370-380 Precipitation Gauges

370-380 Series all-metal precipitation gauges measure rain and/or snow in all environments using a tipping bucket mechanism. The economical tipping bucket design allows accurate, repeatable measurements, requiring no regular maintenance. Each model in the 370-380 Series is optimized to meet particular site and sampling requirements and exceeds EPA specifications.

Operation

When a precise amount of precipitation is collected in one side of the bucket, gravity tips the assembly and activates a reed switch. A momentary electrical contact closure is provided for each increment of rainfall. The sample is discharged through the base of the gauge. The optional heating elements are thermostatically controlled to melt snow and ice and avoid evaporative loss.

Features

  • Self-emptying, dual chambered tipping bucket
  • Jeweled bearings reduce wear and friction
  • Funnel screen system prevents debris from clogging gauge
  • Stainless steel, Teflon coated bucket
  • Corrosion resistant materials throughout
  • Bubble level & adjustable feet assure proper mounting
  • Optional heating elements for frozen conditions

Specifications

Precipitation Gauges
MODEL NUMBER FUNNEL DIAMETER STANDARD CALIBRATION OPTIONAL CALIBRATION
370 8 inch (20.3 cm) 0.01 in 0.2 or 0.25 mm
372 8 inch (20.3 cm) 0.5 mm N/A
380 12 inch (30.5 cm) 0.01 in 0.2 or 0.25 mm
382 12 inch (30.5 cm) 0.1 mm N/A
Precipitation & Snow Gauges
MODEL NUMBER FUNNEL DIAMETER STANDARD CALIBRATION OPTIONAL CALIBRATION POWER REQUIREMENT
375 8 inch (20.3 cm) 0.01 in 0.2 or 0.25 mm 115 VAC, 315 watts
376 8 inch (20.3 cm) 0.01 in 0.2 or 0.25 mm 220 VAC, 315 watts
377 8 inch (20.3 cm) 0.5 mm N/A 115 VAC, 315 watts
379 8 inch (20.3 cm) 0.5 mm N/A 220 VAC, 315 watts
385 12 inch (30.5 cm) 0.01 in 0.2 or 0.25 mm 115 VAC, 315 watts
386 12 inch (30.5 cm) 0.01 in 0.2 or 0.25 mm 220 VAC, 315 watts
387 12 inch (30.5 cm) 0.1 mm N/A 115 VAC, 315 watts
389 12 inch (30.5 cm) 0.1 mm N/A 220 VAC, 315 watts
Heaters: Funnel 240 watts, composite with built-in thermostat
Base 75 watts, composite with built-in thermostat
Thermostat Set Point: Funnel and base heater 40°F (4.4°C)
Common Specifications To All 370-380 Series Gauges
Operating Temperature: -58°F to 122°F (-50°C to +50°C)
Accuracy: ±0.5% at 0.5 ̋/hr, ±1 ̋- 3 ̋/hr
Switch: Reed switch rated at 10 mA, 28 VDC (maximum)
Physical Characteristics
Height: 8 inch   18in (46 cm)
12 inch   20.5 in (52 cm)
(not including cabling) 12 inch Precipitation   7.5 lbs (3.4 kg)
8 inch Precipitation/Snow   6.5 lbs (3 kg)
12 inch Precipitation/Snow   11.5 lbs (5.2 kg)
Finish: White gloss textured powder coat and clear anodized aluminum
Accessories
PN 820440 Wind Screen
The improved Alter-design screen is constructed of 32 free-swinging leaves, greatly improving the accuracy of the catchment by reducing local turbulence.
Cable (for Models 375-389)
PN 1566 Signal Cable Assembly; specify length in feet or meters
PN 2517 Power Cable Assembly; specify length in feet or meters
Ordering Information
Specify model number, calibration factor, cable length(s), and accessories.
Technical Drawing
 

Specifications are subject to change at any time