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Enabling better global research outcomes in soil, plant & environmental monitoring.

Low Resolution Rain Gauge

Best for measuring irrigation events, Decagon's ECRN-50 is both self-emptying and frost proof. Plug-and-log capabilities with the Em50 series data loggers. One tip per 1 mm of precipitation/irrigation.

Low-Resolution Rain Gauge

The best rain gauge for measuring irrigation events.

Configure as Volume Gauge

The ECRN-50 can be reconfigured to measure the output of irrigation systems in terms of either gallons or liters per hour.

Single Spoon Mechanism

The single-spoon mechanism tips at 1 mm of precipitation/ irrigation; accuracy is ±2%.


Made of durable plastic that is UV, water, and frost-resistant.

Resolution 1 mm
Sensor Type Single spoon tipping bucket
Output Pulse
Case Material ABS
Operating Environment 0°C to 60°C
Cable Length 5 m
Cable Connector Types 3.5 mm “stereo” plug
Sensor Dimensions 5 cm x 10 cm
Data Logger Compatibility (not exclusive) Decagon Em50 series, Decagon Em5b, Procheck, Campbell Scientific
Warranty One year, parts and labor
*The older model ECRN Rain Gauge used with Em5 loggers is not compatible with the Em50.  Please contact Decagon for an ECRN upgrade kit that will allow you to use it with the Em50.


Rain Gauge ECRN-100 ECRN-50
Measures Precipitation Precipitation
Resolution 0.2 mm 1 mm
Sensor Type Double-spoon tipping bucket Single spoon tipping bucket
Data Logger Compatibility Em50 series, ProCheck Em50 series, Em5b, ProCheck
Best if… You want precise measurements of rainfall You want estimates of irrigation events
But not if… You are interested in snowfall You need high resolution rain event measurements