The measurement of steady state water surface position is frequently needed during hydraulic investigations. This is done by using a small point or hook manually adjusted to touch the water surface, and a reading is taken of the vertical movement using a scale or vernier.

H1-10: this stand is suitable for use with vernier type Hook & Point gauges
(H1-1, H1-2, H1-3) and the Pitot Tubes (H30). It is essential for the convenient use of the gauges in physical models.

A range of general purpose laboratory manometers using liquid displacement to measure differential pressure.
Right:

H12-5 (500mm scale differential kerosene over water manometer)  and
H12-4 (500mm scale differential water over mercury manometer)

A versatile, hand held, battery operated portable pressure meter capable of measuring  pressures  of  water  or  air  from
0 - 2000mBar (0 - 1500mmHg).
This unit is particularly suitable for use in applications where Mercury manometers have traditionally been used. The use of Mercury is not desirable in a laboratory environment due to its hazardous nature.

A versatile, hand held, battery operated portable pressure meter capable of measuring pressures of water or air from 0 - 140mBar (0 - 99.99mmHg).

The Armfield H14/2 is designed to replace banks of manometers when used in conjunction with a number of Armfield products. Sixteen simultaneous pressure measurements can be displayed on a user supplied computer and the information data logged.
Two modes of operation are available:

Mode 1: 16 general purpose channels (350mm H20), with a common reference, suitable for monitoring both wet and dry systems.
Mode 2: 14 general purpose channels as above, plus 2 differential high sensitivity channels (125mm H20 differential), for accurate measurement of low pressures (suitable for dry air only).

A direct indicating gauge which eliminates observation errors due to vernier and scale reading. It can be set to zero anywhere in the operating range to permit easy relative level checking. The liquid crystal display is easy to read and has a resolution of ±0.01mm. A push button gives immediate change to inches from millimetres if required. A quick-release mechanism permits rapid changes of position.

A range of Pitot tubes for the measurement of water velocity in open channels and closed ducts.

Used to measure and record very low point velocities in water and other conductive fluids, this meter uses the change in impedance of a rotating multi-bladed impeller to indicate rotational speed caused by the flowing fluid. The fine diameter of the sensory head enables the meter to be used in small ducts and channels with an ability to measure fluid velocities as low as 25mm/sec.
A probe and digital indicator are required in combination to perform measurements but the digital indicator is supplied separately from the probes to allow an appropriate probe to be selected to suit specific applications.

Each probe consists of a sensing head that is mounted at the end of a slim stainless steel stem. A co-axial connector at the top of the stem allows the probe to be connected to the H33-10 Digital Indicator.

A simple and robust instrument for the measurement and recording of water waves in hydraulic models and ship tanks, which works on the principle of measuring the electrical conductivity between two parallel wires.

The H41 uses particle image velocimetry (PIV) to measure, non-intrusively, fluid velocities at multiple points in a flow, at a rate of up to 16Hz. The compact and portable hardware (which uses a safe, non-pulsed, Class 3b laser) and the extremely easy to use software with real time display, make this an ideal tool for undergraduate teaching and demonstration.
With its sophisticated multi-pass processing, the H41 matches the performance of higher power PIV systems costing several times more. It is therefore also an ideal, cost-effective tool for experimental fluid dynamics research.
The intuitive software provides a wide range of processing, display and recording functions for both velocity and derived statistical data, using a standard pc.