The pF-meter delivers exact, high-resolution measurements for physically-stable substances (volumetric heat capacity, see Fig. 1).
Due to the latest measurement methods, the pF-Meter is able to record the matrix potential under equilibrium conditions (e.g. in a soil) over a large measurement range from pF 0 to pF 7.0 (see Fig. 2); this is possible with a very high resolution never reached before (see Fig. 3).
Figure 1:
Sensor measurement data of stable substances
Figure 2:
Sensor measurements within a controlled evaporation experiment up to pF 5.6
Figure 3:
Sensor measurements in a sandpit experiment. The quick reaction of the pF-meter at a sudden change of the matrix potential is evident
Figure 4:
down: typical running of pF-values during the summer 2006.
top: rain events (blue dots), surface temperature (red line)
wireless data logger (433 / 915 MHz) / M-Log5W
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small dimensions waterproof housing high storage capacity high data security variable scan cycle low energy consumption Lithium Battery (removeable) logger access protection user friendly software wireless interface |
- 140mm x 20mm (housing without sensor) - plastic or stainless steel housing/ IP69 - up to 400.000 messure values / 2.048 kb - flash memory / not volatile - 2s to 12h - up to 10 years with one battery - 2.400 mAh / -55C to + 85C / Li-COCl2 - 4 digit access code - GP-Shell5W (Windows 95/98/XP/Vista/7) - operating rang up to 50m |
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M-Log5W-CABLE
cheap temperature data logger with senor cable in waterproof plastic housing
cable length of the sensor: default 25 cm, max. 250 cm
sensor type: PT1000 in stainless steel cap
accuracy: +/- 0.1°C (at 0°C)
resolution: 0.01°C
cheap temperature data logger with senor cable in waterproof plastic housing
cable length of the sensor: default 25 cm, max. 250 cm
sensor type: PT1000 in stainless steel cap
accuracy: +/- 0.1°C (at 0°C)
resolution: 0.01°C
GeoPrecision Products
The manufacture and developement of innovative products for environment measurement is the cor expertise of GeoPrecision.
GeoPrecision Products are well known for their reliablility over many years thanks to their high technical standard and well-thought-out technology.
internet data logger / i-Log3V and i-Log12V
The universal data logger works autonomous with energy-saving GPRS transmission technology.
Designed for efficient data management with worldwide access.
DATA LOGGER VARIANTS
- i-Log-3V - internal power supply with
.................. two 1.5 volt batteries / type D-cell - i-Log12V - external power supply 12-14V
................... optimized for solar pannels
TECHNICAl SPECIFICATIONS
energy-saving
very economical GPRS-transmission/ only 0.05 to 0.5 Euro cent per transmission
bidirectional internet access / field logger can be programmed over home PC
digital SDI12-bus / up to 48 digital channels
rugged aluminium housing / IP67
local data access to the logger via radio transmission / 433 MHz, range up to 100 meter
large and save flash RAM / 100.000 to 500.000 measure values
ACCESSORIES FOR THE SDI12-BUS
- SDI12-analog converter..........................access: 6 analoge sensors, +/- 2.5V
- SDI12-redox-probe converter.................access: reference elecrode + 7 time redox probe
- SDI12-pH-probe converter......................access: reference elecrode + 7 time pH-probe
- SDI12-SENSIRION-converter.................access: 1 digital air humidity/temperature sensor, SHT75
- SDI12-temperature-string converter.....access: up to 48 PT1000-temperature sensors / up to 100m