{"id":7874,"date":"2017-07-27T10:45:50","date_gmt":"2017-07-27T08:45:50","guid":{"rendered":"https:\/\/blog.wika.com\/en\/?p=7874"},"modified":"2021-12-01T10:13:04","modified_gmt":"2021-12-01T09:13:04","slug":"advantages-of-diaphragm-pressure-gauges-2-high-overload-protection","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/","title":{"rendered":"Advantages of diaphragm pressure gauges (2): High overload protection"},"content":{"rendered":"<p><strong>Overload can quickly expose the limit of any pressure measuring instrument. Diaphragm pressure gauges withstand a significantly higher maximum pressure when compared to instruments with Bourdon tubes. This protection is due to their physical design.<\/strong><\/p>\n\n      <div class=\"wp-caption alignright\" style=\"max-width:396px;\"><img decoding=\"async\" src=\"https:\/\/blog.wika.com\/en\/files\/2017\/05\/plattenfeder_illu_2002-388x471.jpg\" \/><p class=\"wp-caption-text\">The high overload safety results from the support of the diaphragm (1) on the upper flange and its contour from flattened waves. With measuring ranges in the mbar range, the protection is increased through a specially machined diaphragm bed, against which the diaphragm rests completely (2).<\/p><\/div>\n    \n<p>A cross-section of the measuring cell illustrates the reason for the pronounced overload safety of a diaphragm pressure gauge: Its diaphragm can be supported against the upper flange. Furthermore, since the diaphragm features a contour with flattened waves, the protection factor is further increased because of the greater contact area. Diaphragm pressure gauges from WIKA have a standard overload safety of five times the full scale value \u2212 with Bourdon tube pressure gauges, this is only around 1.3 times as standard.<\/p>\n<h2>No deformation<\/h2>\n<p>The overload safety of diaphragm element instruments can still be increased up to one thousand times. Up to 400 bar is possible, even with a measuring range of 0 \u2026 16 mbar. In this case, the upper flange has a specially machined, metallic diaphragm bed, against which the diaphragm element rests, should the full scale value be exceeded. Through this full-surface contact, any plastic deformation is excluded and the long-term stability is increased. For mbar measuring ranges, from the same resistant-to-deformation approach, safety against underpressure is also possible. Diaphragm elements are generally not flat. Only a contour with concentric waves enables a diaphragm travel (necessary for mechanical measurement) of one to three millimetres in length, alongside good linearity.<\/p>\n<p><strong>Note<br \/>\n<\/strong>You can find further information on diaphragm pressure gauges on the WIKA website under the headings <a href=\"https:\/\/www.wika.com\/en-en\/pressure_gauges.WIKA\" rel=\"external\" target=\"_blank\">Pressure gauges<\/a>, <a href=\"https:\/\/www.wika.com\/en-en\/pressure_gauges_with_output_signal.WIKA\" rel=\"external\" target=\"_blank\">Pressure gauges with output signal <\/a>and <a href=\"https:\/\/www.wika.com\/en-en\/contact_pressure_gauges.WIKA\" rel=\"external\" target=\"_blank\">Contact pressure gauges<\/a>.<\/p>\n<p><strong>See also our article<br \/>\n<\/strong><a href=\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-measurement-of-low-pressures\/\">Advantages of diaphragm pressure gauges (1): Measurement of low pressures<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overload can quickly expose the limit of any pressure measuring instrument. Diaphragm pressure gauges withstand a significantly higher maximum pressure when compared to instruments with Bourdon tubes. This protection is due to their physical design. A cross-section of the measuring cell illustrates the reason for the pronounced overload safety of a diaphragm pressure gauge: Its [&hellip;]<\/p>\n","protected":false},"author":115,"featured_media":7877,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5],"tags":[75],"class_list":["post-7874","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowhow","tag-pressure-gauge"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Advantages of diaphragm pressure gauges (2) - WIKA blog<\/title>\n<meta name=\"description\" content=\"Advantages of diaphragm pressure gauges: High overload protection. No deformation and withstand a significantly higher maximum pressure.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Advantages of diaphragm pressure gauges (2) - WIKA blog\" \/>\n<meta property=\"og:description\" content=\"Advantages of diaphragm pressure gauges: High overload protection. No deformation and withstand a significantly higher maximum pressure.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/\" \/>\n<meta property=\"og:site_name\" content=\"WIKA blog\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.wika.com\/en\/files\/2017\/05\/champagnerkorken.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"838\" \/>\n\t<meta property=\"og:image:height\" content=\"471\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Silvia Weber\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Silvia Weber\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/\"},\"author\":{\"name\":\"Silvia Weber\",\"@id\":\"https:\/\/blog.wika.com\/en\/#\/schema\/person\/15d6c929ebbeb94dbedd482d363c942d\"},\"headline\":\"Advantages of diaphragm pressure gauges (2): High overload protection\",\"datePublished\":\"2017-07-27T08:45:50+00:00\",\"dateModified\":\"2021-12-01T09:13:04+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/\"},\"wordCount\":330,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blog.wika.com\/en\/files\/2017\/05\/champagnerkorken.jpg\",\"keywords\":[\"Pressure gauge\"],\"articleSection\":[\"Know-how\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/\",\"url\":\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/\",\"name\":\"Advantages of diaphragm pressure gauges (2) - WIKA blog\",\"isPartOf\":{\"@id\":\"https:\/\/blog.wika.com\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blog.wika.com\/en\/knowhow\/advantages-of-diaphragm-pressure-gauges-2-high-overload-protection\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blog.wika.com\/en\/files\/2017\/05\/champagnerkorken.jpg\",\"datePublished\":\"2017-07-27T08:45:50+00:00\",\"dateModified\":\"2021-12-01T09:13:04+00:00\",\"author\":{\"@id\":\"https:\/\/blog.wika.com\/en\/#\/schema\/person\/15d6c929ebbeb94dbedd482d363c942d\"},\"description\":\"Advantages of diaphragm pressure gauges: High overload protection. 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