CG-04-A2 All-Metal Rainfall Sensor

Product Overview

The all-metal rainfall sensor is a newly developed metal rainfall sensor that detects rainfall through the flipping of its internal dual tipping buckets and converts it into measurable physical signals. The main components of this sensor are made of metal, featuring a robust housing, high strength, and excellent protection. Additionally, it includes carefully designed details such as a double-layer filter screen, fully enclosed structure, and pre-reserved water guide pipe openings to ensure higher measurement accuracy of observed rainfall data and reduce the likelihood of pipe blockages or circuit failures.

Features

◆ Compact size, lightweight, extremely easy to carry and install;

◆ High measurement accuracy, small error, excellent stability, and strong anti-interference capability;

◆ Deep straight-tube structural design prevents rainwater splashing, ensuring collected rainwater is promptly channeled from the rain receiver into the inlet, allowing the tipping bucket to quickly detect rainfall changes;

◆ Double-layer protective mesh filtration prevents debris like leaves from blocking the inlet, avoiding disruptions to rainfall inflow due to clogging;

◆ The tipping bucket component support system is finely manufactured with low frictional torque, ensuring sensitive flipping, stable performance, and reliable operation;

◆ Primarily made of stainless steel, rust-resistant, sturdy, and with excellent appearance quality;

◆ The rain receiver is integrally stamped and drawn from stainless steel sheet, with high smoothness and minimal error caused by water retention;

◆ The base is equipped with a leveling bubble to assist in adjusting the device to a horizontal position using the base corners;

◆ Built-in balance wire allows partial adjustment of the tipping bucket while maintaining overall stability, ensuring the tipping bucket remains balanced;

◆ Fully enclosed structure prevents small animals from entering the instrument, avoiding damage to circuits or blockages of inlets and outlets;

◆ The base features pre-reserved water guide pipe openings for external connection to drain measured rainwater to user-specified locations during observation.

Working Principle

Rainwater collected by the rain receiver passes through the upper cylinder (funnel) and enters the measuring tipping bucket—a stainless steel component divided into two equal-volume chambers by a central partition. It operates as a mechanical bistable structure: while one chamber collects water, the other remains in a waiting state. When the collected rainwater volume reaches a preset value of 0.2 mm (or 0.5 mm), gravity causes the bucket to tip, switching the roles of the chambers. A magnet mounted on the side wall of the tipping bucket scans past a dry reed switch during each tip, causing the switch to open or close. Each tip of the bucket sends a switch signal (pulse signal).

Technical Parameters

Power Supply Voltage: 5V～24V DC (required for 485 type, not for pulse type)

Rain Receiver Diameter: φ200mm

Measurement Range: Rainfall intensity 0～4mm/min

Measurement Accuracy: ±2%

Resolution: 0.2mm, 0.5mm (optional)

Signal Output:

Pulse Type   

Signal: Single dry reed switch on/off

RS485 Type

Communication Protocol: Modbus-RTU (customizable)

Power Consumption: <15mA

Protection Rating: IP66

Applications

The all-metal rainfall sensor is a hydrological and meteorological instrument used to measure natural rainfall and convert it into digital information output in the form of switch signals to meet the needs of information transmission, processing, recording, and display. It can be used by meteorological stations, hydrological stations, agricultural and forestry departments, field monitoring stations, and other relevant sectors, in conjunction with our company’s rainfall recorders to measure precipitation, rainfall intensity, and rainfall duration. It also provides原始 data for flood control, water supply调度, and reservoir water management at power stations.