TrippNT Large Draft Shield — 18″ Clear Acrylic Cube with Downdraft Guard for Balance and Analytical Instrument Protection The TrippNT Large Draft Shield (SKU 50046) is a fully enclosed, cube-format instrument shield engineered for analytical laboratories where air currents from HVAC systems, fume hood exhaust, foot traffic, and door events are a documented source of analytical error. At 18⅛″ W × 18″ H × 19¼″ D, the 50046 is the 18-inch size in TrippNT’s four-cube draft shield series — larger than the 15-inch 50029 and smaller than the 22-inch Extra Large 50240 — making it the standard-specification choice for most precision analytical balances (0.1 mg to 1 mg readability), pH meters, dissolved oxygen meters, conductivity analyzers, and compact spectrophotometers in the ISO 3 to ISO 7 footprint range. The overhang panel (3-inch downdraft deflector running the full 18-inch width) adds protection against downward HVAC supply air, which conventional four-sided enclosures miss entirely. Construction is 3/16-inch cast clear acrylic: thick enough to eliminate flex vibration that can couple to a balance pan through the bench surface, fully transparent on all five sides for unobstructed sample manipulation, and compatible with standard lab disinfectants for routine surface wipe-down. The shield installs by simply placing it over the instrument — no assembly, no fasteners, no tools. A semicircular cord pass-through cutout on the rear panel accommodates balance communication cables, power cords, and probe leads without creating a gap that would compromise draft protection. The open front provides wide, unobstructed access for sample placement and adjustment without lifting or tilting the shield. Ships fully assembled. Compatible with standard laboratory benches (750mm, 900mm, and 36-inch work heights) and TrippNT workstation shelving. For the 22-inch cubic envelope required for tall magnetic stirrer platforms, gram balances with integrated screens, or large pH stands, specify the 50240 Extra Large. Technical Specifications Specification Detail Material 3/16″ Cast Clear Acrylic Color / Finish Clear (fully transparent, all 5 sides) Design Cube with downdraft deflecting overhang panel Cord Passthrough Semicircular cutout, rear panel Installation Set-in-place, no fasteners Product Dimensions (W × H × D) 18⅛″ × 18″ × 19¼″ Product Weight 9 lb Shipping Carton (L × W × H) 23″ × 23″ × 23″ Shipping Weight 20 lb (Ground / LTL Threshold) UPC 692041658922 HTS Code 3926.9 Country of Origin United States (Kansas City, MO) Laboratory and Clinical Applications The TrippNT 50046 is specified wherever air current interference with measurement precision must be controlled: analytical balance stations (ISO/ASTM weighing compliance, GMP batch records), pH and dissolved oxygen benches (ASTM D1293, EPA Method 150.1 compliance), ISE and conductivity analyzer workstations, compact spectrophotometer and colorimeter benches, refractometry and osmometry staging areas, dissolved CO₂ and BOD measurement stations, pharmacopeia weighing areas (USP , EP 2.1.7), food and beverage QC benches subject to exhaust fan cross-drafts, semiconductor and electronics lab microbalance positions, and any environment requiring protection from air currents without sacrificing the clear-field visibility needed for sample manipulation. Also specified in clinical labs for microalbumin and HbA1c benchtop analyzer protection, and in teaching labs for titrimetry and gravimetry exercises. Product Documentation Sales Sheet — 50046 Large Draft Shield (PDF) Made in the U.S.A. & Lifetime Guarantee Proudly manufactured in the United States by TrippNT. This draft shield is backed by a 100% Lifetime Guarantee, ensuring it is a permanent asset for your laboratory. Frequently Asked Questions What size draft shield do I need for my analytical balance? TrippNT makes four draft shield sizes: the 13-inch (50029 Small), 15-inch (50073 Medium — note: RAYNEU session scope), 18-inch (50046 Large), and 22-inch (50240 Extra Large). For most 0.1mg and 1mg analytical balances with a 4-inch diameter pan (Ohaus Pioneer, Mettler Toledo ME/MS, Sartorius Quintix/Entris series), the 50046 Large 18-inch fits without overhang. For balances with large readout screens or integral printer modules extending above the weighing chamber, verify the balance height + required clearance fits within the 18-inch interior before ordering. For top-loading balances and semi-micro balances wider than 12 inches, specify the 50240 22-inch Extra Large. How does the overhang panel improve draft protection over a simple four-sided box? A four-sided enclosure blocks lateral (horizontal) drafts but remains fully exposed to downward supply air from ceiling HVAC diffusers — one of the most common interference sources in modern laboratories with recirculating air systems. The TrippNT overhang panel is a 3-inch horizontal acrylic flange that runs the full width of the shield at the top front edge. It deflects downward airflows outward and away from the balance pan opening, reducing pan oscillation from top-down HVAC supply events by providing passive angular redirection. Labs running Mettler Toledo FACT (Fully Automatic Calibration Technology) or similar autozero systems in environments with active overhead diffusers will see measurable reductions in autozero event frequency after installing a shield with this overhang geometry. { "@context": "https://schema.org/", "@type": "Product", "name": "TrippNT Large Draft Shield", "image": [ "https://www.trippnt.com/web/image/product.product/1153/image_1024/%5B50046%5D%20Large%20Draft%20Shield?unique=778e1b9", "https://www.trippnt.com/web/image/product.image/334/image_1024/50046%20Pic%201.webp?unique=152b606", "https://www.trippnt.com/web/image/product.image/1224/image_1024/DWG%20-%2050046.1%20-%20Rev%207.webp?unique=04b6ec9" ], "description": "TrippNT 50046 large draft shield. 18-inch clear 3/16-inch acrylic cube with 3-inch downdraft guard — protects balances and analytical instruments from HVAC and lateral air currents. Semi-circle cord passthrough. Made in USA. 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For most 0.1mg-1mg analytical balances with a 4-inch pan (Ohaus, Mettler, Sartorius), the 18-inch 50046 fits without overhang. For balances wider than 12 inches or with extended printer modules, specify the 22-inch 50240 Extra Large." } }, { "@type": "Question", "name": "How does the overhang panel improve draft protection over a four-sided box?", "acceptedAnswer": { "@type": "Answer", "text": "A standard four-sided enclosure blocks lateral drafts but leaves the balance exposed to downward HVAC supply air from ceiling diffusers. The TrippNT 3-inch overhang panel deflects downward airflow outward and away from the balance pan opening, significantly reducing pan oscillation caused by top-down HVAC events — a common interference source in modern recirculating air laboratories." } } ] }
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