Rain Gauge/Tip Bucket, 8", Siphon

The TR-525S is a remote rain gauge that measures liquid precipitation. It utilizes a unique siphoning mechanism that allows an extended range of accuracy. This system allows control of the “flow rate” of accumulated precipitation. This metering geometry assures higher levels in both accuracy and repeatability during periods of extremely heavy rainfall.


The TR-525S is a freestanding receptacle with an open top, called the collector, which allows rainfall to enter. The 4" deep collector is specially designed to prevent splash-out and overflow, two possible causes for loss of accuracy during extremely heavy rainfall events. Collected water is siphoned into a mechanical device, the tipping bucket style rain gauge. The tipping bucket then incrementally measures the rainfall accumulation and causes a momentary closure of a switch. As water is collected, the tipping bucket fills to the point that it tips over. This action empties the bucket in preparation for additional measurement. Water discharged by the tipping bucket passes out of the rain gauge with no need for emptying.

Availability: In stock

$589.00
Bulk Discounts Available
  • Buy 5 for $559.55 each and save 5%
  • Buy 15 for $544.83 each and save 7.5%
  • Buy 30 for $530.10 each and save 10%
  • Buy 100 for $515.38 each and save 12.5%

* Required Fields

Rain Gauge/Tip Bucket, 8", Siphon

Double click on above image to view full picture

Zoom Out
Zoom In

Additional Information

Resolution 0.01", 0.2 mm (optional)
Accuracy 1.0% up to 12"/hr
Siphon starting threshold <0.01" (<0.254 mm)
Collector Diameter 8.00" (203 mm) with knife-edge
Funnel Depth >7" (163 mm)
Splash out Protection 4" (50 mm)
Operating Temp 32 to 158°F (0 to 50°C)
Storage Temp -40 to 185°F (-40 to 70°C)
Humidity Limits 0 to 100%
Weight 6 lbs. (2.7 kg) 8 lbs. (3.6 kg) shipping
Height 15" (381 mm)
Cable 25', 24 Gauge 2 Conductor
Switch Momentary potted reed switch
Switch Rating 30 VDC @ 2A, 115 VAC @ 1A
Switch Closure Time 135 ms
Bounce Setting Time 0.75 ms
Pivot Hardened SS Jewel & Pivot
Bucket Black ABS injection molded
Level Integral Bubble Level
Warranty 3 years

Product File Documentation

You may also be interested in the following product(s)

CABLE Belden 2 Cndct. 24Ga.

CABLE Belden 2 Cndct. 24Ga.

Siphon Collector Assembly

Siphon Collector Assembly