Flow probes for special applications
For measuring Temperature, Total and Static Pressure, Velocity and Flow, Direction of Fluids, Gases and Liquids
Special Flow Probes
Pitot - Static probes sense total and static pressures at the same point in a moving fluid. These measurements are often sufficient for calculating flow velocity and weight flow rate if the density is known. As a fluid's density is often a function of its temperature, it may be necessary to measure temperature in addition to velocity pressure. Pitot - Static probes may standardly be equipped with a thermocouple for simultaneous temperature measurements at the same point in the fluid stream as pressure measurements
The Type "S" (Stauscheibe) or Reverse Pitot-Static probe measures velocity, weight flow rate, and related volumetric quantities of a moving fluid. The probe consists of two stainless steel tubes with impact holes oriented at 180° angles to one another, One hole faces upstream for the measurement of total pressure (PT); the other is aligned in a downstream direction for static pressure (PS) measurement. The difference between these two pressures (PT - PS) approximately equals 150% of the velocity pressure (PV) of the fluid. PV approximation must be corrected to true value through proper calibration to the particular flow situation.
Temperature/ Thermocouple Probes are used to measure total temperature of air, gas, or liquids in Industrial, Aircraft/ Missile and special purpose applications. These probes measure up to 2000°F in velocities from 100 to 2000 ft/sec. A complete line of Exposed - Loop, Insulated Junction, Grounded Junction, Radiation Shielded, Stagnation Shielded and Aspirated probes are available. All probes are primarily constructed of stainless steel
Kiel probes are used to measure total pressure in fluid stream where the direction of flow is unknown or varies with operating conditions. Their correction factor is 0 when used within the ranges outlined below, True total pressure is indicated up to a Mach Number of 1.0. There is a slight drop in yaw in sensing range above Mach Number 0.3m. This decreases averages about 4% for all types at a Mach Number of 1.0
Gas Sampling probes have been designed for accurate sampling of burner exhaust gases primarily used in efficiency studies of combustion and they have been endurance tested in routine test work.
Conical Probes are generally used for static pressure, total pressure and direction measurement in supersonic streams. The straight heads are usually mounted in a special holder
Directional probes are used to measure total and static pressure, yaw and pitch angle, and total temperature. Some of our probes indicate all five quantities.
3 Dimensional Directional probes measure yaw and pitch angles of fluid flow, as well as total and static pressures and total temperature. Each probe has five measuring holes located on its tip
Boost Venturi Probes are used to amplify the measured velocity pressure in a flowing fluid. The measured total pressure is unchanged from a Pitot-Static reading but the flow is accelerated in the venturi passages, as in a flow nozzle, so the static pressure reading is lower than that obtained with a Pitot-Static probe
stainless steel Boundary Layer Probes measure total pressure of a fluid near solid boundaries. Sensing head diameters for these probes are constructed down to .025", with flattened measuring tips to minimize potential errors in total pressure measurement due to flow turbulence or acceleration
A Traverse unit measures distance in increments of 0.01" on a scale graduated in divisions of 0.1" with a vernier. Standard scale lengths are 6", 12", 18", 24", 30", 36", 25cm, 50cm, 75cm, 100cm, but other lengths can be custom manufactured
Pressure and / or Temperature Rakes measure a cross-section of total pressure, static pressure and / or total temperature of a moving fluid. Rakes offer the advantage of providing many separate readings simultaneously or a simple average of many readings