Tipping bucket rain gauges for rainfall monitoring, RTD serie

Accurate rainfall data starts with a stable mechanical design and clean water flow. The RTD series uses a calibrated tipping bucket mechanism: rain collected by the aluminum funnel fills the bucket, triggers a tip at the preset volume, then generates a pulse for a data logger or counter.

The series is designed according to WMO-No. 8 recommendations and built from corrosion-resistant materials for long outdoor service. Choose 200 cm² or 400 cm² collecting area, 0.1, 0.2 or 0.5 mm/tip resolution and the output that fits your station architecture, from voltage-free NC contact to RS485, SDI-12, MOSFET Open Drain, 4…20 mA or 0…10 V.

Heated versions support operation down to -25 °C and activate around +4 °C to help prevent snow deposits and ice formation. A removable filter, non-stick collector cone, integrated bubble level and mast mounting on Ø40…60 mm supports faster installation and simpler maintenance in meteorological and environmental monitoring networks.

WMO-based design
Designed according to WMO-No. 8 for standardized rainfall measurement

Cold-weather option
Heated versions operate from -25…+70 °C and activate around +4 °C

Flexible integration
Contact, RS485, SDI-12, Open Drain, 4…20 mA or 0…10 V outputs by model

Low maintenance
Removable filter and non-stick collector cone help prevent clogging

Features

• Tipping bucket mechanism
  The collector cone channels rain into a calibrated bucket, which tips at the preset volume and generates an electrical pulse.
• Collector options
  Models are available with 200 cm² or 400 cm² collecting area and nominal resolution of 0.1, 0.2 or 0.5 mm/tip.
• Digital communication
  Digital versions provide RS485, with SDI-12 and MOSFET Open Drain available on RTD…Fx models.
• Analog output
  RTD…Dx provides 4…20 mA, while RTD…Vx provides 0…10 V. Alternative 0…20 mA or 2…10 V settings are configurable.
• Measurement correction
  Digital and analog models store correction curves in the rain gauge and apply automatic correction according to rainfall rate.
• Heating control
  Heated versions use 24 Vdc ± 10% supply. Digital and analog models use PID control; contact-output models use ON/OFF control.
• Diagnostic sensors
  Built-in sensors monitor pressure, temperature, relative humidity and tilt for environmental and instrument condition checks.
• Installation hardware
  The rain gauge mounts on a Ø40…60 mm mast and includes a bubble level for aligning the tipping mechanism.