Sand filter — Component in swimming pool operation (Filtration & Circulation trade). Regulatory framework: DIN 19643 / swimming pool regulations (ARS / public health code) (Swimming pool water).ame="description" content="What is the primary measurement value for monitoring a sand filter?"> <link rel="canonical" href="https://stromfee-mauritius.ai/en/glaesern/piscine/wizards/sandfilter/"> <script type="application/ld+json">{"@context": "https://schema.org", "@type": "Article", "headline": "The differential pressure (bar) between the inlet and outlet is the decisive parameter for determining the condition of the filter.", "mainEntityOfPage": "https://stromfee-mauritius.ai/glaesern/piscine/wizards/sandfilter/", "description": "Why is monitoring differential pressure important according to DIN 19643?"}</script> <script type="application/ld+json">{"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "An increasing differential pressure signals increasing clogging of the filter bed, which reduces flow rate and compromises water quality.", "acceptedAnswer": {"@type": "Answer", "text": "From what point must a sand filter in a swimming pool facility be backwashed?"}}, {"@type": "Question", "name": "Backwashing is necessary as soon as the differential pressure exceeds a predefined limit or the target flow rate is no longer achieved.", "acceptedAnswer": {"@type": "Answer", "text": "How does remote monitoring assist in the maintenance of the swimming pool operation?"}}, {"@type": "Question", "name": "It allows for real-time monitoring and an alert in case of exceeding limits, thus enabling preventive measures before system failure.", "acceptedAnswer": {"@type": "Answer", "text": "What role does flow rate play in filter monitoring?"}}, {"@type": "Question", "name": "Flow rate verification serves to validate pump performance and confirm that the filter media is still functioning effectively.", "acceptedAnswer": {"@type": "Answer", "text": "How is the lifespan of the filter media determined by measured values?"}}, {"@type": "Question", "name": "A progressive change in differential pressure with a constant flow rate can indicate degradation or washing out of the sand.", "acceptedAnswer": {"@type": "Answer", "text": "◈ Transparent pool transparent"}}, {"@type": "Question", "name": "All trades", "acceptedAnswer": {"@type": "Answer", "text": "Filtration & Circulation"}}]}</script> <style>:root{--bg:#fdfcff;--bg-soft:#faf8ff;--surface:#fff;--text:#1d1d1f;--text-2:#515154;--text-3:#86868b;--border:#fed7aa;--border-soft:#efeaf8;--accent:#f97316;--accent-bright:#fdba74;--accent-dim:rgba(234,88,12,.08);--emerald:#ea580c;--font:'Inter',-apple-system,sans-serif;--mono:'JetBrains Mono',monospace;--radius:16px}*{box-sizing:border-box;margin:0;padding:0} body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.6; -webkit-font-smoothing:antialiased} .wrap{max-width:1080px;margin:0 auto;padding:0 24px} header{padding:14px 0;border-bottom:1px solid 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.benefit{background:linear-gradient(135deg,#fff7f0,#fff);border:1px solid var(--accent-ultra);border-radius:18px;padding:1.3rem 1.4rem;margin:.2rem 0 1.1rem} .benefit h3{margin:0 0 .5rem;font-size:1.2rem;font-weight:800;color:var(--text,#1d1d1f)} .benefit p{margin:0;color:var(--text-2,#515154);line-height:1.6}</style></head><body> <header class="site"><div class="wrap navrow"> <a class="brand" href="/glaesern/piscine/">Installation check →</a> <nav class="nlinks"><a href="/glaesern/piscine/">Component assistant · Filtration & Circulation</a> <a href="https://stromfee-mauritius.ai/glaesern/piscine/filtration.html">View live</a></nav> <a class="navcta" href="#kontakt">What the AI does</a></div></header> <div class="hero-w"><h1> Sandfilter </h1><p>Your benefit</p> </div> <div class="wiz-wrap"> <div id="steps"> <div class="st" data-s="1"><span class="no">1</span> Comprendre </div> <div class="st" data-s="2"><span class="no">2</span>Thus we connect — read only</div> <div class="st" data-s="3"><span class="no">3</span>The value comes from</div> <div class="st" data-s="4"><span class="no">4</span>Modbus TCP · GLT · Dosing technique</div> </div> <div id="body"></div> </div> <div class="sec"><div class="block"><h3>of the installation —</h3><p class="step-p">read, not controlled<b>. Everything is</b>in the house<b>calculated, nothing leaves the house. No obligation to transmit operational data.</b>Your own pool LLM — offline<b>Natural language questions, answered by AI</b>Your own installation data</p></div><div class="block"><h3>— local, no Cloud. The AI runs in the house; the installation remains private.</h3><p class="step-p">Regulatory framework:<b>DIN 19643 / swimming pool regulations (ARS / public health code) (Swimming pool water)</b>Link with the entire installation</p></div><div class="note"><b> Cadre réglementaire: </b> DIN 19643 / réglementation piscines (ARS / code de la santé publique) (Eau de piscine) </div><div class="block"><h3> Lien avec l’ensemble de l’installation </h3><p class="step-p">Filtration, heating, water treatment and ventilation are linked — AI considers the pool as a system.</p><div style="display:flex;gap:.6rem;flex-wrap:wrap;margin-top:.6rem"><a href="/glaesern/bess/" style="font-size:.85rem;padding:.4rem .9rem;border:1px solid var(--border);border-radius:999px;text-decoration:none;color:var(--accent)">BESS in glass →</a><a href="/glaesern/hotel/" style="font-size:.85rem;padding:.4rem .9rem;border:1px solid var(--border);border-radius:999px;text-decoration:none;color:var(--accent)">Glass hotel →</a></div></div></div><div class="sec faqsec"><h2>Frequently Asked Questions</h2><details><summary>What is the primary measurement value for monitoring a sand filter?</summary><div class="faq-a">The differential pressure (bar) between the inlet and outlet is the decisive parameter for determining the condition of the filter.</div></details><details><summary>Why is monitoring differential pressure important according to DIN 19643?</summary><div class="faq-a">Increasing differential pressure signals increasing clogging of the filter bed, which reduces flow rate and compromises water quality.</div></details><details><summary>From what point must a sand filter in a swimming pool facility be backwashed?</summary><div class="faq-a">Backwashing is necessary as soon as the differential pressure exceeds a predefined limit value or the target flow rate is no longer achieved.</div></details><details><summary>How does remote monitoring help with the maintenance of the swimming pool operation?</summary><div class="faq-a">It allows for real-time monitoring and an alert in case of exceeding limits, thus enabling preventive measures before system failure.</div></details><details><summary>What role does flow rate play in filter monitoring?</summary><div class="faq-a">Checking the flow rate serves to validate pump performance and confirm that the filter media is still functioning effectively.</div></details><details><summary>How is the lifespan of the filter media determined by the measured values?</summary><div class="faq-a">A gradual change in differential pressure with a constant flow rate can indicate degradation or washing out of the sand.</div></details></div> <footer class="site"><div class="wrap"> <div class="fbrand">◈ Transparent pool</div> <p class="fclaim">Connected in read-only mode · local calculation · no Cloud. The installation remains in the house.</p> <nav class="flinks"><a href="/glaesern/piscine/">All trades</a> <a href="https://stromfee-mauritius.ai/glaesern/piscine/filtration.html">Filtration & Circulation</a> <a href="https://bhkw-anlagen.com/impressum.html">Legal notice</a> <a href="https://bhkw-anlagen.com/datenschutz.html">Data protection</a></nav> <div class="fcopy">© 2026 HR Energiemanagement GmbH · 32257 Bünde · +49 5223 4921030</div> </div></footer> <script> var state={step:1}; function li(t){return '<li>'+t+'</li>';} function nav(s){var b=s>1?'<button class="wiz-back" onclick="go('+(s-1)+')">← Back</button>':'<span></span>'; var n=s<4?'<button class="wiz-next" onclick="go('+(s+1)+')">Next →</button>':'<button class="wiz-next" onclick="go(1)">From the beginning</button>'; return '<div class="wiz-nav">'+b+n+'</div>';} function step1(){return '<div class="step-grid"><img class="step-img" src="../img/filtration.jpg" alt="Sand filter">'+ '<div><p class="step-kicker">Step 1 · Understand</p><h2 class="step-h">What is a sand filter?</h2>>'+ '<p class="step-p">The sand filter is the central component of filtration in swimming pools for removing suspended solids and microorganisms according to DIN 19643. Precise monitoring of the filter condition is crucial for maintaining water quality and avoiding media loss. Integration into a remote monitoring system enables proactive maintenance of the filtration performance.</p></div></div>'+nav(1);} function step2(){return '<div class="step-grid"><div><p class="step-kicker">Step 2 · See live</p><h2 class="step-h">Bound to register <span class="reg">differenzdruck_bar</span></h2><p class="step-p">This wizard is linked to a real register. The value is read as <b>read-only</b> and calculated <b> in the house </b> — nothing leaves the system. Becomes visible via the connected components.</p></div><img class="step-img" src="../img/filtration.jpg" alt="Live view"></div>'+nav(2);} function step3(){return '<div class="step_grid"><div><p class="step-kicker">Step 3 · What the AI does</p>'+ '<h2 class="step-h">What the AI reads from this component</h2><ul class="chk">'+li('Differential pressure (bar) as an indicator of <b>filter clogging</b>')+li('Flow rates to check <b>pump power</b>')+li('Measured values to determine the optimal <b>backwash interval</b>')+li('Trend analysis for detecting <b>media wear</b> or channel formation')+'</ul></div>'+ '<img class="step-img" src="../img/filtration.jpg" alt="AI monitors"></div>'+ '<div class="szen1"><div><p class="mon">Monitoring: Pressure difference & flow rate per hour</p>'+ '<p class="step-p"><b>The scenario:</b> Blocked filter or continuous pump operation at full speed. Up to 35 % of the pool\'s electricity is consumed for unregulated circulation<br>'+ '<b>The AI:</b> The AI adjusts the speed according to actual demand and reports the backwash timing based on differential pressure. <b>It detects the trend before the limit is reached.</b></p></div></div>'+nav(3);} function step4(){return '<p class="step_kicker">Step 4 · Your benefit</p><h2 class="step-h">Why does this matter?</h2>>'+ '<div class="benefit"><h3>Early detection of blockages reduces downtime and protects circulation pumps from cavitation.</h3><p>Automating backwash cycles based on differential pressure ensures constant water quality. This significantly reduces the manual inspection effort for staff in swimming pool operations.</p></div>'+ '<div class="calcbox"><p class="step-p">Pump power (kW) <input id="c0" type="number" step="any" value="8" oninput="r()"> · Filter runtime (h/day) <input id="c1" type="number" step="any" value="12" oninput="r()"> · Season length (days/yr) <input id="c2" type="number" step="any" value="300" oninput="r()"> · Speed reduction (%) <input id="c3" type="number" step="any" value="35" oninput="r()"> · Electricity price (ct/kWh) <input id="c4" type="number" step="any" value="22" oninput="r()"> → <b><span id="o" style="color:var(--accent)">—</span> €/year</b></p>'+ '<p class="mon" style="margin-top:.5rem">Calculation: Pump power × Speed reduction × Electricity price — speed control reduces consumption disproportionately.</p></div>'+nav(4);} function r(){var v=[];for(var i=0;i<5;i++){var e=document.getElementById('c'+i);v.push(e?parseFloat(e.value)||0:0);}'o');if(o)o.textContent=(Math.round(res*100)/100).toLocaleString('de-DE');}'body').innerHTML=state.step===1?step1():state.step===2?step2():state.step===3?step3():step4();'#steps .st').forEach(function(el){var n=+el.getAttribute('data-s');el.classList.toggle('on',n===state.step);el.classList.toggle('done',n<state.step);});'smooth'});} document.querySelectorAll('#steps .st').forEach(function(el){el.style.cursor='pointer';el.onclick=function(){go(+el.getAttribute('data-s'));};}); render(); </script></body></html>