The Percometer is a reliable, accurate, lightweight and easy-to-use instrument for measuring the dielectric value (er), electrical conductivity (J) an temperature of materials indoors and outdoors. Dielectric value is an indication of the volumetric moisture content and the state of molecular bonding in a material. Electrical conductivity is a reflection of ionic concentration, water content and temperature.
The Percometer utilizes two basic probe types, of which there are some variations. The surface probe has been designed for measuring tile walls, aggregate samples and liquids. While the probe utilizes non-destructive technology, its measurements have an effective penetration depth of 2 - 3 cm, depending on the medium. The tube probe has been designed for insertion into soft materials (minimum depth 10cm required for accurate measurements) and is ideal for measuring forest soils and road subgrade. Percometer permits the use of multiple probes with the same central unit. Each probe is identified by the central unit by its unique probe number, and uses a probe-specific calibration table in the central unit’s memory.
Surface Probe SF (60mm dia.)
Short Tube Probe TVS (L = 18 cm)
|The Percometer can be operated in two different modes:
Local Operating Mode: the standard mode of operation
when using the Percometer as a hand-held stand-alone
measuring instrument. All relevant information is
displayed on the unit’s LCD and the device itself is
operated using an integrated keyboard.
Remote Operating Mode: the Percometer is operated,
via modem or serial connection, using special software
supplied with the unit. All relevant values are shown on
the PC display and the central unit’s integrated keyboard
Dielectric value (er) measurements
• Measurement range varies according to probe type
• Measurement frequency: 40 - 50 MHz
• Measurement method: er is measured through the change in the electrical capacity of the electrode (probe)
attributable to the influence of the material being
measured. The term dielectric constant er is used here to
indicate the real part of the complex relative dielectric
• er measurements are reliable when the conductivity of the material being measured is:
< 1000 μS/cm for Tube Probe measurements
< 2000 μS/cm for Surface Probe measurements
Conductivity (J) Measurements
• Measurement range: 0 to 9999 μS/cm
• Measurement frequency: 2 kHz square wave signal
Data storage, PC connection
• Number of measurements stored: 1000
• 24 calibrated probes can be attached to a Percometer:
• Data transfer to PC via RS232; modem optional
Power supply and battery management
The Percometer is powered by an internal 12 V, 1.5 Ah battery, which ensures a minimum of 8 hours continuous operating time. It can also operate using a +9 to +14 V external power supply.