{"id":8209,"date":"2014-12-12T15:01:40","date_gmt":"2014-12-12T20:01:40","guid":{"rendered":"http:\/\/blog.wika.com\/us\/\/?p=997"},"modified":"2024-06-10T12:36:18","modified_gmt":"2024-06-10T17:36:18","slug":"choose-optimum-pressure-range-pressure-sensors","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/us\/products\/pressure-products\/choose-optimum-pressure-range-pressure-sensors\/","title":{"rendered":"Choosing the Optimal Pressure Range for Pressure Sensors"},"content":{"rendered":"<p><strong>When choosing a pressure sensor, one of the many factors to consider is its measuring range. Having the optimal range avoids the risk of overpressure\u00a0without a loss of accuracy or resolution.\u00a0<\/strong><\/p>\n<p>Pressure sensors play a key role in the safety and efficiency of countless applications, from <a href=\"https:\/\/www.wika.com\/en-us\/hydraulic_power_packs.WIKA\" rel=\"external\" target=\"_blank\">hydraulics<\/a> and <a href=\"https:\/\/www.wika.com\/en-us\/water_jet_cutting.WIKA\" rel=\"external\" target=\"_blank\">waterjet cutting<\/a> to <a href=\"https:\/\/blog.wika.com\/us\/\/products\/level-products\/accuracy-pressure-sensors-fluid-level-monitoring\/\">hydrostatic level measurement<\/a>. When deciding which sensor and configuration are right for a particular application, users should consider the following:<\/p>\n<ul>\n<li><a href=\"https:\/\/blog.wika.com\/us\/\/knowhow\/pressure-sensor-accuracy-3-errors\/\">Accuracy<\/a><\/li>\n<li><a href=\"https:\/\/blog.wika.com\/us\/\/knowhow\/nema-rating-and-ip-rating-explaining-the-difference\/\">IP or NEMA rating<\/a> (to prevent <a href=\"https:\/\/blog.wika.com\/us\/\/knowhow\/pressure-sensor-failure-due-water-moisture\/\">moisture-related damage<\/a>)<\/li>\n<li>Cost per unit<\/li>\n<li>Measuring range<\/li>\n<\/ul>\n<h2>The Importance of Pressure Sensor Measuring Range<\/h2>\n<p>There is a sweet spot when it comes to arriving at the optimum measuring range for pressure sensors.\u00a0If the upper range is not high enough to account for overpressure, there is the risk of overloading the sensing element and damaging it. The result would be <a href=\"https:\/\/blog.wika.com\/us\/\/knowhow\/understanding-pressure-sensor-failure-reliability\/\">pressure sensor failure.<\/a><\/p>\n<p>But if the measuring range is much too wide, the result could be compromised accuracy or a too-low output signal.<\/p>\n<h2>What to Know about Pressure Range for Pressure Sensors<\/h2>\n\n      <div class=\"wp-caption alignright\" style=\"max-width:396px;\"><a href=\"https:\/\/blog.wika.com\/us\/\/files\/2014\/12\/a-10-data-sheet_measuring-range.png\"><img decoding=\"async\" src=\"https:\/\/blog.wika.com\/us\/\/files\/2014\/12\/a-10-data-sheet_measuring-range-388x303.png\" \/><\/a><p class=\"wp-caption-text\">Data sheet for the A-10 pressure transmitter, with details on the measuring range (click to enlarge)<\/p><\/div>\n    \n<p>Some manufacturers\u2019 data sheets for pressure sensors list three different values regarding the pressure range: maximum operating\/working pressure, overpressure limit, safe operating pressure, burst pressure, etc. (Note: Different manufacturers may use slightly different terms.) However, the only ones that really matters are the maximum operating\/working pressure, sometimes called the rated operating pressure, and the overpressure limit. If those are\u00a0exceeded, the accuracy specifications listed in the data sheet are no longer guaranteed.<\/p>\n<p>WIKA\u2019s data sheets for pressure sensors, like the <a href=\"https:\/\/www.wika.com\/en-us\/a_10.WIKA?highlightedText=A-10\" rel=\"external\" target=\"_blank\">A-10 pressure transmitter<\/a> and <a href=\"https:\/\/www.wika.com\/en-us\/s_20.WIKA?highlightedText=S-20\" rel=\"external\" target=\"_blank\">S-20 superior pressure transmitter<\/a>, list these two key measuring ranges:<\/p>\n<div class=\"page\" title=\"Page 4\">\n<div class=\"section\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<ul>\n<li><span><strong>Maximum\u00a0operating\/working range<\/strong>, which corresponds to the upper measuring range value \/ measuring range full scale value.<\/span><\/li>\n<li><strong>Overpressure limit<\/strong>, which is based on the\u00a0<span>measuring range. This limit varies\u00a0depending on the selected process connection and sealing.<\/span><\/li>\n<\/ul>\n<h2>The Measuring Range and Its Effect on Accuracy<\/h2>\n<p><span style=\"font-size: 1rem\">What happens if you select a too-wide range, such as if your application goes up to just 250 psi but the pressure sensor has a measuring range of 0 &#8230; 1,000 psi? In most cases, a too-high upper range is not too serious. This is because most of the <\/span><a style=\"font-size: 1rem\" href=\"https:\/\/blog.wika.com\/us\/\/knowhow\/pressure-transmitter-accuracy-and-non-linearity\/\">accuracy parameters<\/a><span style=\"font-size: 1rem\"> \u2013 linearity, repeatability, hysteresis, etc. \u2013 are in relation to the actual reading or value, not to the full scale. In data sheets,\u00a0their maximum value is defined and expressed as a percentage of the rated pressure range. The error in service actually \u201cscales down\u201d with usage.<\/span><\/div>\n<div>\u00a0<\/div>\n<div class=\"column\">\n<h3>Non-linearity error with relation to measuring range<\/h3>\n<p>For example, if the non-linearity is defined as \u2264 \u00b10.1% of span, it means that a 0 &#8230; 1,000 psi pressure sensor can experience a maximum of 1 psi deviation from the ideal line; this is expected to happen around the mid-point of the range \u2013 500 psi in this case. But when you measure only 250 psi with the same transmitter, the linearity is expected to deviate not by 1 psi, but by only a fraction of that. In fact, if you use a 0 &#8230; 1,000 psi sensor to measure just pressures from 0 to 500 psi, the expected <a href=\"https:\/\/blog.wika.com\/us\/\/knowhow\/pressure-sensor-accuracy-3-errors\/\">non-linearity error<\/a> between 0 and 500 psi is about 0.25 psi, and is expected to peak somewhere around 250 psi.<\/p>\n<h3>Zero-point error with relation to measuring range<\/h3>\n<p>The only errors that do not scale down are those related to the zero point of the sensors: 1) zero point accuracy\/calibration \u00a0and 2) temperature effect on zero (TC zero, or temperature coefficient on zero). In the data sheet, both are defined as a percentage of full scale, and their absolute value remains constant for the individual sensor \u2013 independent of how much of the range is used.<\/p>\n<p>In our example of the 0 &#8230; 1,000 psi pressure sensor, let\u2019s assume a \u00b10.5% error on zero = 5 psi. Whether you measure 1,000 psi or 500 psi or 10 psi, you can expect an offset in zero of up to 5 psi in a specific sensor. The practical implication is that there\u2019s very little offset, as most sensors are \u201czeroed\u201d when hooked up to a meter or <span>programmable logic\u00a0control (PLC)\u00a0<\/span>during installation.<\/p>\n<h3>Signal resolution with relation to measuring range<\/h3>\n<p>The only other limitation to be aware of is the resolution of the receiving electronics, such as the PLC\u2019s analog input card or the input of the meter or display. In most cases, this is no longer a problem as they typically provide a resolution of 12 bit and beyond.<\/p>\n<p>Let\u2019s consider again the example of using a 0 &#8230; 1,000 psi sensor for a 0 &#8230; 250 psi application. In this case, the user would still get a 10-bit resolution (in the case of a 12-bit A\/D) providing 0.1% resolution from 0 to 250 psi (= 0.25 psi).<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2>WIKA USA, Your Partner in Pressure Sensing<\/h2>\n<div class=\"column\">One of the reasons that WIKA\u2019s <a href=\"https:\/\/www.wika.com\/en-us\/pressure_sensors.WIKA\" rel=\"external\" target=\"_blank\">pressure sensors<\/a> are so popular is because they come in many measuring ranges for <a href=\"https:\/\/blog.wika.com\/us\/\/knowhow\/what-is-gauge-pressure\/\">gauge pressure<\/a>, <a href=\"https:\/\/blog.wika.com\/us\/\/products\/pressure-products\/absolute-pressure-sensors-use-functionality\/\">absolute pressure<\/a>, and vacuum. This is in addition to the wide choice of process connections, electrical connections, output signals, materials, and approvals.<\/div>\n<div>\u00a0<\/div>\n<div>In general, when it comes to choosing the optimal measuring range for a pressure sensor, overpressure is a greater concern than a possible loss in accuracy or resolution. So, it\u2019s better to opt for a higher upper limit than a narrower overall range. For expert advice for selecting the correct sensor configuration for your application, contact the friendly product specialists at WIKA USA.<\/div>\n<div>\u00a0<\/div>\n<div><strong>Products\u00a0mentioned in this article:<\/strong><\/div>\n<div>\u2022 \u00a0<a href=\"https:\/\/www.wika.com\/en-us\/a_10.WIKA?highlightedText=A-10\" rel=\"external\" target=\"_blank\">A-10 pressure transmitter<\/a><strong><br \/>\n<\/strong>\u2022 \u00a0<a href=\"https:\/\/www.wika.com\/en-us\/s_20.WIKA?highlightedText=S-20\" rel=\"external\" target=\"_blank\">S-20 superior pressure transmitter<\/a><strong><br \/>\n<\/strong><\/div>\n<div>\u00a0<\/div>\n<div>\u00a0<\/div>\n<div>\n<p><span>[contact-form-7 id=&#8221;14552&#8243; title=&#8221;Blog Contact Form&#8221;]<\/span><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>When choosing a pressure sensor, one of the many factors to consider is its measuring range. Having the optimal range avoids the risk of overpressure\u00a0without a loss of accuracy or resolution.\u00a0 Pressure sensors play a key role in the safety and efficiency of countless applications, from hydraulics and waterjet cutting to hydrostatic level measurement. When [&hellip;]<\/p>\n","protected":false},"author":192,"featured_media":17909,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,220],"tags":[15,77],"class_list":["post-8209","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowhow","category-pressure-products","tag-accuracy","tag-pressure-sensor"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The Optimal Pressure Range for Pressure Sensors - WIKA blog<\/title>\n<meta name=\"description\" content=\"When choosing a pressure sensor, one factor to consider is its measuring range to avoid overpressure\u00a0without a loss of accuracy or resolution.\" \/>\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\/us\/products\/pressure-products\/choose-optimum-pressure-range-pressure-sensors\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Optimal Pressure Range for Pressure Sensors - 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