Models TB3H-LP TB3 Tipping Bucket Rain Gauges Heater Kits

The TB3H-LP is a low-power variation of the TB3H thermostatically controlled heating element that raises the temperature of the interior of the rain gauge and catch to avoid the freezing of the gauge in cold climates with subsequent loss of precipitation records. When the ambient temperature drops below a pre-set value (+ 4oC), the snow sensor in the funnel is activated. The heating elements remains ”OFF” until snow is detected in the catch area (funnel).

The heating elements are turned on and off to keep the funnel temperature at the pre-set Set point temperature. (+ 10oC ) This will continue for a minimum pre-set time (18 mins) after there is no snow remaining in the catch. The heater will then be switched off and the unit will return to the “WAIT” mode until triggered by another snow event. The system will be de-activated when temperature drops below (-20oC) or above (+5oC) nominal.

Main Features

  • Power Requirement AC/DC
  • Low Power Consumption
  • Only Operating When Snow Is Detected
  • Fully Automated Operation
  • Thermostatically Controlled Heating Element
  • SDI-12 Interface
  • Ambient temperature range -40oC to +70oC (-40oF to +158oF)
  • Heater operating parameters between -20oC to +5oC (-4oF to 41oF)
  • Average power generated 35 watts (150 watts during initial minute warm up)
  • Voltage requirements:
    • Main Power: 10VDC to 30VDC  or 12VAC to 28VAC
    • SDI-12 Power: 9.6VDC to 16VDC (SDI-12 standard)
    • SDI-12 Interface: optically isolated ,1200 baud, 7 bits, even parity
  • Power generated and current requirements:
    • 12 VDC
    • 45 watts average (70 watts when heater is on)
    • 3.7 amps average (approx. 65% duty cycle) (5.8 amps when the heater is on)

Please note tipping bucket rain gauge is ordered separately.