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products RoHS WO81 WO71 FR51A MS99 MS99S MS61A-RA QDP33 EMD8A EMD7 EMT1 EMTGP1 EMT1H EMT6 EMP5A EMRT1 HWS15A Acossures Application Precautions Maintenance
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products WO81 WO71 FR51A MS99 MS99S MS61A-RA QDP33 EMD8A EMD7 EMT1 EMTGP1 EMTIH EMT6 V(m/s) = EMP5A EMRT1 HWS15A docsons Application Precautions Ilaintarance ○ Set the tip straight pipe part of the Pitot tube in parallel to the flow. As the measurement points, set the 10 points on each of two diameter lines that cross each other at the right angle on the measurement pipe cross section, 20 points in total, as shown in the formula on the right. However, as this method requires substantial time and effort, it is not suitable for commercial use. ○ Use of a composite Pitot tube, in which Pitot tubes in large number are used, is convenient. ○ Method to obtain approximate flow rate by measuring the maximum airflow speed at the center of pipe with a single Pitot tube Flow rate = Maximum airflow speed × Pipe cross section area × 0.9
NEW AEROEYE *NEW AEROEYE is a product manufactured and sold by Wetmaster Co., Ltd. Total pressure – Static pressure = Dynamic pressure (Pa)
Measurement of airflow rate by means of the Pitot tube
Pt (total pressure) = Ps (static pressure) + Pd (dynamic pressure) 1. Method of installing static pressure pipe and total pressure pipe at a distance D between them. (Refer to page 116) 2. Method of installing overall/static pressure pipe
Measurement method of static pressure and dynamic pressure
The measurement method for flow speed using the Pitot tube is relatively simple and highly reliable, but as the airflow speed decreases, the detection pressures (total pressure, static pressure) and the differential pressure (dynamic pressure) between them also decrease, and accurate measurement is disabled at an airflow speed of 2 m/s or lower. Calculation formula of flow speed by means of the Pitot tube Where, ρ: Fluid density (kg/m²) Pt: Total pressure (Pa) Ps: Static pressure (Pa) Density of dry air at 0°C and one atmosphere   p=1.293 kg/m³ (Pt—Ps) To know a flow speed, only measuring the dynamic pressure of the flow obtains it. However, the dynamic pressure cannot be directly measured. Therefore, use the formula below. Total pressure – Static pressure = Dynamic pressure The dynamic pressure can be obtained from the differential pressure between the pressure at the total pressure pipe and that at the static pressure pipe. 1. Method using static pressure pipe 2. Method using a static pressure hole, which is a smooth hole made along duct inner wall so that no protrusion into the duct is made 3. Method using pipe (simplified Pitot tube) at an orthogonal angle to the duct inner wall. However, to use this method, the flow speed must be 1 m/s or below. If the flow speed is higher than that, the error will be greater because of the influence of the dynamic pressure.
Measurement method of dynamic pressure
Measurement method of static pressure
Measurement method of static pressure and dynamic pressure

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Guide for Pitot tube installation location
WO81 Depending on the pipe layout, the flow may be disturbed, which may affect the measurement accuracy. Therefore, when installing a Pitot tube, we recommend securing a sufficient straight pipe length equal to or greater than the WO71 FR51A MS99 MS99S MS61A-RA QDP33 EMD8A EMD7 EMT1 EMTGP1 EMT1H EMT6 EMP5A EMRT1 HWS15A Acossories Application Precautions Maintenance
_Warranty period The warranty period for our product is one (1) year from delivery to the location specified by the orderer who makes a direct transaction with us.
IScope of warranty
If any failure or defect attributable to us becomes clear during the above warranty period, we will repair the product or supply a substitute product free of charge. However, even during the warranty period, we will exclude the product from the scope of the warranty if the failure or defect corresponds to any of the following: (1) The failure or defect was caused by an unreasonable condition, environment, handling, or usage not mentioned in the instruction manual, specifications, and our product catalog. (2) The failure or defect was caused by a factor other than our product. (3) The failure or defect was caused by a modification or repair conducted by a party other than us. (4) The failure or defect was caused by an event that could not be foreseen at the scientific and technical levels at the time of product shipment from us. (5) The failure or defect was caused by an external factor not attributable to us, such as acts of God and disasters. Please note that the warranty mentioned here means the warranty for our individual product, and damage provoked by a failure or defect of the product is excluded from the scope of the warranty. *This warranty is valid only in Japan.
Application and usage
Our products are designed and manufactured as general-purpose instruments for general industries. Therefore, our products are not intended for the following uses, and our products used in such a manner are outside the scope of application. (1) Equipment that is anticipated to greatly affect lives and properties, such as nuclear power generation, aviation, railways, marine vessels, vehicles, and medical devices (2) Utilities that include electricity, gas, and service water (3) Use in outdoor locations and under similar conditions or environments other than those stipulated in the instruction manual (4) Usage to which considerable safety consideration and attention equivalent to (1) and (2) above need to be given
Service
Scope of service Because the product price does not include service expenses, such as the dispatch of engineers, we will separately charge for the expenses in the following cases: (1) Instruction for installation and adjustment and a witnessed test run (2) Maintenance inspection, adjustments, and repairs Technical guidance and technical education (4) Witnessed inspections of products at our factory <<Note>>   The product specifications and information in this catalog are subject to change without prior notice for product improvement or other reasons. ●For order placement, contact 1-2-3 Nishishiriike-cho, Nagata-ku, Kobe City, Hyogo 653-0031 TEL. +81-78-631-6000 FAX. +81-78-631-6020