Serving the Industry since 1967
N-CON Systems Company, Inc.
Atmospheric Deposition Sampler Models
  • Product Summary
  • How It Works
  • Technical Specifications
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NADP approved for NTN Sites

Closed cover sealing sample collection container

Interior with Glass sample train

  • Compact to minimize splash area
  • Prompt opening and closing of sample container
  • Does not “hunt” under marginal precipitation conditions
  • Reliable, heavy duty cover drive motor
  • Easy mounting
  • Operates on 110VAC/220VAC
  • Plug & Play replacement parts
  • Responsive to light snow, drizzle or heavy fog
  • Variety of sample trains available


An infrared, optical precipitation sensor detects the onset of precipitation and uncovers the sample container within sensing 5 drops. Within two minutes after precipitation stops, the cover returns to seal the collector funnel and minimize exposure to dry deposition. Sensitivity may be changed in the field. Sensor also detects drizzle, heavy fog or light snow, which may carry significant amounts of deposition.

Thermostatically controlled heating and ventilating fan in the housing optimizes sample preservation. Heating of collection funnel minimizes snow build-up. A
thermoelectric refrigeration system is available for extremely high ambient installations. Heavy duty cover drive is rated for 20 years of typical service. All parts are easy to replace without special tools.

The MDN is easily mounted on a 2” NPS pipe by a socket secured with 2 set screws. The control system provides an auxiliary contact that closes during precipitation.. This contact can operate a user furnished data logger or event recorder pen in a Belfort Universal Rain gage. System will also interface
with a variety of electronic weighing rain gages in NADP installations.


DIMENSIONS: 34” (86 cm) Wide (less sensor) 19” (46 cm) Deep (less splash shield) 27” (68 cm) High

WEIGHT: Net: 51 Pounds ( 24 Kg) Shipping: 68 Pounds ( 32 Kg.)

MATERIALS OF CONSTRUCTION: Housing: Aluminum Alloy, seam welded White polyester powder coat Sample collector cover: Aluminum alloy, seam welded White polyester powder coat

PRECIPITATION SENSOR: Type: Infra-red transmitter and receiver Opening: Within 5 drops of onset of precipitation Closing: Within 2 minutes of end of precipitation (May be field adjust ed to suit site conditions)

POWER REQUIREMENTS: 115VAC or 220VAC (must be specified) Max: with all heaters 10Amps @ 115 VAC 5Amps @ 220 VAC Internally fused with lightning protector GFI (ground fault interrupter) MUST BE USED.

OUTPUT FOR DATA LOGGER or EVENT RECORDER: 1 Unpowered, normally open contact is closed for the duration of the sampling event. 1 Unpowered, normally open contact is closed to indicate system power is on.

MOUNTING: Direct mounting on 2” NPS pipe (2.375 Dia. 68mm Dia.) With mounting collar and 2 set screws

SAMPLE TRAINS: (19-128) Glass funnel, glass anti-ev aporation capillary, glass sample bottle (2 liter) (19-130) Polyethylene funnel with connector a nd 1.5 liter HDPE sample container

17-125 Thermoelectric refrigeration system to replace Exhaust fan assembly.
17-505 Thermometer, C° Max, Min & Current
17-510 Thermometer, F° Max, Min & Current