tipping bucket rain gauge 0.2 mm per tip standard

Historically, 0.2 mm per tip emerged as a compromise between sensitivity and mechanical durability. Finer resolutions like 0.1 mm exist but require lighter buckets and more precise pivots, which can be more prone to sticking or calibration drift. Coarser resolutions (0.5 mm or 1 mm) miss light rainfall events. For hydrological and meteorological monitoring, 0.2 mm provides enough granularity for hourly or daily totals without generating excessive pulse counts that strain logger memory or battery life.

The gauge should be mounted on a stable, vibration‑free platform, away from overhanging obstructions. Use the integrated bubble level to fine‑tune the three‑point leveling screws – even a small tilt changes the effective collecting area and leads to biased readings. For windy sites, a wind shield or ground‑level installation within a pit can reduce undercatch. Kingmach gauges typically include mounting holes for bolting to a concrete base or pole bracket.

Most Kingmach tipping bucket rain gauges use a magnetic reed switch that provides a momentary dry contact closure with each tip. This creates a brief pulse (typically a few milliseconds). You connect the two‑wire cable to a data logger channel configured for pulse counting or a digital input. The logger then sums the pulses and multiplies by 0.2 mm to compute rainfall. Pay attention to debounce filtering if your logger is fast – otherwise mechanical bounce can cause double counting.

Yes. Kingmach offers modifications such as longer cable runs, alternative connector types, mounting brackets for towers or marine applications, and different material choices for corrosive environments. If your project needs a higher or lower resolution, or a particular funnel diameter to match existing standards, the engineering team can usually accommodate those requests.

Regular maintenance is simple but critical. Check the funnel and debris screen for leaves or bird droppings every few months. Verify the bucket mechanism tips freely and clean any biofilm or insect residue from the buckets with a soft brush and mild detergent. Annually recheck the level and do a spot calibration by pouring a known volume of water slowly through the gauge – the number of tips should match the calculated amount within the gauge’s accuracy spec. In freezing climates, heating elements can prevent ice buildup, though that’s usually an optional add‑on.