Oakton - pH Calibration Solution ; Pint

Isopure Water Verified independent store

→

.ro-wrap { --deep:#0a1628;--ocean:#0f3460;--blue:#1565c0;--sky:#2196f3;--aqua:#4dd0e1; --white:#ffffff;--offwhite:#f2f7fc;--slate:#dce8f5;--text:#0d1f38;--muted:#4a6280; --gold:#f5 9e0b;--radius:12px; font-family:'DM Sans',sans-serif;color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;overflow-wrap:break-word;word-break:break-word;min-width:0; } .ro-wrap .ro-hero{background:linear-gradient(135deg,var(--deep) 0%,var(--ocean) 50%,#1a5276 100%);color:var(--white);padding:52px 40px 44px;position:relative;overflow:hidden;border-radius:var(--radius) var(--radius) 0 0;} .ro-wrap .ro-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 70% 55% at 95% 45%,rgba(77,208,225,.15) 0%,transparent 65%),radial-gradient(ellipse 40% 40% at 5% 80%,rgba(255,255,255,.05) 0%,transparent 60%);pointer-events:none;} .ro-wrap .ro-eyebrow{font-size:13px !important;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--aqua);margin-bottom:12px;} .ro-wrap .ro-hero h2{font-family:'DM Serif Display',serif;font-size:clamp(26px,4vw,40px) !important;line-height:1.15;font-weight:400;margin-bottom:16px;color:var(--white);} .ro-wrap .ro-hero h2 em{font-style:italic;color:var(--aqua);} .ro-wrap .ro-tagline{font-size:18px !important;color:rgba(255,255,255,.75);font-weight:300;margin-bottom:28px;} .ro-wrap .ro-badges{display:flex;flex-wrap:wrap;gap:10px;} .ro-wrap .ro-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);color:var(--white);font-size:15px !important;font-weight:500;padding:6px 14px;border-radius:40px;backdrop-filter:blur(6px);} .ro-wrap .ro-callout{background:var(--offwhite);border-left:4px solid var(--sky);padding:20px 24px;} .ro-wrap .ro-callout p{font-size:18px !important;color:var(--text);line-height:1.7;margin:0;} .ro-wrap .ro-callout strong{color:var(--ocean);} .ro-wrap .ro-section{padding:36px 40px;border-bottom:1px solid var(--slate);} .ro-wrap .ro-label{font-size:13px !important;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--sky);margin-bottom:8px;} .ro-wrap .ro-title{font-family:'DM Serif Display',serif;font-size:24px !important;color:var(--deep);margin-bottom:20px;font-weight:400;} .ro-wrap .stage-pipeline{display:flex;flex-direction:column;gap:0;margin-top:4px;} .ro-wrap .stage-row{display:flex;flex-direction:row;gap:12px;position:relative;min-width:0;align-items:flex-start;width:100%;box-sizing:border-box;} .ro-wrap .stage-row:not(:last-child) .stage-line{position:absolute;left:17px;top:40px;bottom:0;width:2px;background:var(--slate);} .ro-wrap .stage-num{width:36px;height:36px;min-width:36px;max-width:36px;border-radius:50%;background:linear-gradient(135deg,var(--ocean),var(--sky));color:white;display:flex;align-items:center;justify-content:center;font-size:16px !important;font-weight:700;flex:0 0 36px;position:relative;z-index:1;margin-top:16px;} .ro-wrap .stage-body{background:var(--offwhite);border:1px solid var(--slate);border-radius:var(--radius);padding:16px 18px;margin-bottom:12px;flex:1 1 0;min-width:0;overflow:hidden;overflow-wrap:break-word;word-break:break-word;box-sizing:border-box;} .ro-wrap .stage-body h3{font-size:20px !important;font-weight:600;color:var(--deep);margin-bottom:8px;margin-top:6px;} .ro-wrap .stage-tag{display:block;font-size:12px !important;font-weight:700;letter-spacing:.04em;text-transform:uppercase;background:var(--slate);color:var(--ocean);padding:3px 8px;border-radius:4px;margin-bottom:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;line-height:1.5 !important;box-sizing:border-box;} .ro-wrap .stage-body p{font-size:18px !important;color:var(--muted);line-height:1.6;margin:0;display:block;} .ro-wrap .stage-body .stage-part{font-size:15px !important;color:var(--sky);margin-top:6px;font-weight:500;} .ro-wrap .specs-table{width:100%;border-collapse:collapse;font-size:18px !important;} .ro-wrap .specs-table tr{border-bottom:1px solid var(--slate);} .ro-wrap .specs-table tr:last-child{border-bottom:none;} .ro-wrap .specs-table td{padding:11px 6px;vertical-align:top;} .ro-wrap .specs-table td:first-child{font-weight:500;color:var(--deep);width:44%;padding-right:16px;} .ro-wrap .specs-table td:last-child{color:var(--muted);} .ro-wrap .specs-table tr:hover td{background:var(--offwhite);} .ro-wrap .conditions-table{width:100%;border-collapse:collapse;font-size:18px !important;margin-top:4px;} .ro-wrap .conditions-table th{background:var(--deep);color:var(--white);font-size:15px !important;font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:10px 12px;text-align:left;} .ro-wrap .conditions-table th:first-child{border-radius:var(--radius) 0 0 0;} .ro-wrap .conditions-table th:last-child{border-radius:0 var(--radius) 0 0;} .ro-wrap .conditions-table td{padding:10px 12px;border-bottom:1px solid var(--slate);color:var(--text);} .ro-wrap .conditions-table tr:nth-child(even) td{background:var(--offwhite);} .ro-wrap .ro-feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(220px,100%),1fr));gap:16px;margin-top:4px;} .ro-wrap .ro-feature-card{background:var(--offwhite);border:1px solid var(--slate);border-radius:var(--radius);padding:20px 18px;} .ro-wrap .ro-feat-icon{width:40px;height:40px;background:linear-gradient(135deg,var(--ocean),var(--sky));border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:12px;} .ro-wrap .ro-feature-card h3{font-size:20px !important;font-weight:600;color:var(--deep);margin-bottom:6px;} .ro-wrap .ro-feature-card p{font-size:18px !important;color:var(--muted);line-height:1.55;margin:0;} .ro-wrap .pro-tip{display:block;background:#fffbeb;border:1px solid #f5d87a;border-radius:var(--radius);padding:18px 20px;margin-top:20px;box-sizing:border-box;width:100% !important;} .ro-wrap .pro-tip-icon{font-size:22px !important;display:inline;margin-right:8px;line-height:1.6 !important;} .ro-wrap .pro-tip p{font-size:18px !important;color:#5a4500;line-height:1.6 !important;margin:0;display:block;width:100%;} .ro-wrap .pro-tip strong{color:#3d2e00;} .ro-wrap .install-steps{counter-reset:step;list-style:none;padding:0;margin:4px 0 0;display:flex;flex-direction:column;gap:14px;} .ro-wrap .install-steps li{counter-increment:step;display:flex;align-items:flex-start;gap:14px;font-size:18px !important;color:var(--text);} .ro-wrap .install-steps li::before{content:counter(step);display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--ocean);color:white;font-size:15px !important;font-weight:700;flex-shrink:0;margin-top:1px;} .ro-wrap .filter-schedule{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(180px,100%),1fr));gap:12px;margin-top:4px;} .ro-wrap .schedule-card{background:var(--offwhite);border:1px solid var(--slate);border-radius:var(--radius);padding:16px;} .ro-wrap .schedule-card .interval{font-size:22px !important;font-family:'DM Serif Display',serif;color:var(--sky);font-weight:400;margin-bottom:4px;} .ro-wrap .schedule-card h4{font-size:18px !important;font-weight:600;color:var(--deep);margin-bottom:4px;} .ro-wrap .schedule-card p{font-size:15px !important;color:var(--muted);margin:0;line-height:1.45;} .ro-wrap .benefits-strip{display:flex;flex-wrap:wrap;background:var(--deep);color:var(--white);border-radius:0 0 var(--radius) var(--radius);overflow:hidden;} .ro-wrap .benefit-item{flex:1 1 200px;padding:24px 22px;border-right:1px solid rgba(255,255,255,.1);} .ro-wrap .benefit-item:last-child{border-right:none;} .ro-wrap .bi-icon{font-size:22px !important;margin-bottom:10px;} .ro-wrap .benefit-item h4{font-size:15px !important;font-weight:600;color:var(--aqua);margin-bottom:5px;text-transform:uppercase;letter-spacing:.05em;} .ro-wrap .benefit-item p{font-size:15px !important;color:rgba(255,255,255,.65);line-height:1.55;margin:0;} .ro-wrap .faucet-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(200px,100%),1fr));gap:16px;margin-top:4px;} .ro-wrap .faucet-card{border:2px solid var(--slate);border-radius:var(--radius);padding:18px;text-align:center;} .ro-wrap .faucet-icon{font-size:28px !important;margin-bottom:10px;} .ro-wrap .faucet-card h4{font-size:18px !important;font-weight:600;color:var(--deep);margin-bottom:6px;} .ro-wrap .faucet-card p{font-size:15px !important;color:var(--muted);line-height:1.5;margin:0;} .ro-wrap .spec-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(180px,100%),1fr));gap:12px;margin-top:4px;} .ro-wrap .spec-card{background:var(--offwhite);border:1px solid var(--slate);border-radius:var(--radius);padding:16px;} .ro-wrap .spec-card .sc-label{font-size:13px !important;font-weight:700;letter-spacing:.08em;color:var(--sky);text-transform:uppercase;margin-bottom:4px;} .ro-wrap .spec-card .sc-value{font-size:20px !important;font-weight:600;color:var(--deep);margin-bottom:4px;} .ro-wrap .spec-card .sc-note{font-size:15px !important;color:var(--muted);} @media(max-width:640px){ .ro-wrap .ro-hero{padding:36px 24px 32px;} .ro-wrap .ro-section{padding:28px 20px;} .ro-wrap .ro-feature-grid,.ro-wrap .faucet-grid,.ro-wrap .filter-schedule,.ro-wrap .spec-cards{grid-template-columns:1fr;} .ro-wrap .benefits-strip{flex-direction:column;} .ro-wrap .benefit-item{border-right:none;border-bottom:1px solid rgba(255,255,255,.1);} } /* ── Nuclear override — force all text inside ro-wrap to be readable ── */ .ro-wrap p, .ro-wrap li, .ro-wrap td, .ro-wrap th, .ro-wrap .ro-section > p { font-size: 18px !important; line-height: 1.6 !important; } .ro-wrap .ro-section > p, .ro-wrap .ro-callout p, .ro-wrap .stage-body p, .ro-wrap .ro-feature-card p, .ro-wrap .schedule-card p, .ro-wrap .faucet-card p, .ro-wrap .spec-card .sc-note, .ro-wrap .pro-tip p { font-size: 18px !important; line-height: 1.6 !important; } .ro-wrap h2 { font-size: clamp(26px,4vw,40px) !important; line-height:1.15 !important; } .ro-wrap h3 { font-size: 20px !important; line-height:1.3 !important; } .ro-wrap h4 { font-size: 18px !important; line-height:1.3 !important; } .ro-wrap .ro-label, .ro-wrap .stage-tag, .ro-wrap .sc-label { font-size: 14px !important; } .ro-wrap .ro-title { font-size: 24px !important; } .ro-wrap .interval { font-size: 22px !important; } .ro-wrap .stage-num { font-size: 16px !important; } .ro-wrap .ro-eyebrow { font-size: 14px !important; } .ro-wrap .ro-badge { font-size: 15px !important; } The Oakton pH Calibration Solution delivers NIST-traceable accuracy for precise pH meter calibration in laboratory and field applications. Each 500 mL pint bottle is formulated to pH 4.01 buffer standards and includes complete ingredient documentation with CAS numbers and MSDS sheets for regulatory compliance. SPECIFICATIONS Oakton pH 4.01 Buffer Solution Technical Details Manufacturer Oakton Buffer pH Value 4.01 at 25°C Bottle Size 500 mL (1 Pint) Traceability NIST traceable materials Documentation pH vs temperature tables included Safety Information MSDS supplied, CAS numbers labeled Compliance Right-to-Know ingredient labeling Application Laboratory and field pH meter calibration INSTALLATION & USE Calibration Procedure Rinse the pH electrode with distilled or deionized water and gently blot dry with a lint-free tissue. Immerse the electrode in Oakton pH 4.01 buffer solution at the temperature indicated on the bottle label, ensuring the sensing element is fully submerged. Allow the reading to stabilize according to your meter's specifications, then adjust the calibration following the manufacturer's instructions. Rinse the electrode thoroughly with distilled water before testing samples or calibrating with additional buffer solutions. COMPATIBILITY Compatible Equipment This Oakton pH 4.01 calibration solution is compatible with all brands of pH meters and electrodes requiring a pH 4.01 buffer standard. Use with Oakton water quality meters, benchtop pH analyzers, and handheld testers from manufacturers including Hanna, Hach, Thermo Scientific, and Mettler Toledo. The NIST-traceable formulation ensures accuracy across laboratory, environmental testing, aquaculture, hydroponics, and water treatment applications. 🔧 Pro Tip: Store calibration solutions tightly capped at room temperature away from direct sunlight. Never pour used solution back into the original bottle as contamination will compromise accuracy. For best results, use fresh buffer solution from the bottle for each calibration session. Show more