FirstRate FST100-2008 Tipping Bucket Rain Gauge Sensor, RS485 Modbus, 0.2mm Resolution, ≤4 mm/min~8mm/min Range

Name: FirstRate FST100-2008 Tipping Bucket Rain Gauge Sensor, RS485 Modbus, 0.2mm Resolution, ≤4 mm/min~8mm/min Range
Brand: FirstRate
SKU: SENS-0227
Price: 26779.00 INR
Availability: OutOfStock

₹26,779.00 (Inclusive of all taxes)

Out of Stock

The FirstRate FST100-2008 is a high-precision tipping bucket rain gauge sensor with RS485 Modbus-RTU output, designed for professional meteorological and hydrological data acquisition systems. It provides reliable 0.2mm resolution rainfall measurement compatible with industrial PLCs and SCADA networks.

Features

High-precision tipping bucket mechanism with 0.2mm per tip resolution.
Standard RS485 interface with Modbus-RTU protocol for industrial integration.
Stainless steel construction (φ200mm rain opening) for long-term outdoor durability.
Measures rainfall intensity from ≤4 mm/min up to a maximum of 8 mm/min.
Includes mounting hardware (leg lock nuts, base support nuts, screw set) for secure installation.

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Description

The FST100-2008 tipping bucket rain gauge operates on a precise mechanical principle where a calibrated bucket tips for every 0.2mm of collected precipitation, generating a corresponding pulse. This mechanical signal is converted into a digital output via its integrated electronics, supporting both direct pulse counting and standardized RS485 Modbus-RTU communication at 9600 baud.

Constructed with a stainless steel shell and a Sharp Microelectronics-edged, high-smoothness rain-bearing mouth, the sensor minimizes water adhesion errors and is protected against debris clogging by an integrated funnel mesh. Its robust design ensures stable performance across an operating temperature range of -10°C to 50°C, making it suitable for permanent, unattended field deployment in harsh environmental conditions.

Key Features

Precision Measurement: Delivers 0.2mm resolution with a tested range of ≤4 mm/min, capable of handling peak intensities up to 8 mm/min.
Industrial Communication: Integrated RS485 transceiver with Modbus-RTU protocol for seamless connection to data loggers, PLCs, and telemetry systems.
Durable Construction: Stainless steel housing and rain-bearing components provide corrosion resistance and long-term stability.
Debris Protection: Funnel mesh design prevents leaves and other obstructions from blocking the rainfall inlet.
Sensitive & Reliable Mechanism: Precision-balanced tipping bucket assembly ensures sensitive flips and consistent, reliable operation.
Complete Mounting Kit: Includes all necessary hardware (nuts, screws, supports) for straightforward and secure pole or platform mounting.

Applications

Automated meteorological stations and hydrological monitoring networks for precipitation data collection.
Environmental protection and flood warning systems for real-time rainfall intensity monitoring.
Agricultural and forestry research for measuring precipitation, irrigation management, and crop water stress analysis.
Urban drainage and flood control infrastructure performance monitoring.

Technical Specifications

Model	FST100-2008
Measurement Principle	Tipping Bucket
Rain Opening Size	φ200 mm
Resolution	0.2 mm per tip
Rain Intensity Range	≤4 mm/min (Max 8 mm/min)
Output Interface	RS485 (Modbus-RTU)
Baud Rate	9600
Output Signal (Pulse)	1 Pulse = 0.2 mm rainfall
Housing Material	Stainless Steel
Operating Temperature	-10°C to 50°C
Dimensions (Φ x H)	Φ216 mm x 460 mm
Shipping Weight	3.55 kg

Frequently Asked Questions

What communication protocol does the FST100-2008 rain gauge use?

The sensor uses a standard RS485 serial interface with the Modbus-RTU protocol. It communicates at a fixed baud rate of 9600, making it directly compatible with most industrial PLCs, SCADA systems, and data loggers that support Modbus communication for easy integration into monitoring networks.

How is the rainfall measurement calculated from the sensor's output?

The sensor provides two output methods. Primarily, each tip of its internal bucket corresponds to exactly 0.2mm of rainfall, which can be counted as a pulse. Alternatively, the integrated RS485 output provides a digital value corresponding to a cumulative rainfall range of 0-2000mm, following the Modbus register map detailed in the product datasheet.

What is the operating environment and mounting requirement for this sensor?

The sensor is designed for continuous outdoor use, with an operating temperature range of -10°C to 50°C. It must be mounted on a stable, level platform or pole using the included hardware (nuts and supports) to ensure accurate measurement. The φ200mm rain opening should be unobstructed and clear of overhead objects like trees or buildings.