TE525MM-L Metric Rain Gauge with 9.6 in. Orifice

Name: TE525MM-L - Metric Rain Gauge with 9.6 in. Orifice
Brand: Campbell Scientific

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Precipitation Sensors - Rain gauge / TE525MM-L

TE525MM-L Metric Rain Gauge with 9.6 in. Orifice

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Overview

The TE525MM, manufactured by Texas Electronics, is a tipping-bucket rain gauge that monitors rainfall in metric rather than US units. It measures in 0.1 mm increments and has a 24.5 cm funnel. This tipping bucket is compatible with all Campbell Scientific dataloggers, and is widely used in environmental monitoring applications.

Accuracy is ±1 percent at rates up to 1 in./hr
Compatible with most Campbell Scientific data loggers
High precision—tips at 0.1-mm increments
Compatible with the CWS900-series interfaces, allowing it to be used in a wireless sensor network
Includes a 24.5-cm funnel, which is the largest diameter funnel of the TE525-series raingages

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Technical Description

The TE525MM funnels precipitation into a bucket mechanism that tips when filled to its calibrated level. A magnet attached to the tipping mechanism actuates a switch as the bucket tips. The momentary switch closure is counted by the pulse-counting circuitry of our data loggers.

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Compatibility

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Dataloggers

Product	Compatible	Note
CR1000 (retired)
CR1000X (retired)
CR3000 (retired)
CR6
CR800 (retired)
CR800 (retired)
CR850 (retired)
CR850 (retired)
CR850 (retired)
CR850 (retired)

Additional Compatibility Information

Mounting

The TE525MM rain gage mounts to a CM300-series Mounting Pole or a user-supplied 1.5” IPS pole. Several pedestal options are available to secure a CM300-series pole to the ground (see Ordering Information). Accurate measurements require the gage to be level.

Snowfall Adapter

The TE525MM cannot be directly used with our CS705 rainfall adapter. However, the CS705 is compatible with the TE525WS, and the TE525MM can be converted to a TE525WS by returning it to Campbell Scientific (requires an RMA).

Wind Screen

Campbell Scientific offers the 260-953 Wind Screen to help minimize the affect of wind on the rain measurements. This wind screen consists of 32 leaves that hang freely and swing as the wind moves past them.

Specifications

Sensor Type	Tipping bucket with magnetic reed switch
Material	Anodized aluminum
Operating Temperature Range	0° to 50°C
Resolution	1 tip
Volume per Tip	4.73 ml/tip (0.16 fl. oz/tip)
Rainfall per Tip	0.1 mm (0.004 in.)
Measurement Uncertainty	1.0% up to 50 mm/h (2 in./h)
Cable Type	2-conductor shielded
Orifice Diameter	24.5 cm (9.66 in.)
Height	29.21 cm (11.5 in.)
Cable Weight	0.1 kg (0.2 lb) per 3.05 m (10 ft) length
Tipping Bucket Weight	1.1 kg (2.4 lb)

Related FAQs

Number of FAQs related to TE525MM-L: 14

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What do the accuracy specifications for the TE525MM-L mean?

At high-intensity rainfalls, it is likely that the rain will keep pouring into the tipper mechanism while it is tipping, so it will essentially splash out and not be registered. In those instances, there are less tips of the bucket—thus the -3% and -5% listed in the specifications.
What are the indicators that a tipping bucket rain gage is out of calibration?

Not enough tips or too many tips.
What is the rainfall per tip for the TE525MM-L?

The TE525MM-L has a 0.1 mm tip.
What can cause a tipping bucket rain gage to be out of calibration?

When a rain gage is out of calibration, it is usually because of the buildup of dirt and grime on the internal surfaces of the tipping bucket mechanism. Cleaning the internal surfaces usually brings the rain gage back into calibration. It is also possible that a rain gage is out of calibration because it is no longer level.

To minimize the possible occurrence of calibration errors, perform routine cleaning and maintenance of the rain gage at least once every three months. The environmental conditions at a particular site may require a facility to perform cleaning, leveling, and maintenance on a much more frequent schedule.
Can one TE525 model be converted to another by exchanging funnels?

A TE525-L can be converted to a TE525MM-L and vice versa because the inner tipping mechanisms are the same. To convert a TE525-L or TE525MM-L to a TE525WS-L, the rain gage must be sent in to Campbell Scientific to change the tipping mechanism. If an 8 inch funnel is used on a TE525-L or TE525MM-L without changing the tipping mechanism, the multipliers for the rain measurement will change. For information about these multipliers, see the TE525 Instruction Manual.
What are the most common errors with a tipping bucket rain gage?

The most common errors are either that the rain gage appears to have drifted out of calibration or that the tips are not being correctly recorded by the datalogger.
What is needed to connect a sensor that is compatible with wireless sensor interfaces to a CR800, CR1000, or CR3000 in a wireless network?

To incorporate a sensor that is compatible with wireless sensor interfaces into a wireless network, a CWS900-series wireless sensor interface is needed, as well as an A205 CWS-to-PC interface to configure it.
Are replacement funnels and screens available for the TE525MM-L and TE525WS-L?

Replacement screens and funnels can be ordered by calling an application engineer at Campbell Scientific.
What type of wind screen can be used for a tipping bucket rain gage?

The 260-953 Alter-type rain gage wind screen consists of 32 heavy metal leaves that hang freely and swing as the wind moves past them. The swinging leaves act as a wind damper and help minimize the effect of wind on the rain measurements without adding additional turbulence.
If a sensor automatically ships with a calibration sheet, what information is included on it?

The information included on a calibration sheet differs with each sensor. For some sensors, the sheet contains coefficients necessary to program a datalogger. For other sensors, the calibration sheet is a pass/fail report.

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