SRS-2000 Intelligent Portable flux System

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SRS-2000 Intelligent Portable flux System

Soil respiration can be defined as the net CO production and O consumption of a soil. The amount of gas exchange taking place is frequently used as an indicator of microbial soil activity. Because micro-organisms are the driving force for many biochemical processes (decomposition, humification etc.) their activity in the soil is sometimes used to characterise the “health” of that soil.

In practice soil respiration is produced by many organisms within the soil including roots, bacteria, fungi, protozoa, fungi and animals. The rate of soil respiration, or flux, can be influenced by many parameters including organic matter content, soil moisture and soil temperature.

Interest in the relationship between soil respiration and environmental parameters has increased in recent years as global warming and increasing atmospheric CO levels have risen up the international political agenda.

Features

Truly portable
Highly accurate CO₂ IRGA
Optimized soil chamber
No pressure gradients
Insensitive to wind currents
Automatic CO₂ / H₂O control
Graphic display

Specifications

Gas Exchange

CO₂
0-2000ppm, 1ppm resolution Infrared gas analyzer 0.1% of reading repeatability @ 350ppm Temperature effect <0.05% of f.s.d. per °C

H₂O
0-75mbar, 0.1mbar resolution two fast response water vapor sensors 0.5% repeatability

Other Sensors

Chamber Temperature
0°C to 50°C, precision 1.5%. Precision thermistor.

Soil Temperature
0°C to 50°C, precision 1.5%. Precision thermistor.

PAR
0-3000µmols m^-2 sec^-1. Silicon photocell

Flow Rate to Chamber
100 - 500ml min^-1

CO₂ Control
0-2000ppm using CO₂ sparklet bulbs. Automatic single point and sequential level programming.

H₂O Control
0-100% non condensing using conditioning chemicals. Automatic single point and sequential level programming.

Display
Graphic display 240 x 64 dot matrix LCD

Warm up Time
5 minutes @ 20° C

Recorded Data
Removable RAM cards typically stores 8,000 sets of data on a 512K byte card. Up to 1MB cards supported.

Battery
6.8Ah lead acid 12V battery. Up to 16 hour life

Battery Charger
90-260V, 50/60 Hz

RS-232 Output
User selected up to 38400 baud for printers or PC connection

Operating Temperature Range
5°C to 45°C

Dimensions

Chamber Volume
1L

Console (HxWxD)
9 x 4.3 x 6.7 in. (230 x 110 x 170 mm)

Soil chamber (HxWxD)
.4 x 3.3 x 5.7 in. (11 x 85 x 145 mm) (ellipse)

Weight

Console
9.7 lbs. (4.4Kg)

Soil Chamber
.42 lbs. (190 grams)