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Overview
The RIM-7499-STD series is a commercial grade rain gauge that uses the same tipping bucket and siphon assembly as the RIM7499 series but with a spun aluminium base and a spun copper collecting funnel and rim. The RIM-7499-STD is accurate to within /- 3% at intensities up to 380mm per hour and /- 5% at rates up to 500mm per hour. Can be ground mounted or mounted on galvanised pipe using Campbell Scientific’s CM240 rain gauge mount. Other bucket sizes are available on request.
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Benefits and Features
- Rugged and corrosion resistant construction
- Low Friction, non-seizing bucket bearings
- Gold plated buckets for minimal retention
- Dual reed switch output
- Mercury wetted switch option
- Stable calibration
- Built-in bubble level
- Optional bubble level
- Optional self powered internal counter
- Optional heater for operation below -20°C
Detailed Description
The RIM-7499-STD series rain gauge utilises the bucket and siphon assembly of the high performance RIM-7499-STD series to ensure accuracy and a long service life but at a lower cost. All materials used are corrosion resistant and designed for almost all environmental conditions. The RIM-7499-STD is accurate to within 3% up to 380mm/hr and 5% up to 500mm/hr. Rain falling on the 203mm (8”) diameter collecting funnel is directed through a siphon control unit and discharges as a steady stream into a precision two compartment bucket mounted in unstable equilibrium. As each compartment fills the bucket tilts alternately about its axis. Each tilt produces a momentary contact closure as a result of a magnet sweeping past a reed switch assembly. Each contact closure corresponds to 0.2mm, 0.25mm or 0.5mm of rainfall according to bucket capacity. An individual calibration certificate is supplied with every RIM8000 rain gauge.
Specifications
| Receiving Collector: | 203 ± 0.2mm (8”) diameter |
| Accuracy: | ±3.0% to 380mm/hr (siphon must be fitted) |
| ±5.0% to 500mm/hr (siphon must be fitted) | |
| Bucket Capacities: | 0.2mm (model RIM8020) |
| 0.25mm (model RIM8025) | |
| 0.5mm (model RIM8050) | |
| Switch and Rating: | Dual reed switch assembly |
| 50V ac/dc at 0.5A non-inductive | |
| 50V ac/dc at 1A for mercury wetted switching option | |
| Contact Closure Timing: | 100 milliseconds nominal, up to 50 milliseconds variation;0.75 milliseconds bounce time max |
| Termination: | Screw termination (2.5mm2) and 4.8mm male spade terminations on Switch Holder |
| Overall Dimensions: | 300mm height; 230mm body diameter; 275mm mounting flange diameter |
| Mounting: | Three 10mm holes at 120° pitch on mounting flange at 256 mm diameter between centres |
| Materials: | Collector Assembly Copper, Jacket Stainless Steel, Base Painted Marine Grade Aluminium, Bucket Gold Plated Brass, Bridge Marine Grade Aluminium, Reed Switch Holder Delrin, Fasteners Stainless Steel |
| Weights: | 2.8kg net, 4.5kg shipping weight, Standard shipping carton - 330mm x 330mm x 430mm |
| Heater Option | 12V or 24V ac/dc (48W max) with electronic control factory set to 5°C (P/N RIM80HOPT) |
| Temperature Operating: | 0° to +60°C (without heating); below -20° to +60°C (with heating); storage -65°C to +75°C |
| Humidity Operating: | 0% to 100%, storage 5% to 100%. |
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