Sensor is a high-tech optoelectronic product designed for the detection of rain and wet snow. It provides a reliable binary precipitation signal (present/absent) for a wide range of applications. Utilizing active infrared optical detection technology, the sensor continuously measures precipitation particle count and optical refraction signals. This results in short response times and high accuracy, making it suitable for long-term field deployment with minimal maintenance requirements.
2.Sensing Technology & Self-Cleaning System
Sensing Technology:
The INK444 operates on the principle of active infrared optical detection. It emits an infrared light source and analyzes the reflected or refracted light to detect the presence of precipitation particles (raindrops or snowflakes). This method allows it to distinguish between different types of precipitation and provides a fast and accurate binary output signal indicating precipitation presence or absence. The sensor features a unique anti-glare optical design, which ensures normal operation even in bright sunlight and all-day conditions.
Robust & Low-Maintenance Design:
While a specific self-cleaning system is not detailed, the INK444 is built for durability and low maintenance. It features an optional micro-power heated detection window, which is crucial for dry-snow sensing at high latitudes and prevents the window from icing over, ensuring continuous and reliable operation in cold climates. The sensor holds an IP65 protection class, signifying a high level of resistance against dust and water jets, which inherently reduces fouling and the need for frequent cleaning. Its robust design and suitability for coastal areas with salt fog resistance further contribute to its low-maintenance profile.
3.Key Features & Competitive Advantages
- Fast and Accurate Detection: The sensor provides rapid response times and high accuracy in detecting the presence or absence of precipitation, which is crucial for time-sensitive applications.
- All-Weather Operation: Its unique anti-glare optical design allows it to operate reliably under all-day conditions, including bright sunlight, which can be a challenge for other optical sensors.
- Specialized for Cold Climates: The optional heated detection window makes it highly effective for detecting dry snow at high latitudes and prevents icing, a common failure point for sensors in cold environments.
- Flexible Output Options: It offers an optional precipitation intensity frequency output port, providing more detailed data than just a simple present/absent signal. An optional relay control module further enables direct activation of intelligent equipment based on precipitation detection.
- Low Power Consumption: With a power consumption of less than 0.5W, the sensor is suitable for remote installations powered by batteries or solar panels.
4.Technical Specifications
| Parameter |
Value |
| Detection Area |
Total effective area 2000 mm²; most sensitive zone: center band (10x50), area 500 mm² |
| Precipitation Off-On Response |
<1 s; large-particle precipitation response: 0.1 s |
| Precipitation On-Off Delay |
<15 s (accurate judgment requires raindrop count statistics over time) |
| Precipitation Sensitivity |
0.001 – 1000 mm/h |
| Tilt Angle |
30° |
| Protection Class |
IP65 |
| Power Supply |
DC 9 – 16 V, typical DC 12 V |
| Power Consumption |
<0.5 W |
| Atmospheric Pressure |
≥850 hPa |
| Dimensions |
136 x 80 x 108 mm (sensor); mounting foot height 50 mm |
| Weight |
<2 kg |
| Operating Temperature |
-25 – 80 °C |
| Air Humidity |
100 % |
| Salt Fog Resistance |
Suitable for coastal areas |
5.Applications
- Automated Meteorological Stations: It serves as a key component for monitoring weather conditions, providing essential data for weather forecasting and climate research.
- Road and Highway Weather Information Systems (RWIS): The sensor can be deployed along roadways to detect the onset of rain or snow, triggering alerts for road maintenance crews and contributing to safer driving conditions.
- Airport Operations: It helps monitor runway and taxiway conditions, providing critical data for winter maintenance planning and ensuring safe aircraft operations.
- Smart Irrigation Systems: By detecting rain, the sensor can automatically pause irrigation systems, conserving water and preventing overwatering.
- Industrial and Commercial Applications: It can be used to protect sensitive outdoor equipment by triggering protective measures (e.g., closing retractable roofs, covering goods) when precipitation is detected.
- Traffic Signal Control: The sensor can be integrated with traffic management systems to adjust signal timing or activate warning signs during adverse weather conditions.
