{"product_id":"geomembrane-thickness-gauge","title":"Geomembrane Thickness Gauge","description":"\u003ch2\u003e\u003cspan\u003eGeomembrane Thickness Gauge – QualiGTX™ TG GM\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe QualiGTX™ TG GM geomembrane thickness gauge measures polymeric and bituminous barrier sheets under a constant contact pressure of 20 kPa. Its digital indicator provides measurements across a 0 to 10 mm range with 0.01 mm resolution, allowing operators to read thickness directly from the display without estimating values from a dial. Geomembrane manufacturers, waterproofing material producers, and construction quality control laboratories use this instrument for routine thickness verification required by liner specifications for each production lot and delivered roll.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDesigned specifically for uniform-thickness barrier materials, the QualiGTX™ TG GM uses a single pressure setting and a flat contact surface. This focused design eliminates the need to adjust weights, exchange presser feet, or apply multiple loading stages associated with general-purpose geosynthetic thickness instruments. Shorter test cycles, straightforward operator training, and simplified measurement procedures allow technicians to perform thickness checks efficiently between production inspections.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe gauge also accommodates waterproofing materials and other flat sheet products beyond conventional geomembranes. Roofing membranes, pond liners, below-grade waterproofing sheets, and similar polymer- or asphalt-based materials can be tested using the same method and contact pressure. With a maximum measuring capacity of 10 mm, the QualiGTX™ TG GM covers liner thicknesses specified for containment systems, hydraulic projects, and civil engineering applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eGeomembrane Thickness Gauge – QualiGTX™ TG GM Applications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe QualiGTX™ TG GM is suitable for operations that routinely measure and verify the thickness of flat barrier sheets and waterproofing materials as part of their quality control procedures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eGeomembrane Manufacturing\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Verifies that smooth HDPE, LLDPE, and PVC liner sheets maintain their specified thickness throughout extrusion and calendering processes.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBituminous Barrier Production\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Measures asphalt-based waterproofing sheets where thickness directly affects barrier performance and material yield.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eLandfill Liner and Cap Quality Control\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Checks primary and secondary liner thickness against project specifications before installation crews deploy the material.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMining and Tailings Containment\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Verifies liner thickness for leach pads, ponds, and tailings facilities where the sheet provides the required containment barrier.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBuilding Waterproofing and Roofing\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Tests membranes and below-grade waterproofing materials intended for basement, deck, and roof applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCanal, Reservoir, and Pond Lining\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Confirms liner thickness for hydraulic projects where permeability calculations rely on measured material thickness.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eContractor Incoming Inspection\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Provides site and yard laboratories with an efficient method for checking delivered materials before installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eThird-Party Inspection Bodies\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Supports witness testing and shipment acceptance through consistent measurements under a single, defined contact pressure.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eGeomembrane Thickness Gauge – QualiGTX™ TG GM Key Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe QualiGTX™ TG GM integrates a digital thickness indicator with fixed-pressure loading in an instrument designed specifically for barrier sheet measurement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDigital Thickness Indicator\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Presents measurements numerically, eliminating parallax and interpolation errors associated with reading an analog dial.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0.01 mm Resolution\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Provides measurement detail suitable for the tolerance ranges specified for common liner and membrane thicknesses.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFixed 20 kPa Contact Pressure\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Applies a consistent pressure for every measurement without requiring weight selection, helping maintain repeatable results across operators and shifts.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e0 to 10 mm Measuring Range\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Accommodates materials ranging from thin waterproofing sheets to heavy containment liners without requiring setup changes.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFlat, Parallel Contact Faces\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Maintains alignment between the presser face and reference anvil, helping ensure that readings represent actual sheet thickness rather than errors caused by angular misalignment.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePurpose-Built Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Eliminates the multiple loading stages found in general-purpose geosynthetic testing instruments, reducing measurement time and operator training requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWide Material Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Measures polymeric and bituminous barriers, roofing membranes, tanking materials, and other flat sheet products using the same bench-mounted setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCompact Bench Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e: Requires minimal workspace, making the instrument suitable for production floor quality control stations and site laboratories.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eTheory and Method\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eGeomembranes respond to applied pressure differently from nonwoven geotextiles. Textile structures can undergo measurable compression as pressure increases, making thickness measurements at multiple pressure stages necessary. By comparison, solid polymeric and asphalt-based barriers with uniform thickness exhibit minimal deformation at the specified test pressures. Applying one defined pressure therefore provides a stable and repeatable thickness measurement. In this application, the contact pressure seats the presser foot against the specimen and displaces trapped air rather than compressing the material. A pressure of 20 kPa is sufficient for this purpose without deforming the sheet.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe pressure applied to a specimen depends on the applied force divided by the contact area, with both parameters fixed by the instrument. The sheet is positioned between a flat reference anvil and a parallel presser face. Once the applied load stabilizes, the instrument measures the perpendicular distance between these surfaces to determine sheet thickness. Maintaining parallel alignment is particularly important because even a slight tilt can introduce measurement errors across the contact area. Allowing the load to remain in place for the specified dwell period ensures that the contact surfaces are fully seated before the reading is recorded.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMeasurement resolution must also be evaluated in relation to the specimen's nominal thickness. For a 1.5 mm HDPE liner, a 0.01 mm measurement division represents approximately 0.7% of the nominal thickness. This level of resolution falls comfortably within the tolerance ranges typically specified for liner materials. The method is intended specifically for smooth sheets. Textured and structured membranes contain raised surface features that a flat presser face may bridge, making a different contact geometry and test method necessary for accurate thickness measurement.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003eGeomembrane Thickness Gauge - QualiGTX™ TG GM Technical Specifications\u003c\/h2\u003e\n\u003ctable class=\"table table-style-align-center\" align=\"center\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" width=\"612\"\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\u003eMeasuring Range\u003c\/td\u003e\n\u003ctd\u003e0 to 10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGraduation (Division Value)\u003c\/td\u003e\n\u003ctd\u003e0.01 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicator Type\u003c\/td\u003e\n\u003ctd\u003eDigital display indicator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplied Contact Pressure\u003c\/td\u003e\n\u003ctd\u003e0.02 MPa (20 kPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePresser Face Type\u003c\/td\u003e\n\u003ctd\u003eFlat parallel face for uniform-thickness materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial Scope\u003c\/td\u003e\n\u003ctd\u003ePolymeric and bituminous barrier sheet, waterproofing membranes, flat sheet products\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFormat\u003c\/td\u003e\n\u003ctd\u003eBenchtop\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Qualitest USA LC","offers":[{"title":"Default Title","offer_id":53459562955063,"sku":null,"price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0786\/1859\/1543\/files\/geomembrane-thickness-gauge12363.webp?v=1793359450","url":"https:\/\/qualitest.us\/pt\/products\/geomembrane-thickness-gauge","provider":"Qualitest USA LC","version":"1.0","type":"link"}