A new version of the Casella CEL Tipping Bucket Rain Gauge has been specifically adapted to meet the requirements of the UK Environment Agency’s specification, is available to customers.
This gauge has been specifically adapted to meet the framework directive of the UK Enviroment Agency for operating tipping bucket rain gauges.
Connection to logging equipment is via IP67 rated quick-release connectors under the base plate.
Extended mounting screws are fitted to raise the base plate above ground level.
The rain gauge calibration complies with Method 1 of BS 7483.

The Casella CEL Rainfall Logging System utilises the Tipping Bucket Rain Gauge with an in-built datalogger. The system enables rainfall data to be recorded and stored in the memory as real-time information.
Once measured, the rain water is automatically discharged from the rain gauge and therefore does not overflow when left for long periods of time. The rainfall data is transferred from the logger using a PC or laptop. PC software and a communication lead are provided with each system, enabling the user to produce daily and monthly tables and histograms.
An internal alkaline battery, having a typical life expectancy of up to 3 years, is used to power the system. A lithium battery provides protection of the logged data in the event of main battery failure or replacement. The datalogger is only active during actual rainfall and remains dormant during dry spells to conserve both memory and main battery reserves. During rainfall periods, data will be recorded with a time resolution of one minute and presented as total rainfall occurring within the given minute.
For example if the logger of a 0.2mm model logs 3 tips in 1 minute, it will show a result of 0.6mm rainfall for that minute. The memory has the capacity for almost 100 hours of continuous rainfall.

Applicable Standards
BS 7843 Guide to acquisition and management of MET precipitation data recorders parts 1 and 2
WMO commission for instruments and methods of observation No. 727

Integral application software
Casella CEL Integral application software provides users of Casella CEL rainfall logging systems with a powerful and versatile Windows program for the accumulation, processing and presentation of rainfall data. It can also import data from Casella’s current RLS application (which it replaces).
Once data has been downloaded from a logger it provides a large number of ways to view / interrogate the data.
The Rainfall Logging System application allows you to view rainfall data in three different tabular formats, and three different graphical formats. All of which can be printed or copied into a word processor package to produce reports. It can also calculate rainfall totals and the maximum hourly rainfall rate.

Main data views:

• Summary
• Minute table
• 15 minute table
• Hour table
• Day table
• Daily hour histogram
• Month day histogram
• Month hourly rain graph

The Casella CEL Tipping Bucket Rain Gauge is a reliable and extremely robust transducer, designed as a stand-alone sensor for operation within an existing logging system, such as the Casella CEL Automatic Weather Station. The body and funnel are made from aluminium alloy with an accurately machined septum ring at the top giving an aperture of 400cm2. The tipping bucket mechanism is mounted inside the body on a cast aluminium-alloy base, incorporating a built-in spirit level to ease correct positioning.

The rain gauge comprises a divided bucket assembly, which is pivoted at the centre. Rain collects in one side of the bucket, which then tips when a predetermined volume of water has been collected. The tipping action discharges the collected water and repositions the opposite side of the bucket under the discharge nozzle ready for filling. The bucket tips are monitored by means of a sealed reed switch, capable of indefinite operation, thus ensuring that this instrument has a long working life.

Applicable Standards
BS 7843 Guide to acquisition and management of MET precipitation data recorders part 1 and 2

Also available for moderate and heavy rainfall.

SmartReader 9 is a versatile data logger designed for easy counting and recording of switch contact closures and voltage pulses. It has two input channels each with three selectable frequency ranges

Three types of measuring jars are available; Flat, Tapered and Camden. Tapered and Camden jars have additional measuring divisions in the bottom section. The Flat and Camden jars have flanged bases to enable them.

The Natural Siphon Rainfall Recorder provides a continuous graphical record of rainfall against time and can be supplied with either a daily or weekly clock.
* Supplied with 2 pens. All charts must be ordered separately

Applicable Standards
BS 7843
Guide to acquisition and management of MET precipitation data recorders parts 1 and 2.
WMO Commission for Instruments and Methods of Observation No. 727

Rain gauge with inner can and collection bottle (measuring jar not included).
The Snowdon gauge is a popular, general purpose rain gauge. The collection aperture has an accurately turned bevelled rim to minimise splashing.
WMO Commission for Instruments and Methods of Observation No. 727

Rain gauge with inner can and collection bottle (measuring jar not included).

This high capacity gauge is suitable for use at remote sites where daily access is impractical. It is manufactured with consideration to BS 7843 part 2.1. Bradford-type gauges are also available on request.

Rain gauge with inner can and collection bottle (measuring jar not included).
This rain gauge is similar to the Snowdon gauge but has a splayed base for greater stability.

Applicable Standards
BS 7843
Guide to acquisition and management of MET precipitation data recorders parts 1 and 2

The Tilting Siphon Rainfall Recorder provides a continuous graphical record of rainfall against time.

(Charts must be ordered separately)

Designed for schools and amateur meteorologists, where the accuracy of more costly professional versions is not required.

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