Vernier caliper

Jun 30, 2010 · Spurtar Vernier Caliper, 6" Stainless Steel Non Digital Calipers, 0-6Inch/0-150mm Manual Micrometer Caliper Measuring Tool, 0.001"/0.02mm High Precision Durable Slide Caliper 4.4 out of 5 stars 6,972

Vernier caliper. The manual Vernier calipers are still much preferred by people, as they are much cheaper than the digital ones and are not dependent on power. Preparations for Using Vernier Caliper. The different parts: Vernier caliper has two jaws. The small jaw is used to measure the internal diameter of items, and the big jaw is used to measure the external ...

A vernier calliper is a device for measuring linear dimensions and diameters of round objects. Learn how to use it, its diagram, parts, zero error, and applications with examples and solved problems. Find out the …

A Vernier thruster is a rocket engine used on a spacecraft for fine adjustments to the velocity of a spacecraft. The name is derived from Vernier calipers (named after Pierre Vernier) which have a primary scale for gross measurements, and a secondary scale for fine measurements. Another great alternative to check out is the VINCA DCLA-0605 Digital Vernier Caliper. This alternative is made with high accuracy, high-quality, and sturdy materials, confirming an accurate reading and measurement. The VINCA DCLA ranges from 0 to 6 inches with a precision of ±0.001 inches.Aug 22, 2007 · Spurtar Vernier Caliper, 6" Stainless Steel Non Digital Calipers, 0-6Inch/0-150mm Manual Micrometer Caliper Measuring Tool, 0.001"/0.02mm High Precision Durable Slide Caliper 4.4 out of 5 stars 6,800 What Is Vernier Calliper? A vernier calliper is defined as a measuring device that is used for the measurement of linear dimensions. It is also used for the measurement of diameters of round objects with the help of the measuring jaws. Vernier Calliper Diagram. French mathematician Pierre Vernier invented the vernier scale in 1631.Calipers in bow spring joint or vernier styles accurately measure interior or exterior diameters and are the go-to measuring tools for any professional use. The adjustable nut in the bow spring joint caliper offsets the spring, allowing the leg position to be determined. While these calipers need to be used in conjunction with a separate ruler ...Calculated Industries AccuMASTER Digital Vernier Caliper Stainless Steel 6 in. Tool Displays Fractions to 1/64 in Decimal Inches, Millimeters – There are a few things I really like about this digital caliper. Although, I own other digital calipers, that I use frequently, and dial-indicator calipers that measure in thousandths and fractions ...Digital Caliper Measuring Tool, Stainless Steel Vernier Caliper Digital Micrometer with Large LCD Screen, Easy Switch from Inch Metric Fraction, 6 Inch Caliper Tool for DIY/Household. 4.7 out of 5 stars. 5,452. 8K+ bought in past month. $19.98 $ …

Jul 15, 2016 · Digital Caliper Measuring Tool, Stainless Steel Vernier Caliper Digital Micrometer with Large LCD Screen, Easy Switch from Inch Metric Fraction, 6 Inch Caliper Tool for DIY/Household dummy Digital Calipers,Electronic Digital Calipers,YKLSXKC LCD Screen displays 0-6"Caliper Measuring Tool,inch and Millimeter Conversion, Suitable for Jewelry ... Step 1: Holding the Caliper. This is the proper way to hold a caliper. Use your thumb to slide the jaws open and closed. Yup, another tool that was totally designed for righties. Use the locking screw at the top if you want to set a dimension on the caliper and then check parts against your setting.Maximise the amount of contact area between the Vernier caliper and the part; this will help you to keep the caliper square. Reading the Vernier. Vernier calipers come with a variety of scales; in my opinion the most useful ones come with two scales: A metric scale with a resolution of 0.02 mm. An imperial scale with a resolution of 0.001 in ...Find a wide range of vernier calipers for different purposes and budgets on Amazon.com. Compare prices, ratings, features and reviews of digital, plastic, stainless steel and brass …The vernier calipers are available for purchase. We have researched hundreds of brands and picked the top brands of vernier calipers, including TamBee, Ultrassist, Mitutoyo, Dasqua, WONDERSUNM. The seller of top 1 product has received honest feedback from 343 consumers with an average rating of 4.9.Best Sellers in Vernier Calipers. #1. Digital Caliper, Caliper Measuring Tool with Stainless Steel, Electronic Micrometer Caliper with Large LCD Screen, Auto-Off Feature, Inch and …A vernier caliper (or vernier) is a common tool used in laboratories and industries to accurately determine the fraction part of the least count division. The vernier is a convenient tool to use when measuring the length of an object, the outer diameter (OD) of a round or cylindrical object, the inner diameter (ID) of a pipe, and the depth of a ...Vernier calipers. Vernier calipers can measure internal dimensions (using the uppermost jaws in the picture at right), external dimensions using the pictured lower jaws, and depending on the manufacturer, depth measurements by the use of a probe that is attached to the movable head and slides along the centre of the body.

SmartAsset ran the numbers to find the best cities for renters in America. Madison, Boston and Austin topped the list. While some surprisingly places like .. Calculators Helpful Gu...Vernier calipers consist of two main components: the main scale and the vernier scale. The main scale is the long, graduated scale that is typically marked in millimeters or inches. It is fixed to the body of the caliper …YAML(YAML Ain’t Markup Language)is a data serialization language. Common uses cases are configuration files, log files, internet messaging, data sharing. Receive Stories from @shve...The vernier scale allows for measurements with higher accuracy than what the main scale alone can provide. To read a Vernier Caliper accurately, follow these steps: Step 1: Familiarise Yourself with the Vernier Caliper. • Take a moment to examine the different parts of the Vernier Caliper. This includes the main scale (8), the vernier scale ...You can use vernier calipers underwater, if necessary. (It was often necessary.) I understand the problems people have with reading vernier calipers. I have taught people to use vernier calipers, and I found the following two tips helpful to everyone I have shared them with: 1. The zero line on the sliding part of the scale is actually a pointer.

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Dial Calipers. Dial Calipers are vernier scales with large circular dials for easy readouts and measurements. Our heavy duty calipers are designed for precise measurements of outside dimensions in both metric and imperial units. The sliding action ensures smooth operation, while the locking screw secures the measurement in place.The manual Vernier calipers are still much preferred by people, as they are much cheaper than the digital ones and are not dependent on power. Preparations for Using Vernier Caliper. The different parts: Vernier caliper has two jaws. The small jaw is used to measure the internal diameter of items, and the big jaw is used to measure the external ...Get out your parfait glasses and fresh fruit because these parfait recipes are healthy breakfasts that look like your favorite ice cream sundaes. When it comes to breakfast, option...Step 1. Review the Vernier caliper's parts. Notice how it has movable jaws and two measuring scales. One of the measuring scales moves with the jaws. Use the large jaws to measure objects from the outside; these jaws point to you as you read the caliper. Use the smaller jaws to measure holes and internal spaces, such as the inside of a pipe.eSynic Digital Vernier Caliper 6 inch/150mm + Feeler Gauge Stainless Steel Electronic Caliper Fractions/Inch/Metric Micrometer Measuring Tool for Length Width Depth Inner Diameter Outer Diameter . Visit the eSynic Store. 4.3 4.3 out of 5 stars 157 ratings. $25.55 $ 25. 55. Get Fast, ...

Summer squash and winter squash are related, but learn the key ways they differ and discover nine innovative recipes to try. If you’re looking to squash rumors about winter and sum...The vernier scale has finer divisions; in a standard basic vernier like in Fig 2., 10 divisions of the vernier scale correspond to 9 divisions of the main. The vernier divisions are marked 0 through 9 and then 0 again. This means that the divisions on the vernier are separated by 0.9mm. This pair of vernier calipers has an accuracy of 0.1mm.Read how these seven DevOps principles will guide your team to make smarter decisions and optimize your pipeline for higher quality software deliveries. Trusted by business builder...Vernier calipers use a simple linear input, to linear output while micrometers use rotary input to convert into rotary linear movement of the spindle. This enables micrometers to be generally more accurate. It also has the effect of making calipers easier to use. Micrometers can apply a large amount of force which if overtightened, can cause ...News. April 11, 2024. Mitutoyo America Corporation is pleased to announce the release of My.Mitutoyo 3.0, our latest update with several improvements for users.A short video on how to use and read a vernier caliper. If you have further questions, please ask us on our forum at http://demos.smu.ca/index.php/forum/indexVernier Calipers: The Best Helping Hand. Measurement tools are significant when they provide high-precision results. If you are planning to buy a tool online that measures the internal and external diameter of an object, go for Calipers. Calipers are the best option to measure the distance between the two sides of an object.Oct 18, 2019 · You can use vernier calipers underwater, if necessary. (It was often necessary.) I understand the problems people have with reading vernier calipers. I have taught people to use vernier calipers, and I found the following two tips helpful to everyone I have shared them with: 1. The zero line on the sliding part of the scale is actually a pointer. How to use a vernier caliper. Always calibrate the caliper before you start to use it, by closing the jaws and lining up the zero mark (0) on the scales. Now, place the object between the jaws and tighten them through sliding the moving scale. Do this until the jaws are against the object.Vernier Scale: The Vernier scale is the movable scale that slides alongside the main scale.It contains divisions that are slightly smaller than those on the main scale, allowing for more precise readings. Jaws: At the end of the Vernier caliper, you’ll find two sets of jaws. The upper jaws are used to measure external dimensions, while the lower …Buy VINCA Digital Caliper, DCLA-0805 0-8 Inch/200mm, Inch/Millimeter/Fractions Conversion, Stainless Steel, ... Proster Digital Vernier Caliper 8inch/200mm Digital Calipers Dial Calipers Measuring Tool Electronic Caliper Fractions/Inch/Metric Caliper Gauge for Length Width Depth Inner/Outer Diameter.

Jun 24, 2021 · Vernier Caliper PYQs PDF - https://bit.ly/3wSwErrScrew Gauge Explained and PYQs - https://youtu.be/gYd2PtmZ0mw😍 Download Printable Format BEST Short Notes -...

Apr 22, 2024 · Which Vernier Sensors Should I Use to Explore the Respiratory System? Understanding the respiratory system is a fundamental component of human physiology that provides students with critical insights into how their bodies function. For educators looking to support their human physiology lessons with technology, Vernier offers a variety of ... Electronic Digital Caliper, Plastic Vernier Caliper, Caliper Measuring Tool with Inch/Millimeter Conversion, Extra Large LCD Screen, 0-6 Inch/0-150 mm, Auto Off Featured Micrometer Ruler. 4.4 out of 5 stars. 1,739. 200+ bought in past month. $10.99 $ 10. 99.Vernier Caliper. Item # 60260. $4.99 . Shipping: Available now See Shipping Options. Store Pickup: Check Store Stock. Add to Cart. Activating this checkbox will add this item to the product comparison tool. Compare Save to List. Klutch 12in. Dial Caliper. Item # 57851. $64.99 . Shipping:Digital Caliper Measuring Tool, Stainless Steel Vernier Caliper Digital Micrometer with Large LCD Screen, Easy Switch from Inch Metric Fraction, 6 Inch Caliper Tool for DIY/Household. 4.7 out of 5 stars. 5,478. 7K+ bought in past month. Limited time deal. $15.98 $ 15. 98. List: $26.99 $26.99.ACCUD 300mm Dual Scale Long Jaw Vernier Caliper AC-126-012-12 $ 447. Add to Cart. Free Delivery . Add to Wishlist Add to Compare. MOORE & WRIGHT 0-150mm/0-6inch Precision Vernier Caliper MW-110-15I $ 88 95. Add to Cart. Add to Wishlist Add to Compare. MOORE & WRIGHT 0-300mm/0-12inch Precision Vernier Caliper MW-110-30 ... Ultrassist Plastic Vernier Caliper (2pcs), 150 mm Mini Plastic Caliper for School Student, Portable 0-6 Inch Measuring Tools, Sliding Gauge. 270. 2 offers from $6.64. #3. TamBee 6Inch 150mm Mini Caliper Double Scale Plastic Vernier Caliper for Jewelry Sliding Gauge Ruler Measuring Tool 5PCS (Black) 753. Metric vernier caliper, (calliper or pachymeter), read in millimeter and vernier scale 0.05 mm. The vernier caliper, is a measuring instrument equipped with a scale and a cursor that slides in itself. In the cursor is recorded a second scale called vernier scale or nonius. At one end of the scale there is a beak with a perpendicular face on it. Apr 22, 2024 · Which Vernier Sensors Should I Use to Explore the Respiratory System? Understanding the respiratory system is a fundamental component of human physiology that provides students with critical insights into how their bodies function. For educators looking to support their human physiology lessons with technology, Vernier offers a variety of ... A Vernier allows a precise reading of some value. In the figure to the right, the Vernier moves up and down to measure a position on the Scale. This could be part of a barometer which reads atmospheric pressure. The "pointer" is the line on the vernier labelled "0". Thus the measured position is almost exactly 756 in whatever units the scale is ... A Vernier allows a precise reading of some value. In the figure to the right, the Vernier moves up and down to measure a position on the Scale. This could be part of a barometer which reads atmospheric pressure. The "pointer" is the line on the vernier labelled "0". Thus the measured position is almost exactly 756 in whatever units the scale is ...

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Spurtar Vernier Caliper, 6" Stainless Steel Non Digital Calipers, 0-6Inch/0-150mm Manual Micrometer Caliper Measuring Tool, 0.001"/0.02mm High Precision Durable Slide Caliper 4.4 out of 5 stars 6,972Reading Vernier calipers is a two-step process because of its two scales. The main scale gives you the whole number and one decimal place after it. On an inch Vernier caliper, each increment on the main scale represents one-tenth (.1) of an inch. Each division in between each tenth of an inch represents twenty-five thousandths (0.025) of an inch. The meaning of VERNIER CALIPER is a measuring device that consists of a main scale with a fixed jaw and a sliding jaw with an attached vernier. A Vernier thruster is a rocket engine used on a spacecraft for fine adjustments to the velocity of a spacecraft. The name is derived from Vernier calipers (named after Pierre Vernier) which have a primary scale for gross measurements, and a secondary scale for fine measurements. ACCUD 300mm Dual Scale Long Jaw Vernier Caliper AC-126-012-12 $ 447. Add to Cart. Free Delivery . Add to Wishlist Add to Compare. MOORE & WRIGHT 0-150mm/0-6inch Precision Vernier Caliper MW-110-15I $ 88 95. Add to Cart. Add to Wishlist Add to Compare. MOORE & WRIGHT 0-300mm/0-12inch Precision Vernier Caliper MW-110-30 ...The Mitutoyo 534 series long jaw vernier caliper has two-way measurement capability for outer diameter (OD) and inner diameter (ID) in metric units, with long jaws for performing hard to reach measurements. The calipers have a dual vernier scale, with both the upper and lower scales measuring in metric, and each graduated to 0.02mm.Pocket. Digital. Digital. This fractional scale vernier caliper is graduated in 16 in. and millimeters. (1/10 mm) Easy to glide roller with friction stop. This economical steel vernier caliper has a 5 in. capacity with 3 ways measuring inside, outside and depth.Vernier Scale: The Vernier scale is the movable scale that slides alongside the main scale.It contains divisions that are slightly smaller than those on the main scale, allowing for more precise readings. Jaws: At the end of the Vernier caliper, you’ll find two sets of jaws. The upper jaws are used to measure external dimensions, while the lower …These vernier calipers with long jaws come with or without fine adjustment and let you measure hard-to-reach features. They offer you the following ... ….

The vernier scale subdivides the least count from the main scale into 10, 50 or 100 subdivisions. Vernier scales are found on a wide range of instruments. In Section 2 we will discuss the vernier caliper. Any instrument that uses a vernier will have two scales, a main scale and a vernier scale as is seen in Figure 2. A measurement is made by ...Least Count of Vernier Caliper . In simple words, the least count (or vernier reading) of a vernier caliper is the smallest distance that the caliper can measure. The least count of vernier caliper is calculated as the difference between the value of 1 division of the Main scale and 1 division of the Vernier scale. LC = 1M.S.R – 1 V.S.RWhich Vernier Sensors Should I Use to Explore the Respiratory System? Understanding the respiratory system is a fundamental component of human physiology that provides students with critical insights into how their bodies function. For educators looking to support their human physiology lessons with technology, Vernier offers a variety of ...Jun 24, 2021 · Vernier Caliper PYQs PDF - https://bit.ly/3wSwErrScrew Gauge Explained and PYQs - https://youtu.be/gYd2PtmZ0mw😍 Download Printable Format BEST Short Notes -... Vernier calipers are among a variation of 3 products that serve the same purpose. Vernier Calipers, Dial Calipers and Digital Calipers all take a reading of a distance measured with a high level of accuracy and precision. The only real difference is the method in which the reading is taken.Metric vernier caliper, (calliper or pachymeter) in millimeter and vernier scale resolution 0.02 mm - Reading and Interpretation Practice Simulator Metric vernier caliper in millimeter, 0.02 mm. Caliper is a linear measuring instrument with a scale and a cursor that slides on it. It is designed to take external linear measurements by contact.Mitutoyo. Range/Size: 0-150mm. $333.68. Add to Cart. Higher Precision is proud to offer a large variety of Mitutoyo Vernier Calipers that are available for online purchase. If you are having trouble trying to locate a specific Vernier Caliper, please email [email protected], call 800-469-0132, or live chat with one of our technical ...Metric vernier caliper, (calliper or pachymeter), read in millimeter and vernier scale 0.05 mm. The vernier caliper, is a measuring instrument equipped with a scale and a cursor that slides in itself. In the cursor is recorded a second scale called vernier scale or nonius. At one end of the scale there is a beak with a perpendicular face on it. Vernier caliper, A short video on how to use and read a vernier caliper. If you have further questions, please ask us on our forum at http://demos.smu.ca/index.php/forum/index, Jul 19, 2023 · The vernier scale allows for measurements with higher accuracy than what the main scale alone can provide. To read a Vernier Caliper accurately, follow these steps: Step 1: Familiarise Yourself with the Vernier Caliper. • Take a moment to examine the different parts of the Vernier Caliper. This includes the main scale (8), the vernier scale ... , Vernier, dial, and digital calipers give direct and accurate readings and are functionally identical, having a calibrated scale with a fixed jaw, and another jaw with a movable pointer that slides along the scale. The vernier caliper has a scale sliding parallel to the main scale for an additional, fractional reading to improve measurement ..., Picture this: Your boss stops by your desk and casually lists a half-dozen things they'd like you to do. They then vanish before you have time to ask them clarifying questions abou..., In this video we will learn how a Vernier Caliper works, the main parts, and functions of different parts of a Vernier Caliper. We will learn about the zero ..., Summer squash and winter squash are related, but learn the key ways they differ and discover nine innovative recipes to try. If you’re looking to squash rumors about winter and sum..., 5 Ways Vernier Calipers Can Be Used in Everyday Life. A Vernier caliper is a precision measuring tool consisting of two jaws for precise measurements of length, width, and depth. Vernier calipers are a versatile tool that can be used for a variety of tasks, from measuring the internal diameter of a hole to the thickness of a piece of paper., News. April 11, 2024. Mitutoyo America Corporation is pleased to announce the release of My.Mitutoyo 3.0, our latest update with several improvements for users., A Vernier caliper is a precise measuring instrument used for measuring the distance between two opposite sides of an object. It is typically used in industrial, mechanical, and engineering applications where accuracy and precision are critical., While manufacturing or checking the dimensions of the by-product in order to ensure the desired standards are met, uses of vernier calipers come in highly recommended. It is used to measure the width and even the height of various objects. It helps in measuring holes, the width of pipes, the circumference of metal beads, etc., Beli Vernier Caliper terbaik harga murah Mei 2024 terbaru di Tokopedia! ∙ Promo Pengguna Baru ∙ Kurir Instan ∙ Bebas Ongkir ∙ Cicilan 0%., AccuMASTER Digital Vernier Caliper Stainless Steel 6 in. Tool Displays Fractions to 1/64 in Decimal Inches, Millimeters. Add to Cart. Compare $ 20. 97 (9) Model# 725H. Husky. 6 in. Vernier Caliper. Add to Cart. Compare. 0/0. Related Searches. vernier caliper. digital caliper. digital micrometer. steel calipers., Home / · Measuring & Inspecting / · Dimensional Measuring Tools / · Calipers & Caliper Gages / · Calipers / · Vernier Calipers / ·..., How To Use Vernier Caliper Hindi || How To Read Vernier Caliper || Vernier Caliper Kaise Chalaye🔵 boat Bluetooth Earphones https://amzn.to/3nJmNRo🔴 Del..., The vernier scale has finer divisions; in a standard basic vernier like in Fig 2., 10 divisions of the vernier scale correspond to 9 divisions of the main. The vernier divisions are marked 0 through 9 and then 0 again. This means that the divisions on the vernier are separated by 0.9mm. This pair of vernier calipers has an accuracy of 0.1mm., Introduction to Vernier Calipers and Description (Animation) Part 1 | By E-Kidzy TVVernier Callipers principle and description (Introduction)#VernierCalipers, Vernier calipers are classified based on an international standard IS 3651-1974, according to this standard three types of vernier calipers have been specified to meet external and internal measurement requirements of up to 2000mm with the accuracy of 0.02, 0.05, and 0.1 mm. Types of vernier caliper are termed as type A, type B, and type C. Type A, Do you know your dovetails from your calipers, your band saws from your drill bits and your sawdust from your wood grains? Well, then you shouldn't have to much trouble with the re..., Jan 27, 2006 · A vernier caliper (or vernier) is a common tool used in laboratories and industries to accurately determine the fraction part of the least count division. The vernier is a convenient tool to use when measuring the length of an object, the outer diameter (OD) of a round or cylindrical object, the inner diameter (ID) of a pipe, and the depth of a ... , 2. Knife Edge Vernier Caliper: ( Types of Vernier Caliper ) Knife edge Vernier caliper are the Vernier which have the edges like a knife. This Vernier caliper is mainly used at places where there are narrow spaces, distance of holes of I bolt etc. Its importance is due to the thin edge of its jaw which wears out quickly and starts giving an ..., Email; เวอร์เนียคาลิปเปอร์ (Vernier Caliper) เป็นเครื่องมือวัดชิ้นงานละเอียดแบบมีสเกลและสามารถเลื่อนได้ที่นิยมนำมาใช้งานกันอย่างแพร่หลายในงานด้าน ..., When your employees internalize your brand and go on to spread its message it can be very powerful. Here are 15 employee branding examples to try. People who work daily with the co..., Bob and Sparky explain how to read metric vernier calipers. You can get some practice sheets at http://weldnotes.com#Vernier #WeldNotes, Electronic Digital Caliper, Plastic Vernier Caliper, Caliper Measuring Tool with Inch/Millimeter Conversion, Extra Large LCD Screen, 0-6 Inch/0-150 mm, Auto Off Featured Micrometer Ruler. 4.4 out of 5 stars. 1,739. 200+ bought in past month. $10.99 $ 10. 99., Mitutoyo Vernier Calipers with Nib Style Jaws and Fine Adjustment Dual Scale – Metric/Metric. Mitutoyo. Range: 0-300mm. $524.60. Add to Cart. Mitutoyo Vernier Calipers with Nib Style Jaws – Metric. Mitutoyo. Range/Size: 0-450mm. $555.56., Brown & Sharpe. Indicator Repair Service specializes in REPAIR services, not replacement, for a wide variety of dimensional instrumentation. We professionaly clean, replace parts, …, News. April 11, 2024. Mitutoyo America Corporation is pleased to announce the release of My.Mitutoyo 3.0, our latest update with several improvements for users., ปากวัดนอก (Outside Caliper Jaws) ทำหน้าที่ วัดขนาดภายนอกของชิ้นงาน 2. เขี้ยววัดใน (Inside Caliper Jaws) ทำหน้าที่ วัดขนาดภายในของชิ้นงาน, Aug 22, 2007 · Spurtar Vernier Caliper, 6" Stainless Steel Non Digital Calipers, 0-6Inch/0-150mm Manual Micrometer Caliper Measuring Tool, 0.001"/0.02mm High Precision Durable Slide Caliper 4.4 out of 5 stars 6,800 , Beli Vernier Caliper terbaik harga murah Mei 2024 terbaru di Tokopedia! ∙ Promo Pengguna Baru ∙ Kurir Instan ∙ Bebas Ongkir ∙ Cicilan 0%., Kynup Caliper Measuring Tool, Digital Micrometer Caliper Tool, Vernier Caliper with Stainless Steel, Large LCD Screen, Auto - Off Feature, Inch Metric Fraction Conversion …, Jul 3, 2023 ... I show how to read a Vernier scale, using the internal jaws, external jaws, and depth rod., ปากวัดนอก (Outside Caliper Jaws) ทำหน้าที่ วัดขนาดภายนอกของชิ้นงาน 2. เขี้ยววัดใน (Inside Caliper Jaws) ทำหน้าที่ วัดขนาดภายในของชิ้นงาน