Description

The H40-MKII Wave Probe System is a modular data acquisition solution designed to monitor wave activity with high precision.
As standard, it supports up to eight wave probes. However, multiple H40-MKII units can be linked together to accommodate up to 16 probes, enabling users to either enhance measurement precision or extend the monitoring range.

Each H40-MKII case houses the necessary signal conditioning boards and probe connection interfaces. The rear panel includes a power supply port and network connections, allowing direct connection to a computer.
System configuration is managed via a built-in web interface. During operation, the acquired data is transmitted over the network for collection by compatible software (not supplied by Armfield).

The wave probes consist of two parallel stainless steel rods with a plastic head and foot. Up to four different probe lengths can be used, offering flexibility for various testing environments. The head is attached to a calibration stem, which can be mounted to any vertical surface using the supplied mounting block. Additionally, Armfield offers optional stands and tripods for alternative mounting setups.

Each probe functions by measuring the electrical current flowing between the immersed stainless steel rods. This current is converted into an output voltage that is directly proportional to the depth of immersion. To prevent polarization effects at the probe, a high-frequency square wave is used for energising.
To avoid interference when probes are placed close together, adjacent probes operate at different frequencies. Each channel includes circuitry that compensates for the resistance of the connecting cable, ensuring a linear and accurate output.