The high-quality optical rain gauge sensor offers advanced, non-contact rainfall measurement using a high-precision infrared optical sensor. It utilizes a reliable filtering algorithm to eliminate interference from external light and fog. This precision rain gauge features a stable signal, high accuracy, compact size, lightweight design, and long service life.
Rainfall Measurement & Smart Interference Rejection
- Adopts infrared light as the measurement medium, ensuring high sensitivity and consistent readings regardless of environmental conditions.
- Employs advanced filtering algorithms to automatically eliminate interference from stray light, fog, and water droplets on the sensing surface.
- Offers maintenance-free operation with no moving parts, effectively resisting leaf blockage and dust accumulation without compromising accuracy.
- Supports rainfall data reset upon power cycle or manual clear command via Modbus-RTU protocol for flexible data management.
Output Options for Different System Requirements
- RS485 model supports Modbus-RTU protocol with configurable baud rates (2400/4800/9600) and device addresses (1–254) for multi-sensor networking.
- The pulse output model provides a dry-contact 5V signal with a withstand voltage up to 30VDC and a current up to 1A, compatible with most irrigation and PLC controllers.
- RS485 version enables long-distance data transmission with stable signal integrity over extended cable runs for remote monitoring applications.
- Both models feature a compact 6cm diameter design and low power consumption under 0.24W, fitting seamlessly into existing systems without modification.
Applications
SISCO rain gauge sensors are widely used at hydropower stations, reservoirs, agricultural and forestry sites, meteorological and hydrological stations, and other facilities to accurately measure rainfall for weather observation, irrigation planning, and water resource management.
Reservoir
Weather Station
Hydrological Station
Agriculture and Forestry
Â
| Model | SISCO-RS-3001 |
| Rain Sensing Diameter | 6cm |
| Power Supply Voltage | 10-30V DC |
| Power Consumption | ＜0.24W(12V DC, current＜20mA) |
| Resolution | Standard 0.1mm |
| Typical Accuracy | ±5% |
| Maximum Instantaneous Rainfall | 24mm/min |
| Output Mode | RS485 type/pulse type |
| Working Temperature | -40-60℃ |
| Working Humidity | 0-99%RH(no condensation) |
| Working Pressure Range | Standard atmospheric pressure±10% |
| Withstand Voltage (pulse type) | ≤30V DC |
| Withstand Current (pulse type) | ≤1A |
Dimensions (unit: mm)
Wiring Method
Q1: How does the non-contact optical rain sensor with pulse/RS485 output measure rainfall?
A1: This non-contact optical rain sensor uses infrared light as the measurement medium. Built-in high-precision optical probes detect changes in light transmission caused by raindrops, converting them into rainfall data. Unlike mechanical rain gauges, it has no moving parts, ensuring maintenance-free and reliable operation.
Q2: What is the difference between the RS485 and pulse output versions of the optical rain gauge?
A2: The RS485 model supports Modbus-RTU protocol with configurable baud rates and device addresses for multi-sensor networking over long distances. The pulse model provides dry-contact 5V signal output for direct connection to irrigation controllers and PLCs. Choose based on your system's interface requirements.
Q3: Does the electronic rain sensor require regular maintenance or cleaning?
A3: No. This electronic rain sensor features a maintenance-free design with no moving parts. It resists leaf blockage and dust accumulation without affecting accuracy. The built-in filtering algorithm automatically eliminates interference from stray light and fog, though occasional surface wiping is recommended for optimal long-term performance.
Tips: How does this optical rain sensor stay accurate outdoors?
- Advanced filtering algorithms in the non-contact optical rain sensor automatically eliminate interference from stray light, fog, and water droplets, ensuring stable and reliable readings even in sudden rainstorms or strong sunlight.
- The maintenance-free design of this optical rain gauge with no moving parts effectively resists leaf blockage and dust accumulation, eliminating the frequent cleaning that mechanical rain gauges typically require.
- Built-in self-calibration sustains the measurement accuracy of this electronic rain sensor without manual intervention, automatically compensating for component drift and environmental changes over time.
- The sealed housing of this optical rain sensor with pulse/RS485 output operates reliably from -40°C to 60°C, withstanding freezing winters, scorching summers, and heavy moisture without performance degradation.Â
Thank you for buying industrial test and measurement equipment on SISCO.com, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.
What is covered?
SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.
What is not covered?
- Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
- Expendable parts.
- Routine cleaning or normal cosmetic and mechanical wear.
- Damage from misuse, abuse or neglect.
- Damage from use of parts other than SISCO approved.
- Damage from use outside the product’s usage or storage parameters.
- Damage from use of parts not sold by SISCO.
- Damage from modification or incorporation into other products.
- Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
- Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
Shop on sisco.com for all of your industrial test and measurement equipment & accessories including portable detectors, meters, testers, scales, etc.
