{"title":"Measuring \u0026 Testing Instruments","description":"\u003cp\u003eThe Measuring \u0026amp; Testing Instruments collection provides precise tools for evaluating samples, monitoring lab processes, and ensuring accurate results. From refractometers and hemacytometers to digital counters and tachometers, these instruments are designed to meet the rigorous demands of clinical, research, and educational laboratories. Built for accuracy and reliability, they support consistent testing and streamlined workflows.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRefractometers for measuring solution concentrations\u003c\/li\u003e\n  \u003cli\u003eHemacytometers for cell counting and analysis\u003c\/li\u003e\n  \u003cli\u003eDigital differential counters for fast, accurate reporting\u003c\/li\u003e\n  \u003cli\u003eHand-held tachometers for centrifuge speed verification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"CollectionPage\",\n  \"name\": \"Measuring \u0026 Testing Instruments\",\n  \"description\": \"Shop measuring and testing instruments including refractometers, hemacytometers, tachometers, and digital differential counters for clinical and research labs.\",\n  \"url\": \"https:\/\/labessentials.com\/collections\/measuring-testing-instruments\",\n  \"mainEntity\": {\n    \"@type\": \"ItemList\",\n    \"itemListElement\": [\n      {\n        \"@type\": \"Product\",\n        \"name\": \"Refractometer\",\n        \"url\": \"https:\/\/labessentials.com\/products\/refractometer\"\n      },\n      {\n        \"@type\": \"Product\",\n        \"name\": \"Hemacytometer\",\n        \"url\": \"https:\/\/labessentials.com\/products\/hemacytometer\"\n      },\n      {\n        \"@type\": \"Product\",\n        \"name\": \"Digital Differential Counter\",\n        \"url\": \"https:\/\/labessentials.com\/products\/digital-differential-counter\"\n      }\n    ]\n  }\n}\n\u003c\/script\u003e\n","products":[{"product_id":"manual-differential-counters","title":"Manual Differential Counters","description":"\u003cp\u003eManual Differential Counters delivers reliable performance for lab workflows requiring precision and durability.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompact lab-ready design\u003c\/li\u003e\n\u003cli\u003eCompatible with digital accessories\u003c\/li\u003e\n\u003cli\u003eBacked by U.S.-based support\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"related-resources\"\u003e\n\u003ch3\u003eRelated Resources\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\"\u003eView Buying Guide\u003c\/a\u003e or explore related tools in .\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"trust-bullets\"\u003e\u003cul\u003e\n\u003cli\u003eFree Shipping on Orders $300+\u003c\/li\u003e\n\u003cli\u003eU.S.-Based Support\u003c\/li\u003e\n\u003cli\u003eSecure Checkout\u003c\/li\u003e\n\u003cli\u003eTrusted by 1,200+ Labs\u003c\/li\u003e\n\u003cli\u003eFast Shipping from U.S. Warehouse\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"LW Scientific","offers":[{"title":"5-Key Differential Counter","offer_id":41676466192443,"sku":"CTL-DIFM-05KY","price":130.0,"currency_code":"USD","in_stock":true},{"title":"8-Key Differential Counter","offer_id":41676466225211,"sku":"CTL-DIFM-08KY","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0338\/9141\/8171\/files\/manual-differential-counters-lab-essentials-inc-985339.jpg?v=1715182520"},{"product_id":"hemacytometer","title":"Hemacytometer","description":"\u003cp\u003ePrecision Cell Counting for Medical, Veterinary, and Research Applications\u003c\/p\u003e\n\u003cp\u003eThe Hemacytometer from LW Scientific is a high-precision counting chamber designed for accurate manual cell counting in blood, sperm, bacteria, and other fluid samples. Ideal for medical diagnostics, research laboratories, and veterinary applications, this essential tool ensures clear visibility and precise measurement of cell concentrations under a microscope.\u003c\/p\u003e\n\u003cp\u003eCrafted from high-quality, optically clear glass, the hemacytometer features etched grid lines for easy counting and reproducible results. The dual-chamber design allows for simultaneous sample analysis, improving efficiency and accuracy in laboratory procedures. Whether used for hematology, fertility testing, or microbiology, this hemacytometer provides reliable, repeatable results every time.\u003c\/p\u003e\n\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePrecision Etched Grid Lines – Ensures accurate and repeatable cell counting.\u003c\/li\u003e\n  \u003cli\u003eHigh-Quality Optical Glass – Provides superior clarity for clear, detailed visibility.\u003c\/li\u003e\n  \u003cli\u003eDual-Chamber Design – Allows for increased efficiency in sample processing.\u003c\/li\u003e\n  \u003cli\u003eReusable \u0026amp; Durable – Designed for long-term laboratory use with proper cleaning and care.\u003c\/li\u003e\n  \u003cli\u003eIdeal for Various Applications – Used in hematology, microbiology, fertility testing, and research.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhy Choose the LW Scientific Hemacytometer?\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTrusted Accuracy: Delivers precise manual cell counts for medical, veterinary, and research needs.\u003c\/li\u003e\n  \u003cli\u003eUser-Friendly Design: Clear grid lines and a high-quality glass chamber simplify the counting process.\u003c\/li\u003e\n  \u003cli\u003eReliable \u0026amp; Long-Lasting: Built to withstand repeated use with proper maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.dropbox.com\/s\/x0bieavezckc0t6\/SLS-7.5.3-L-078%20Hemacytometer%20Spec%20Sheet%20for%20email.pdf\" target=\"_blank\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.dropbox.com\/s\/6ukinitak6rjjml\/MKT-7.5.3-L-142%20Hemacytometer%20Manual%20for%20email.pdf\" target=\"_blank\"\u003eManual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LWScientific","offers":[{"title":"Default Title","offer_id":42307400237115,"sku":"CTL-HEMM-GLDR","price":137.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0338\/9141\/8171\/files\/Hemacytometer-LWScientific-37116250.jpg?v=1752513867"},{"product_id":"differential-counter","title":"Digital Differential Counter","description":"\u003cp\u003ePrecision Blood Cell Counting for Medical, Veterinary, and Research Labs\u003c\/p\u003e\n\u003cp\u003eThe LW Scientific Differential Counter is a highly accurate manual cell counter designed for white blood cell (WBC) differentiation in clinical, veterinary, and research laboratories. This essential tool helps lab professionals perform precise hematology analysis, supporting diagnostic procedures and disease detection with reliable manual counting.\u003c\/p\u003e\n\u003cp\u003eFeaturing easy-to-use tally buttons and a clear totalizer window, this counter ensures quick and efficient classification of different WBC types. With a durable, ergonomic design, it provides long-term reliability without requiring electrical power, making it a cost-effective and essential addition to any lab.\u003c\/p\u003e\n\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAccurate WBC Differentiation – Enables precise manual counting for hematology diagnostics.\u003c\/li\u003e\n  \u003cli\u003eUser-Friendly Tally System – Simple push-button operation for efficient classification.\u003c\/li\u003e\n  \u003cli\u003eBattery-Free \u0026amp; Reliable – Operates without power for uninterrupted workflow.\u003c\/li\u003e\n  \u003cli\u003eClear Totalizer Window – Displays cumulative counts for improved efficiency.\u003c\/li\u003e\n  \u003cli\u003eDurable Laboratory-Grade Construction – Built for continuous, long-term use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhy Choose the LW Scientific Differential Counter?\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEssential for Blood Analysis: Provides accurate manual WBC classification in clinical and research labs.\u003c\/li\u003e\n  \u003cli\u003eSimple \u0026amp; Efficient Operation: Intuitive tally buttons ensure quick and reliable counting.\u003c\/li\u003e\n  \u003cli\u003eLong-Lasting \u0026amp; Maintenance-Free: No batteries or electrical power required for consistent performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" title=\"Digital Differential Counter Spec Sheet\" href=\"https:\/\/www.dropbox.com\/s\/5day8tgsdj8tuyf\/SLS-7.5.3-L-063%20Differential%20Counters%20Spec%20Sheet%20for%20email.pdf?dl=0\" target=\"_blank\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener noreferrer\" title=\"Digital Differential Counter Manual\" href=\"https:\/\/www.dropbox.com\/s\/j6402s4nny5bb86\/MKT-7.5.3-L-191%20Digital%208%20Key%20Counter%20Manual%20for%20email.pdf?dl=0\" target=\"_blank\"\u003eUser Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LWScientific","offers":[{"title":"Default Title","offer_id":42307400368187,"sku":"CTL-DIFD-08KP","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0338\/9141\/8171\/files\/Digital-Differential-Counter-LWScientific-37115941.jpg?v=1752513882"},{"product_id":"refractometer","title":"Refractometer","description":"\u003cp\u003ePrecision Fluid Analysis for Laboratory, Veterinary, and Industrial Applications\u003c\/p\u003e\n\u003cp\u003eThe LW Scientific Refractometer is a high-precision optical instrument designed for accurate measurement of fluid concentrations, \u003cspan\u003emaking it ideal for research labs, veterinary clinics, breweries, food processing, and educational and industrial applications.\u003c\/span\u003e Whether used for urine specific gravity, serum protein analysis, or Brix measurements, this refractometer delivers quick, reliable results with easy-to-read scales.\u003c\/p\u003e\n\u003cp\u003eFeaturing a high-quality optical lens, ATC (Automatic Temperature Compensation), and a durable, lightweight design, the LW Scientific Refractometer ensures consistent accuracy across various environmental conditions. The ergonomic grip and smooth focusing mechanism provide ease of use, while the compact size makes it a portable and essential tool for fluid analysis professionals.\u003c\/p\u003e\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-Precision Optical Lens – Ensures sharp, accurate fluid concentration readings.\u003c\/li\u003e\n\u003cli\u003eAutomatic Temperature Compensation (ATC) – Provides consistent results in varying conditions.\u003c\/li\u003e\n\u003cli\u003eEasy-to-Read Scale \u0026amp; Clear Display – Enables quick and accurate measurements.\u003c\/li\u003e\n\u003cli\u003eDurable \u0026amp; Lightweight Design – Built for long-term use in laboratory and field applications.\u003c\/li\u003e\n\u003cli\u003eWide Range of Applications – \u003cspan\u003eIdeal for research labs, veterinary clinics, breweries, food processing, and educational and industrial applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhy Choose the LW Scientific Refractometer?\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVersatile \u0026amp; Reliable: Measures urine specific gravity, serum protein, and Brix levels with precision.\u003c\/li\u003e\n\u003cli\u003eUser-Friendly Operation: Simple focusing mechanism and ergonomic design for ease of use.\u003c\/li\u003e\n\u003cli\u003ePortable \u0026amp; Durable: Compact construction allows for both laboratory and field applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dropbox.com\/s\/sj6fcwxk3avc11o\/SLS-7.5.3-L-008%20Refractometer%20Spec%20Sheet%20for%20email.pdf\" target=\"_blank\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dropbox.com\/s\/nr6vvqk999rn0c3\/MKT-7.5.3-L-036%20Refractometer%20Manual%20for%20email.pdf\" target=\"_blank\"\u003eUser Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LWScientific","offers":[{"title":"Specific Gravity \/ Protein","offer_id":42307400499259,"sku":"CTL-REFM-PRSG","price":182.0,"currency_code":"USD","in_stock":true},{"title":"BRIX 0-32% Scale","offer_id":42307400532027,"sku":"CTL-REFM-BR32","price":182.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0338\/9141\/8171\/files\/Refractometer-LWScientific-37115088.jpg?v=1752513889"},{"product_id":"digital-rotator","title":"Digital Rotator","description":"\u003cp\u003ePrecision Sample Mixing for Laboratories and Research Facilities\u003c\/p\u003e\n\u003cp\u003eThe LW Scientific Digital Rotator is a high-performance, programmable rotator designed for precise mixing of blood, reagents, and other laboratory samples. Ideal for clinical, research, and industrial labs, this advanced rotator provides consistent, controlled motion, ensuring even distribution and optimal sample preparation for hematology, chemistry, and microbiology applications.\u003c\/p\u003e\n\u003cp\u003eFeaturing an adjustable speed and timer function, the Digital Rotator allows users to customize rotation speed and mixing duration, providing flexibility for various sample types. Its quiet, maintenance-free motor ensures smooth, continuous operation, while the compact, space-saving design makes it an essential tool for any laboratory environment.\u003c\/p\u003e\n\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDigital Speed \u0026amp; Timer Control – Allows precise adjustments for consistent sample mixing.\u003c\/li\u003e\n  \u003cli\u003eMulti-Angle Rotation – Ensures uniform mixing for improved accuracy in testing.\u003c\/li\u003e\n  \u003cli\u003eQuiet, Maintenance-Free Motor – Provides smooth, reliable performance for long-term use.\u003c\/li\u003e\n  \u003cli\u003eCompact \u0026amp; Space-Saving Design – Fits easily into any lab setup.\u003c\/li\u003e\n  \u003cli\u003eDurable \u0026amp; User-Friendly – Built for continuous operation in demanding lab environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhy Choose the LW Scientific Digital Rotator?\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAccurate \u0026amp; Efficient Sample Mixing: Ideal for blood work, reagent preparation, and cell cultures.\u003c\/li\u003e\n  \u003cli\u003eUser-Friendly Operation: Digital controls make it easy to customize speed and duration.\u003c\/li\u003e\n  \u003cli\u003eReliable \u0026amp; Long-Lasting: Durable construction with a maintenance-free motor for long-term performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.dropbox.com\/s\/3lchh3mo2ultd3p\/SLS-7.5.3-L-054%20Digital%20Rotator%20Spec%20Sheet%20for%20email.pdf\" target=\"_blank\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.dropbox.com\/s\/yffp6xdy2vba4dk\/MKT-7.5.3-L-213%20Digital%20Rotator%20Manual%20for%20email.pdf\" target=\"_blank\"\u003eUser Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LWScientific","offers":[{"title":"Default Title","offer_id":42307400990779,"sku":"RTL-BLVD-24T3","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0338\/9141\/8171\/files\/Digital-Rotator-LWScientific-37116747.jpg?v=1752513906"},{"product_id":"hand-held-tachometer","title":"Hand Held Tachometer","description":"\u003cp\u003ePrecision RPM Measurement for Laboratory and Industrial Applications\u003c\/p\u003e\n\u003cp\u003eThe Hand-Held Tachometer is a high-accuracy digital device designed to measure rotational speed (RPM) in centrifuges, motors, and other rotating equipment. Ideal for laboratory, industrial, and mechanical applications, this portable tachometer ensures precise performance monitoring for equipment calibration and maintenance.\u003c\/p\u003e\n\u003cp\u003eFeaturing a user-friendly digital display, the tachometer provides quick, accurate readings with non-contact and contact measurement options. Its lightweight, ergonomic design makes it easy to operate, while the durable construction ensures long-term reliability in scientific and industrial settings.\u003c\/p\u003e\n\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAccurate RPM Measurement – Provides precise speed readings for laboratory and industrial use.\u003c\/li\u003e\n  \u003cli\u003eNon-Contact \u0026amp; Contact Modes – Offers versatile measurement options for different applications.\u003c\/li\u003e\n  \u003cli\u003eDigital LCD Display – Ensures easy reading of RPM values with high visibility.\u003c\/li\u003e\n  \u003cli\u003ePortable \u0026amp; Lightweight Design – Ergonomic build for comfortable one-handed operation.\u003c\/li\u003e\n  \u003cli\u003eDurable \u0026amp; Reliable Performance – Built for long-term use in demanding environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWhy Choose the Hand-Held Tachometer?\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEssential for Equipment Maintenance: Ideal for monitoring centrifuge speed and motor calibration.\u003c\/li\u003e\n  \u003cli\u003eQuick \u0026amp; Reliable Readings: Digital display provides fast and accurate RPM measurements.\u003c\/li\u003e\n  \u003cli\u003ePortable \u0026amp; Easy to Use: Lightweight design makes it a convenient tool for fieldwork and lab use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.dropbox.com\/s\/963rxbd47s0atj2\/SLS-7.5.3-L-051%20Hand%20Held%20Tach%20Spec%20Sheet%20for%20email.pdf?dl=0\" target=\"_blank\"\u003eSpecifications\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"https:\/\/www.dropbox.com\/s\/wloy1h72b90m4cy\/MKT-7.5.3-L-317%20Handheld%20Tachometer%20Instruction%20Manual%20for%20email.pdf?dl=0\" target=\"_blank\"\u003eUser Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LWScientific","offers":[{"title":"Default Title","offer_id":42307402858555,"sku":"CNA-TACH-DHH7","price":206.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0338\/9141\/8171\/files\/Hand-Held-Tachometer-LWScientific-37125365.jpg?v=1752513970"}],"url":"https:\/\/labessentials.com\/collections\/measuring-testing-instruments.oembed","provider":"Lab Essentials, Inc.","version":"1.0","type":"link"}