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Whole Air Conditional Sampler (REA & Compass Sector)
Basic Package:

    This basic package gives users the hard-to-fabricate system parts. By adding or building options investigators can tailor systems for their special needs. All of our Whole Air Samplers are built on this package -- which consists of:

  • Local SuperLogger - Local Supervisory control and data storage (REA Controller in diagram), stores up to 2 GBytes of raw and processed data, switches and passes power to connected components, provides LCD-SVGA display, user keyboard (no-mouse), software packages, configuration files... See Local SuperLogger Specifications

  • Segregator - connects to the SuperLogger (REA Segregator in diagram) - divides the sample air into three paths - sonic anemometer data and configuration files provides the software with the information to control the Segregator's valves and pump. Flow rates from 30 ml/min to 1000 ml/min. Pump uses brushless DC motor for long life and high reliability... see Whole Air Segregator Specifications

  • An Accumulator Control Kit connects to SuperLogger providing valves and control for two sets of UP and DOWN bags. Options are available for more bags. In many cases, the accumulator controller can manage and store data from an analysis sub-sustem. For examples of accumulators we have built see, Our Accumulators

  • Basic Cable Set - 20 meter HT-LAN cable to Segregator, 20 meter VIN cable to Segregator, 5 meter control cable to Accumulator Control Board Set, 5 meter VIN cable to Accumulator.

  • Software loaded in local flash memory: HT-DOS, REA application, Compass Sector Accumulation application, test utilities, configuration utilities, configuration files, logging utilities

  • Documentation: Operator Manual, block diagrams, Accumulator Board Set valve connection schematics

    The basic system needs more to actually work and these things are not included in the basic system:

  • A sonic anemometer (Applied, Campbell, etc.) - each sonic needs an interface synchronizing its output to the master clock and in some cases, converting its native connection to that required by the Segregator, (Sonic Anemometer Specifications)

  • Teflon tubing enough to connect the Segregator to the accumulator and the accumulator valves to the bags,

  • fittings for the tubing, [The Accumulator Control Kit needs a cross for each valve board and fittings to connect to the bags.]

  • Tedlar bags enough for the experiment,

  • a frame to hold the accumulator bags and Accumulator Control Kit,

  • a DC power supply (10-30 VDC @ 75 Watts, more depending on accumulator and other accessories), and perhaps

  • longer cables. [HT-LAN and VIN cables come in these standard lengths -- 10, 20, 50, 100, 200 and 500 meters. The sonic, and Segregator use these cables for connection back to the Local SuperLogger. HT-LAN cables carry two-way data and VIN cables carry power; both can be as long as 500 meters; they can be custom sized to that limit. The connectors on these cables allow linking them together.]

Complete Custom Packages:

Hampton Technologies builds, assembles and tests complete REA and Compass Sector Conditional Whole Air Samplers - including REA Systems augmented with an open path infrared gas analysis (IRGA) generating near real-time CO2/H2O/heat flux values. Packages always include the basic package above and can include:

  • Sonic anemometer
  • CO2/H2O/Heat Flux IRGA
  • Power supply - 28.4 VDC @ 10 Amps output, 100 - 250 VAC 50/60 Hz input
  • Analog-to-digital converter (specs) Remote Terminal Unit - precision (16 bit, 8X oversampling), high-speed (synchronized at 20 Hz), precision temperature compensated reference voltage and ground noise sampled with the 14 analog inputs.
  • Very robust shipping and storage case.
  • Four or six bag automatic accumulator
  • Custom accumulators up to 200 sets (so far, 16 is largest built)
  • Complete supply of Tedlar bags, spare septum material, needles and Teflon tubing.
  • Spare valves and pump.
  • Spare cables
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