Type	WS-601 SS	WS-601 SH
Material	Steel stainless
Measuring range	0~240mm/hr, workable 480mm/hr
Accuracy	±≤2%(≤240mm/hr); ±≤3% (≤300mm/hr);	±≤ 2%(≤240mm/hr); ±≤3% (≤300mm/hr);
Resolution	0.2mm	0.5mm
Inner diameter	200mm/8inch ±0.3%
Acute angle of cutting edge	40~45°
Insect protection	Steel stainless Mesh with Edge
Output	Standard Pulse(Reed switch, 5pulse/mm); RS485 optional	Standard Pulse(Reed switch, 2pulse/mm); RS485 optional
Power supply	Pulse : MaxDC24V,100mA ; RS485: DC5V or DC 7-24V
Level control	Bulls eye level adhered
Base	Diecast stainless Steel
Mounting holes	Three mountings
Discharge control	Straight through flow mechanism
Working temperature	-20～80℃
Working humidity	0%~95%RH
Height	402.2mm
Weight	3.8Kg
Packing Size	313147cm

Key Features Comparison

Feature	Siphon Rain Gauge	Tipping Bucket Rain Gauge
Measurement Method	Float + siphon mechanism	Mechanical tipping + electronic counting
Data Output	Analog (paper chart)	Digital (pulse signals or wireless transmission)
Resolution	0.1 mm	0.1 mm or 0.2 mm
Rain Intensity Range	0.01–4 mm/min	≤4 mm/min (may lose accuracy in heavy rain)
Maintenance	Requires frequent chart replacement and siphon checks	Needs periodic cleaning and calibration
Solid Precipitation	Not suitable for snow/ice	Requires melting for snow measurement
Automation	Limited (manual data retrieval)	High (real-time remote monitoring)

Working Principles

Siphon Rain Gauge:

Rainwater enters through a collector funnel and flows into a float chamber.

A float rises with the water level, moving a pen that records rainfall on a rotating drum with a time-based chart.

When the water reaches a set level (e.g., 10 mm), a siphon tube drains the chamber automatically, resetting the float and pen.

Tipping Bucket Rain Gauge:

Rainwater fills one side of a small, balanced bucket.

Once a preset volume (e.g., 0.1 mm or 0.2 mm) is reached, the bucket tips, triggering an electronic pulse.

The count of tips is converted into rainfall depth, with data transmitted digitally.

Siphon Rain Gauge: Ideal for historical rainfall analysis in meteorological stations

Tipping Bucket Rain Gauge: Preferred for flood warning systems, floods are generally short periods of heavy rainfall, and 0.5 resolution tipping bucket rain gauges are recommended.

agriculture, and IoT-based weather networks.