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Vibrating Wire Strain Gauges for Bridge, Tunnel & Dam Monitoring: Complete Selection Guide
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0.1 mm / 0.2 mm Standard Tipping Bucket Rain Gauges
tipping bucket rain gauge resolution 0.1 mm 0.2 mm standard
Choosing between a 0.1 mm and a 0.2 mm tipping bucket rain gauge often comes down to how much detail you need versus the data you want to process. Finer resolution catches light drizzles and short showers more faithfully; coarser buckets reduce pulse counts without masking meaningful precipitation trends. Kingmach supplies both as standard mechanical gauges that work with most dataloggers and monitoring systems. No complex calibration, no onboard electronics to replace—just a balanced bucket and a reed-switch output that field crews can splice into existing setups. Municipal flood monitoring networks, agricultural weather stations, and research basins use them year-round, often in batches of ten to fifty units across a district. The choice between resolutions usually gets made once per project, and we keep both options in regular production so you can mix quantities in a single order.
Technical Detail
Configured around process stability, mold life, and long-term uptime.
The bucket mechanism in these gauges works on a straightforward principle: a twin-sided bucket tips when it collects a set amount of water, closing a magnetic switch and sending a pulse for each tip. With the 0.1 mm version, that threshold equals 1 gram of water per tip (on a standard 200 cm² orifice); the 0.2 mm version tips at 2 grams. This makes field verification easy—any technician can pour a known volume of water and count tips. Kingmach builds the housing and internal parts from anodized aluminum and stainless steel, with a UV-stabilized funnel and leaf guard. The leveling screws and built-in bubble level speed up installation on masts or concrete plinths. Output is a simple normally-open reed switch, compatible with pulse-counting channels on most loggers. For users who need a heated version in regions with freezing precipitation, we can add thermostatic control. Signal cables typically ship in 2 m or 5 m lengths, but custom lengths are easy to arrange. Because these are passive gauges, they draw no power and can sit at remote sites for months between visits. Routine maintenance comes down to clearing debris from the intake and checking the bucket pivot for smooth movement.
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FAQ
Common technical questions
What’s the practical difference between 0.1 mm and 0.2 mm resolution in terms of data volume?
A 0.2 mm gauge will generate about half as many tips as a 0.1 mm gauge for the same rainfall. If your logger has memory limits or you’re transmitting over a slow radio network, that reduction matters. However, light rainfall events (below 0.2 mm) will not be recorded by the coarser gauge, which can affect stormwater calculations in urban settings.
Can I switch the resolution on an existing gauge?
The resolution is fixed by the bucket’s geometry and counterweight. You can’t convert a 0.1 mm unit to 0.2 mm in the field. We ship each gauge calibrated to one resolution. If you need both, order separate units—they look identical externally and use the same mount.
How often do these gauges need recalibration?
Under normal conditions, the bucket pivot and reed switch stay stable for years. We recommend a quick field check every 6–12 months using a graduated cylinder. If the tip count drifts more than 5%, clean the mechanism and check for obstructions. Abrasive dust or freezing-thawing cycles may shorten that interval.
Are the Kingmach gauges compatible with Campbell Scientific or Onset loggers?
Yes, the reed switch outputs a dry-contact closure, which works directly with pulse-input modules from Campbell, Onset, and most third-party dataloggers. You just need to provide a pull-up resistor at the logger end. We can include wiring diagrams for common logger models.
What’s the lead time for a mixed order of 0.1 mm and 0.2 mm gauges?
Both resolutions are standard items. Typical lead time is around 2–3 weeks for quantities under 50 units, depending on stock. Larger orders or custom cable lengths may take a bit longer. We can ship partial batches if you need a few units urgently.
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