{"product_id":"overhead-stirrers-40-liter-ohs-40d","title":"Overhead Stirrers 40 Liter – OHS-40D","description":"\u003c!-- ============================================================\n     Surge Scientific — Overhead Stirrer 40 Liter \/ 40 N·cm Torque\n     Model: OHS-40D\n     Shopify Product Description\n     Brand System : Deep Teal (#0d2b2b \/ #0d4a4a \/ #0a7373) + Burnt Amber (#bf6000)\n     Theme        : Athens by Truly Fine Pixels\n     Font sizing  : 100% em-based — scales with Athens' Typography Scale slider\n     Layout       : width:100%; no fixed max-width — fits Athens'\n                    right column (~580px) AND full-width Liquid block\n     ============================================================ --\u003e\n\n\u003cstyle\u003e\n  \/* ── Brand color tokens ── *\/\n  :root {\n    --teal-deepest:   #0d2b2b;\n    --teal-dark:      #0d4a4a;\n    --teal-mid:       #0a7373;\n    --amber:          #bf6000;\n    --teal-light:     #e0f2f1;\n    --teal-border:    #b2dfdb;\n    --teal-pale:      #80cbc4;\n    --text-body:      #2c4a4a;\n    --text-secondary: #3a5a5a;\n    --hover-amber:    #fff8e1;\n    --white:          #ffffff;\n  }\n\n  \/* ── Root container ── *\/\n  .prod-desc {\n    font-family: 'Georgia', 'Times New Roman', serif;\n    font-size: 1em;\n    color: var(--teal-deepest);\n    width: 100%;\n    max-width: 100%;\n    box-sizing: border-box;\n    line-height: 1.7;\n  }\n\n  \/* ── 1. 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margin: 0 0 1em;\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: 0.5em 1.5em;\n  }\n  .prod-features li {\n    font-size: 0.875em;\n    color: var(--text-body);\n    padding-left: 1.375em;\n    position: relative;\n    line-height: 1.5;\n  }\n  .prod-features li::before {\n    content: '✓';\n    position: absolute;\n    left: 0;\n    color: var(--amber);\n    font-weight: 700;\n    font-size: 1em;\n  }\n\n  \/* ── Use Case Cards — 3-col ── *\/\n  .prod-usecases {\n    display: grid;\n    grid-template-columns: repeat(3, minmax(0, 1fr));\n    gap: clamp(0.625em, 1.5vw, 0.875em);\n    margin-bottom: 0.5em;\n  }\n  .prod-usecase {\n    background: var(--teal-dark);\n    color: var(--white);\n    padding: clamp(0.875em, 2vw, 1.125em) clamp(0.75em, 1.5vw, 1em);\n    border-radius: 4px;\n    text-align: center;\n    box-sizing: border-box;\n  }\n  .prod-usecase-icon { font-size: 1.625em; display: block; margin-bottom: 0.5em; }\n  .prod-usecase-title {\n    font-family: 'Arial', sans-serif;\n    font-size: 0.75em;\n    font-weight: 700;\n    letter-spacing: 0.06em;\n    text-transform: uppercase;\n    color: var(--amber);\n    margin-bottom: 0.375em;\n  }\n  .prod-usecase p {\n    font-size: 0.8125em;\n    color: rgba(255,255,255,0.75);\n    margin: 0;\n    line-height: 1.5;\n  }\n\n  \/* ── Badges ── *\/\n  .prod-badges {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 0.625em;\n    margin-bottom: 0.5em;\n  }\n  .prod-badge {\n    font-family: 'Arial', sans-serif;\n    font-size: 0.6875em;\n    font-weight: 700;\n    letter-spacing: 0.06em;\n    text-transform: uppercase;\n    background: var(--teal-dark);\n    color: var(--white);\n    padding: 0.4em 0.75em;\n    border-radius: 2px;\n  }\n  .prod-badge.amber  { background: var(--amber); color: var(--white); }\n  .prod-badge.outline {\n    background: transparent;\n    color: var(--teal-dark);\n    border: 1.5px solid var(--teal-dark);\n  }\n\n  \/* ── Specifications Table ── *\/\n  .prod-specs-wrap {\n    width: 100%;\n    overflow-x: auto;\n    -webkit-overflow-scrolling: touch;\n    margin-bottom: 0.5em;\n  }\n  .prod-specs-table {\n    width: 100%;\n    min-width: 420px;\n    border-collapse: collapse;\n    font-size: 0.875em;\n    font-family: 'Arial', sans-serif;\n  }\n  .prod-specs-table thead tr { background: var(--teal-dark); color: var(--white); }\n  .prod-specs-table thead th {\n    padding: clamp(0.5em, 1.2vw, 0.625em) clamp(0.625em, 1.5vw, 0.875em);\n    text-align: left;\n    font-size: 0.6875em;\n    letter-spacing: 0.12em;\n    text-transform: uppercase;\n    white-space: nowrap;\n  }\n  .prod-specs-table tbody tr:nth-child(even) { background: var(--teal-light); }\n  .prod-specs-table tbody tr:hover { background: var(--hover-amber); }\n  .prod-specs-table td {\n    padding: clamp(0.5em, 1vw, 0.5625em) clamp(0.625em, 1.5vw, 0.875em);\n    border-bottom: 1px solid var(--teal-border);\n    color: var(--text-body);\n    vertical-align: top;\n  }\n  .prod-specs-table td:first-child {\n    font-weight: 600;\n    color: var(--teal-deepest);\n    width: 36%;\n  }\n\n  \/* ── Warranty Strip ── *\/\n  .prod-warranty {\n    background: linear-gradient(135deg, #0a7373, #0d4a4a);\n    color: var(--white);\n    padding: clamp(0.875em, 2vw, 1em) clamp(1em, 2.5vw, 1.5em);\n    border-radius: 4px;\n    display: flex;\n    align-items: flex-start;\n    gap: 0.875em;\n    margin-top: clamp(1.5em, 3vw, 2.5em);\n    box-sizing: border-box;\n  }\n  .prod-warranty-icon { font-size: 1.75em; flex-shrink: 0; margin-top: 0.125em; }\n  .prod-warranty p { margin: 0; font-size: 0.875em; line-height: 1.5; }\n  .prod-warranty strong { color: var(--amber); }\n\n  \/* ── Responsive ── *\/\n  @media (max-width: 600px) {\n    .prod-usecases { grid-template-columns: 1fr; }\n  }\n  @media (max-width: 480px) {\n    .prod-pillars,\n    .prod-features { grid-template-columns: 1fr; }\n    .prod-hero h1 { font-size: 1.25em; }\n  }\n\u003c\/style\u003e\n\n\u003cdiv class=\"prod-desc\"\u003e\n\n  \u003c!-- ── 1. HERO BANNER ── --\u003e\n  \u003cdiv class=\"prod-hero\"\u003e\n    \u003cp class=\"prod-hero-eyebrow\"\u003eSurge Scientific · Model OHS-40D\u003c\/p\u003e\n    \u003ch1\u003eOverhead Laboratory Stirrer\u003cbr\u003e40 Liter · 40 N·cm Torque\u003c\/h1\u003e\n    \u003cp class=\"prod-hero-sub\"\u003eBrushless DC Motor · 50–2000 RPM · 5,000 mPa·s Viscosity · ±1% Speed Accuracy · 110 W Output\u003c\/p\u003e\n    \u003cp class=\"prod-hero-lead\"\u003e\n      The OHS-40D is the stirrer you reach for when the 20L benchtop unit runs out of motor — 40 liters of batch capacity, five times the viscosity rating, and nearly double the output power, all driven by the same closed-loop brushless DC controller that holds your setpoint regardless of what the sample does mid-run. Emulsions, polymer blends, viscous dispersions — the shaft keeps turning at the speed you set.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── 2. WHY 5,000 MPA·S MATTERS ── --\u003e\n  \u003cdiv class=\"prod-section\"\u003e\n    \u003cp class=\"prod-section-title\"\u003eWhy Viscosity Headroom Changes Everything\u003c\/p\u003e\n    \u003cp\u003e\n      Most overhead stirrers quote their torque rating at water-thin viscosity — where any motor looks strong. The honest spec is the one buyers rarely check: what viscosity can the unit hold at setpoint? A stirrer rated for 1,000 mPa·s will visibly slow the moment your polymer crosslinks, your suspension thickens, or your emulsion inverts. The setpoint on the display becomes a number the motor aspires to, not a speed it delivers.\n    \u003c\/p\u003e\n    \u003cp\u003e\n      The OHS-40D carries a \u003cstrong\u003e5,000 mPa·s viscosity rating\u003c\/strong\u003e — five times the headroom of entry-level units — paired with \u003cstrong\u003e40 N·cm of torque\u003c\/strong\u003e at the shaft. That margin is what keeps a stirrer useful across the full evolution of a reaction, not just the easy first hour.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── 3. FOUR VALUE PILLARS ── --\u003e\n  \u003cdiv class=\"prod-pillars\"\u003e\n    \u003cdiv class=\"prod-pillar\"\u003e\n      \u003cspan class=\"prod-pillar-icon\"\u003e💪\u003c\/span\u003e\n      \u003cp class=\"prod-pillar-title\"\u003e40 N·cm of Usable Torque\u003c\/p\u003e\n      \u003cp\u003eRated for \u003cstrong\u003e40 liters at up to 5,000 mPa·s\u003c\/strong\u003e — the working range of polymer synthesis, resin blending, and high-solids formulation. Not a peak spec, a sustained one.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"prod-pillar\"\u003e\n      \u003cspan class=\"prod-pillar-icon\"\u003e⚙️\u003c\/span\u003e\n      \u003cp class=\"prod-pillar-title\"\u003eBrushless DC Drive\u003c\/p\u003e\n      \u003cp\u003e110 W max output power with zero brush wear. No carbon dust, no periodic service, no performance drift — a service life counted in years of duty, not motor hours.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"prod-pillar\"\u003e\n      \u003cspan class=\"prod-pillar-icon\"\u003e🛡️\u003c\/span\u003e\n      \u003cp class=\"prod-pillar-title\"\u003eTriple-Layer Safety\u003c\/p\u003e\n      \u003cp\u003eProprietary \u003cstrong\u003etorque-overload cutoff\u003c\/strong\u003e, independent over-temperature protection, and dedicated motor protection — with four audible fault codes for instant diagnosis.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"prod-pillar\"\u003e\n      \u003cspan class=\"prod-pillar-icon\"\u003e🎯\u003c\/span\u003e\n      \u003cp class=\"prod-pillar-title\"\u003e±1% Speed Accuracy\u003c\/p\u003e\n      \u003cp\u003eClosed-loop control holds 50–2000 RPM in stepless 10 RPM steps. The display alternates set and actual speed so you see the controller working — not just trust it.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── 4. CALLOUT BOX ── --\u003e\n  \u003cdiv class=\"prod-callout\"\u003e\n    \u003cp\u003e\n      \u003cstrong\u003e\"40 N·cm held flat to 5,000 mPa·s.\"\u003c\/strong\u003e —\n      The OHS-40D delivers its rated torque across the full viscosity curve. When your emulsion thickens or your resin cures, the controller pushes more current — the shaft doesn't slow down.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── 5. KEY FEATURES ── --\u003e\n  \u003cdiv class=\"prod-section\"\u003e\n    \u003cp class=\"prod-section-title\"\u003eKey Features\u003c\/p\u003e\n    \u003cul class=\"prod-features\"\u003e\n      \u003cli\u003eMax torque 40 N·cm at the shaft\u003c\/li\u003e\n      \u003cli\u003eMax batch volume 40 L (water)\u003c\/li\u003e\n      \u003cli\u003eMax viscosity 5,000 mPa·s\u003c\/li\u003e\n      \u003cli\u003eMax output power 110 W\u003c\/li\u003e\n      \u003cli\u003eSpeed range 50–2000 RPM\u003c\/li\u003e\n      \u003cli\u003eStepless 10 RPM increment\u003c\/li\u003e\n      \u003cli\u003e±1% speed accuracy (closed loop)\u003c\/li\u003e\n      \u003cli\u003eBright LED display — set and actual speed alternating\u003c\/li\u003e\n      \u003cli\u003eMaintenance-free brushless DC motor\u003c\/li\u003e\n      \u003cli\u003eThrough-shaft housing — adjustable impeller height\u003c\/li\u003e\n      \u003cli\u003e0.5–10 mm keyed clamping chuck\u003c\/li\u003e\n      \u003cli\u003eOverload torque cutoff circuit\u003c\/li\u003e\n      \u003cli\u003eIndependent over-temperature protection\u003c\/li\u003e\n      \u003cli\u003eDedicated motor protection circuit\u003c\/li\u003e\n      \u003cli\u003eFour fault codes with audible alarm\u003c\/li\u003e\n      \u003cli\u003eLarge knob — push to start \/ stop, turn to set speed\u003c\/li\u003e\n      \u003cli\u003eIP42 dust and splash protection per DIN EN 60529\u003c\/li\u003e\n      \u003cli\u003eDual voltage: 100–240V, 50\/60 Hz\u003c\/li\u003e\n      \u003cli\u003eCompact 71 × 174 × 240 mm drive head\u003c\/li\u003e\n      \u003cli\u003e2.5 kg head weight — easy to reposition\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── 6. IDEAL APPLICATIONS ── --\u003e\n  \u003cdiv class=\"prod-section\"\u003e\n    \u003cp class=\"prod-section-title\"\u003eIdeal Applications\u003c\/p\u003e\n    \u003cdiv class=\"prod-usecases\"\u003e\n      \u003cdiv class=\"prod-usecase\"\u003e\n        \u003cspan class=\"prod-usecase-icon\"\u003e🧪\u003c\/span\u003e\n        \u003cp class=\"prod-usecase-title\"\u003ePolymer \u0026amp; Resin\u003c\/p\u003e\n        \u003cp\u003ePolymerization, resin crosslinking, and high-solids blending where viscosity climbs sharply mid-reaction.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"prod-usecase\"\u003e\n        \u003cspan class=\"prod-usecase-icon\"\u003e🧴\u003c\/span\u003e\n        \u003cp class=\"prod-usecase-title\"\u003eFormulation \u0026amp; Scale-Up\u003c\/p\u003e\n        \u003cp\u003eCosmetic, personal-care, and coating formulations — pilot-scale batches that outgrow 20L gear but aren't yet reactor-scale.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"prod-usecase\"\u003e\n        \u003cspan class=\"prod-usecase-icon\"\u003e🏭\u003c\/span\u003e\n        \u003cp class=\"prod-usecase-title\"\u003ePilot \u0026amp; Process Labs\u003c\/p\u003e\n        \u003cp\u003eDissolution, suspension, and emulsion work in pilot plants, process-development labs, and production-support QC.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── 7. WHAT'S IN THE BOX ── --\u003e\n  \u003cdiv class=\"prod-section\"\u003e\n    \u003cp class=\"prod-section-title\"\u003eWhat's in the Box\u003c\/p\u003e\n    \u003cp\u003eEvery OHS-40D ships with the components needed to begin stirring — support stand, extension arm, chuck, and drive head. Impellers are sold separately to match your sample's viscosity and geometry.\u003c\/p\u003e\n    \u003cdiv class=\"prod-badges\"\u003e\n      \u003cspan class=\"prod-badge amber\"\u003eDrive Head (OHS-40D)\u003c\/span\u003e\n      \u003cspan class=\"prod-badge amber\"\u003eExtension Arm\u003c\/span\u003e\n      \u003cspan class=\"prod-badge\"\u003eUniversal Plate Stand\u003c\/span\u003e\n      \u003cspan class=\"prod-badge\"\u003eClamping Chuck with Key\u003c\/span\u003e\n      \u003cspan class=\"prod-badge\"\u003ePower Cord\u003c\/span\u003e\n      \u003cspan class=\"prod-badge outline\"\u003eUser Manual\u003c\/span\u003e\n      \u003cspan class=\"prod-badge outline\"\u003eImpellers Sold Separately\u003c\/span\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── 8. TECHNICAL SPECIFICATIONS ── --\u003e\n  \u003cdiv class=\"prod-section\"\u003e\n    \u003cp class=\"prod-section-title\"\u003eTechnical Specifications\u003c\/p\u003e\n    \u003cdiv class=\"prod-specs-wrap\"\u003e\n      \u003ctable class=\"prod-specs-table\"\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth\u003eParameter\u003c\/th\u003e\n            \u003cth\u003eSpecification\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eModel \/ SKU\u003c\/td\u003e\n\u003ctd\u003eOHS-40D\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMax Torque at Shaft\u003c\/td\u003e\n\u003ctd\u003e40 N·cm\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMax Stirring Quantity\u003c\/td\u003e\n\u003ctd\u003e40 L (H₂O)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMax Viscosity\u003c\/td\u003e\n\u003ctd\u003e5,000 mPa·s\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSpeed Range (Normal Load)\u003c\/td\u003e\n\u003ctd\u003e0 \/ 50–2000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSpeed Increment\u003c\/td\u003e\n\u003ctd\u003eStepless, 10 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSpeed Accuracy\u003c\/td\u003e\n\u003ctd\u003e±1%\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMotor Type\u003c\/td\u003e\n\u003ctd\u003eBrushless DC, maintenance-free\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMax Output Power\u003c\/td\u003e\n\u003ctd\u003e110 W\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eRated Power\u003c\/td\u003e\n\u003ctd\u003e65 W\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eLED — set \/ actual speed alternating\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eClamping Chuck Range\u003c\/td\u003e\n\u003ctd\u003e0.5–10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eOverload Protection\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMotor Protection\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eOver-Temperature Protection\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eIngress Protection\u003c\/td\u003e\n\u003ctd\u003eIP42 (per DIN EN 60529)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePermissible Ambient Temp\u003c\/td\u003e\n\u003ctd\u003e5–40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePermissible Relative Humidity\u003c\/td\u003e\n\u003ctd\u003e≤ 80%\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eVoltage \/ Frequency\u003c\/td\u003e\n\u003ctd\u003e100–240V, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eDimensions (D × W × H)\u003c\/td\u003e\n\u003ctd\u003e71 × 174 × 240 mm (without extension arm)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e2.5 kg (with extension arm and chuck)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── 9. WARRANTY \u0026 SUPPORT ── --\u003e\n  \u003cdiv class=\"prod-warranty\"\u003e\n    \u003cspan class=\"prod-warranty-icon\"\u003e🛡️\u003c\/span\u003e\n    \u003cp\u003e\n      \u003cstrong\u003eSurge Scientific Warranty \u0026amp; Support\u003c\/strong\u003e\u003cbr\u003e\n      This instrument is sold through Surge Scientific, your trusted laboratory equipment partner. Our product specialists are available Monday–Friday for assistance. The OHS-40D is backed by a \u003cstrong\u003e2-year all-inclusive manufacturer's warranty\u003c\/strong\u003e. Contact us at \u003cstrong\u003einfo@surgescientific.com\u003c\/strong\u003e or reach out directly to our support team at \u003cstrong\u003e855.943.3344\u003c\/strong\u003e for pre-sales questions, impeller selection, quotes, and technical assistance.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Four E's","offers":[{"title":"40 N.cm [40L]","offer_id":48646700630272,"sku":"OHS-40D","price":713.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0825\/1444\/4544\/files\/Overstar_.255_1680x_fa898fbc-033e-4422-a090-9da91cbf8f2f.jpg?v=1775151972","url":"https:\/\/surgescientific.com\/products\/overhead-stirrers-40-liter-ohs-40d","provider":"Surge Scientific","version":"1.0","type":"link"}