{"id":201,"date":"2026-09-04T13:25:04","date_gmt":"2026-09-04T13:25:04","guid":{"rendered":"https:\/\/bmb-lab.hr\/?p=201"},"modified":"2026-09-04T13:25:04","modified_gmt":"2026-09-04T13:25:04","slug":"vodic-kako-odabrati-odgovarajuci-manometar","status":"publish","type":"post","link":"https:\/\/bmb-lab.hr\/?p=201","title":{"rendered":"Vodi\u010d: Kako odabrati odgovaraju\u0107i manometar?"},"content":{"rendered":"\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Vodi\u010d: Kako odabrati odgovaraju\u0107i manometar?<br><strong>Manometar<\/strong> je mjerni instrument koji slu\u017ei za mjerenje i prikaz tlaka medija, naj\u010de\u0161\u0107e plinova i teku\u0107ina. Ovisno o izvedbi, manometri mogu mjeriti <strong>relativni, apsolutni ili diferencijalni tlak<\/strong>, kao i vakuum.<br>Naj\u010de\u0161\u0107a izvedba u industriji je <strong>manometar s Bourdonovom cijevi<\/strong>, koji pokriva velik dio uobi\u010dajenih primjena. Za zahtjevnije uvjete, primjerice agresivne medije, visoke temperature ili posebne procesne uvjete, koriste se druge izvedbe, poput <strong>membranskih manometara ili manometara s prijenosnikom tlaka<\/strong>.<br>\u0160to je va\u017eno znati pri odabiru manometra?<br>Kako bi se odabrao odgovaraju\u0107i manometar, potrebno je definirati nekoliko osnovnih parametara:<br><strong>\u0160to mjerimo? \u2013 medij<\/strong><br>Potrebno je znati je li rije\u010d o vodi, zraku, ulju, plinu, agresivnom mediju, pari ili drugom mediju. Bitno je da materijal u dodiru s medijem odgovara primjeni.<br><strong>Koji tlak mjerimo?<\/strong><br>Treba definirati radi li se o <strong>pozitivnom tlaku, vakuumu, apsolutnom ili diferencijalnom tlaku<\/strong>.<br><strong>Mjerni raspon<\/strong><br>Potrebno je odrediti minimalni i maksimalni tlak koji \u0107e se mjeriti, te ostaviti prostora da na\u0161 instrument ne mjeri tlak na gornjoj granici mjernog podru\u010dja.<br><strong>To\u010dnost \/ klasa to\u010dnosti<\/strong><br>Klasa to\u010dnosti pokazuje dopu\u0161teno odstupanje pokazivanja, izra\u017eeno kao postotak punog mjernog raspona. Primjerice, kod manometra <strong>0\u2013100 bar, klase to\u010dnosti 1,0<\/strong>, dopu\u0161teno odstupanje iznosi <strong>\u00b11 bar<\/strong>.<br><strong>Materijal manometra<\/strong><br>Za uobi\u010dajene i nekorozivne medije mogu biti dovoljni manometri s mjernim sustavom od bakrenih legura. Za agresivne medije ili zahtjevnije uvjete preporu\u010duju se <strong>nehr\u0111aju\u0107i \u010delik<\/strong> ili posebni materijali poput PTFE-a, Hastelloya i sl.<br><strong>Uvjeti rada<\/strong><br>Va\u017eno je znati postoje li <strong>vibracije, pulsacije tlaka, udari tlaka, visoka temperatura ili agresivna atmosfera<\/strong>. Kod vibracija i pulsacija \u010desto se koristi manometar s <strong>punjenjem glicerinom<\/strong>, koje prigu\u0161uje vibracije i olak\u0161ava o\u010ditavanje.<br><strong>Priklju\u010dak<\/strong><br>Potrebno je definirati <strong>vrstu i veli\u010dinu priklju\u010dka<\/strong> (npr. G 1\/4, G 1\/2, 1\/4 NPT) te njegov polo\u017eaj \u2013 donji &#8211; radijal, stra\u017enji-aksijal i sl.<br><strong>Veli\u010dina ku\u0107i\u0161ta<\/strong><br>Ovisno o prostoru i potrebnoj \u010ditljivosti, biraju se razli\u010diti promjeri ku\u0107i\u0161ta, primjerice <strong>\u00d8 63, 100 ili 160 mm<\/strong>.<\/summary>\n<div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"410\" height=\"410\" src=\"https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/232.50_233.50_en_co_rs_w410_h410_image.jpg\" alt=\"\" class=\"wp-image-181 size-full\" srcset=\"https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/232.50_233.50_en_co_rs_w410_h410_image.jpg 410w, https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/232.50_233.50_en_co_rs_w410_h410_image-300x300.jpg 300w, https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/232.50_233.50_en_co_rs_w410_h410_image-150x150.jpg 150w, https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/232.50_233.50_en_co_rs_w410_h410_image-53x53.jpg 53w\" sizes=\"auto, (max-width: 410px) 100vw, 410px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p><\/p>\n<\/div><\/div>\n<\/details>\n<\/div><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"410\" height=\"410\" src=\"https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/cpg1500_en_co_rs_w410_h410_image.jpg\" alt=\"\" class=\"wp-image-185\" srcset=\"https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/cpg1500_en_co_rs_w410_h410_image.jpg 410w, https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/cpg1500_en_co_rs_w410_h410_image-300x300.jpg 300w, https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/cpg1500_en_co_rs_w410_h410_image-150x150.jpg 150w, https:\/\/bmb-lab.hr\/wp-content\/uploads\/2026\/09\/cpg1500_en_co_rs_w410_h410_image-53x53.jpg 53w\" sizes=\"auto, (max-width: 410px) 100vw, 410px\" \/><figcaption class=\"wp-element-caption\">Digitalni manometar WIKA &#8211; model CPG1500<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-201","post","type-post","status-publish","format-standard","hentry","category-proizvodi"],"_links":{"self":[{"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=\/wp\/v2\/posts\/201","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=201"}],"version-history":[{"count":1,"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=\/wp\/v2\/posts\/201\/revisions"}],"predecessor-version":[{"id":202,"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=\/wp\/v2\/posts\/201\/revisions\/202"}],"wp:attachment":[{"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bmb-lab.hr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}