{"id":17691,"date":"2026-05-13T09:25:59","date_gmt":"2026-05-13T07:25:59","guid":{"rendered":"https:\/\/testnordic.se\/product\/mru-120hd-2\/"},"modified":"2026-05-13T09:25:59","modified_gmt":"2026-05-13T07:25:59","slug":"mru-120hd-2","status":"publish","type":"product","link":"https:\/\/testnordic.se\/en\/product\/mru-120hd-2\/","title":{"rendered":"MRU-120HD"},"content":{"rendered":"<h2 data-section-id=\"8o949t\" data-start=\"727\" data-end=\"791\">MRU-120HD \u2013 advanced earth resistance tester for demanding measurement environments<\/h2>\n<p data-start=\"793\" data-end=\"1070\">MRU-120HD is a robust and advanced earth resistance tester developed for accurate measurement of earth resistance and soil resistivity in power utility, industrial and service applications. The instrument is designed for demanding environments where high reliability and stable measurement performance are required. <\/p>\n<p data-start=\"1072\" data-end=\"1325\">MRU-120HD is a robust and advanced earth resistance tester developed for accurate measurement of earth resistance and soil resistivity in power utility, industrial and service applications. The instrument is designed for demanding environments where high reliability and stable measurement performance are required. <\/p>\n<p data-start=\"1327\" data-end=\"1597\">MRU-120HD can also be used for soil resistivity measurements according to the Wenner method and for testing protective and equipotential bonding conductors according to EN 61557 standards. The high test current above 200 mA provides stable and reliable results even in environments with electrical interference. <\/p>\n<p data-start=\"1599\" data-end=\"1819\">The robust sealed housing is designed for outdoor work and demanding installations. The instrument offers high resistance to dust, water and mechanical impact, making it suitable for field work within the energy sector. <\/p>\n<h2 data-section-id=\"beb3bz\" data-start=\"1826\" data-end=\"1855\">Why choose MRU-120HD<\/h2>\n<ul data-start=\"1857\" data-end=\"2138\">\n<li data-section-id=\"1oajudk\" data-start=\"1857\" data-end=\"1916\">Advanced measurement of earth resistance and soil resistivity<\/li>\n<li data-section-id=\"39c10k\" data-start=\"1917\" data-end=\"1965\">Support for 3-pole, 4-pole and clamp-based measurements<\/li>\n<li data-section-id=\"1hh23ft\" data-start=\"1966\" data-end=\"2029\">Possibility to perform measurements without disconnecting grounding systems<\/li>\n<li data-section-id=\"1r8s048\" data-start=\"2030\" data-end=\"2084\">High measurement accuracy even in environments with electrical interference<\/li>\n<li data-section-id=\"1m9bzn6\" data-start=\"2085\" data-end=\"2138\">Rugged construction for professional field work<\/li>\n<\/ul>\n<h2 data-section-id=\"h6kk0k\" data-start=\"2145\" data-end=\"2170\">Technical summary<\/h2>\n<ul data-start=\"2172\" data-end=\"2582\">\n<li data-section-id=\"1ve0dwg\" data-start=\"2172\" data-end=\"2211\">3-pole and 4-pole earth resistance measurement<\/li>\n<li data-section-id=\"1pzh08s\" data-start=\"2212\" data-end=\"2245\">Two-clamp and clamp measurement methods<\/li>\n<li data-section-id=\"151ptih\" data-start=\"2246\" data-end=\"2299\">Soil resistivity measurement according to the Wenner method<\/li>\n<li data-section-id=\"etn31p\" data-start=\"2300\" data-end=\"2335\">Earth resistance: 0.30 \u03a9 \u2013 19.9 k\u03a9<\/li>\n<li data-section-id=\"1ilc080\" data-start=\"2336\" data-end=\"2374\">Soil resistivity: up to 999 k\u03a9m<\/li>\n<li data-section-id=\"m1dofm\" data-start=\"2375\" data-end=\"2399\">Test current above 200 mA<\/li>\n<li data-section-id=\"1jj6byr\" data-start=\"2400\" data-end=\"2453\">Testing of protective and equipotential bonding conductors<\/li>\n<li data-section-id=\"w6dzdk\" data-start=\"2454\" data-end=\"2498\">Memory storage for up to 990 measurements<\/li>\n<li data-section-id=\"1r5jhbn\" data-start=\"2499\" data-end=\"2533\">IP67-rated sealed housing<\/li>\n<li data-section-id=\"b495nh\" data-start=\"2534\" data-end=\"2582\">Designed for industry, power utilities and substations<\/li>\n<\/ul>\n<div class=\"entry-content-asset videofit\"><iframe title=\"Unboxing Sonel MRU-120HD\" width=\"720\" height=\"405\" src=\"https:\/\/www.youtube.com\/embed\/cRKu8WFCDOY?start=3&#038;feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<h6><\/h6>\n<h6>Datasheet<\/h6>\n<div class='w3eden'><!-- WPDM Link Template: Default Template -->\n\n<div class=\"link-template-default card mb-2\">\n    <div class=\"card-body\">\n        <div class=\"media\">\n            <div class=\"mr-3 img-48\"><img decoding=\"async\" class=\"wpdm_icon\" alt=\"Icon\" src=\"https:\/\/testnordic.se\/wp-content\/plugins\/download-manager\/assets\/file-type-icons\/pdf.svg\" \/><\/div>\n            <div class=\"media-body\">\n                <h3 class=\"package-title\"><a href='https:\/\/testnordic.se\/en\/download\/rmu-120hd\/'>RMU-120HD<\/a><\/h3>\n                <div class=\"text-muted text-small\"><i class=\"fas fa-copy\"><\/i> 1 file(s) <i class=\"fas fa-hdd ml-3\"><\/i> 1.10 MB<\/div>\n            <\/div>\n            <div class=\"ml-3\">\n                <a class='wpdm-download-link download-on-click btn btn-primary ' rel='nofollow' href='#' data-downloadurl=\"https:\/\/testnordic.se\/en\/download\/rmu-120hd\/?wpdmdl=17687&refresh=6a732f9dc73601785933725\">Download<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<h6>MRU-120HD is an advanced earth resistance tester for measuring earth resistance, soil resistivity and protective conductors. The instrument supports 3-pole and 4-pole measurements, clamp measurements and the Wenner method, and is developed for demanding environments within the power utility and industrial sectors. <\/h6>\n<p><img decoding=\"async\" class=\"alignnone size-medium wp-image-13131\" src=\"https:\/\/testnordic.se\/wp-content\/uploads\/2025\/08\/sonel_logo-300x141.jpg\" alt=\"\" width=\"300\" height=\"141\" srcset=\"https:\/\/testnordic.se\/wp-content\/uploads\/2025\/08\/sonel_logo-300x141.jpg 300w, https:\/\/testnordic.se\/wp-content\/uploads\/2025\/08\/sonel_logo-64x30.jpg 64w, https:\/\/testnordic.se\/wp-content\/uploads\/2025\/08\/sonel_logo.jpg 578w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n","protected":false},"featured_media":17751,"template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":""},"product_brand":[],"product_cat":[315],"product_tag":[],"yst_prominent_words":[],"class_list":{"0":"post-17691","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-earthing-resistance-and-soil-resistivity-meters-en","8":"first","9":"instock","10":"taxable","11":"shipping-taxable","12":"product-type-simple","13":"entry","14":"content-bg","15":"loop-entry"},"_links":{"self":[{"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product\/17691","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":0,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product\/17691\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/media\/17751"}],"wp:attachment":[{"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/media?parent=17691"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product_brand?post=17691"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product_cat?post=17691"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/product_tag?post=17691"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/testnordic.se\/en\/wp-json\/wp\/v2\/yst_prominent_words?post=17691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}