Measure the Whole Range!


The PL-300 is a field and lab measurement instrument to determine the pneumatic conductivity of soils. This value describes the waterfree pore space of the soil and is a function of water content. A defined air flow is generated using a measurement chamber in the soil volume investigated. The rate of flow is determined from the drop in pressure through a calibrated two stage measurement throttle in the PL instrument. The pressure difference above the soil volume is recorded by a further pressure sensor and supplies the pressure gradient of this flow. The pneumatic conductivity is calculated from these test parameters using the DARCY equation and shown in the instrument display.

The PL-300 also has connections for an electronic soil tensiometer and a moisture probe so that soil moisture tension and/or soil moisture may be recorded parallel to each other. For this purpose UGT provides a specially adjusted Tensio 150 tensiometer and a TDR moisture probe each with the suitable plug. The data of all connected sensors as well as the calibration data of the measurement chambers and a marking of the measurement point are saved and managed by a microcomputer within the instrument. Its compact and rugged design make the PL-300 a practical and portable field measurement instrument.

PL-300 measurement chamberfor homogenous flow accordingto DARCY with integrated pressureprobe

  • PL-300 measurement chamber for homogenous flow according to DARCY with integrated pressure probe
  • PL-300 surface measurement chamber for inhomogeneous flow in undisturbed soil volume
  • PL-300 soil sample ring adapter for the measurement of soil sample rings


use of the PL-300 in the lab with soil samples 250 cm³




Technical Specifications

Measurement range for pneumatic conductivity:0,03 ... 30 cm/s
Measurement pressure:1 ... 3 hPa
Settling time:ca. 2 s
Diameter of the measurement chamberr:72 mm



Ordering Details:

Art.-Nr.:  1470000  




Related Products:

PL-300 soil moisture probe UMP

For the parallel measurement of the soil moisture and pL

PL-300 Tensio 150 pressure transducer

For the parrallel measurement of soil
moisture tension and pL

PL-300 calibration valve

For the calibration of the PL-300

PL-300 soil sample ring adapter

pL measurement of the soil sample ring

PL-300 surface chamber

pL measurement of undisturbed soil

PL-300 measurement chamber
according to DARCY

pL measurement with homogenous flow



Principal Office Müncheberg

Umwelt-Geräte-Technik GmbH
Eberswalder Str. 58
15374 Müncheberg
Tel.: +49 (0) 33432 7559-0

Branch South

Umwelt-Geräte-Technik GmbH
Munich Airport Business Park
Lindberghstr. 7a
85399 Hallbergmoos
Tel.: +49 (0) 811 124478-0