-
Johnson Test Papers offers litmus papers for the routine management of acid or alkali reactions in industry. These papers do not require the need for a colour chart as their purpose is to demonstrate qualitative analysis in a simple 'yes' and 'no' manner. They will not provide accurate pH measurement, but will change from one colour to another at a set pH value. These user-friendly test papers are suitable for many industrial and education applications -
Grade 301 is the slowest of the qualitative papers. This grade is used in qualitative analytical techniques to determine and identify materials. It is also extremely efficient in retaining very fine particles. Grade 301 is generally used for biological products, water analysis, soil analysis and fine precipitates such as cold precipitated barium sulfate. Grade 301 is additionally utilized with Buchner funnels and to clarify cloudy suspensions and wine. -
Grade 302 is a thick smooth paper, suitable for the removal of fine particles. This paper is made with 100% pure cellulose fibres that have been strengthened to resist the pressure when they are used in filter press systems. There is therefore no contamination danger during transfer steps. This high absorbency grade is twice as thick as Grade 301 with a bigger pore size. The extra thickness gives higher wet strength and loading capacity, enabling more precipitate to be held without clogging the filters and better handling. Grade 302 is also highly suitable for use in Buchner funnels and dye filtration.
-
This grade has a larger pore size than Grade 301, but with a lower filtration speed. Grade 303 also has higher absorption than Grade 301 is it used in general laboratory applications. Grade 303 is also found in agricultural and environmental laboratories for plant growth trials, soil testing and air analysis for monitoring specific contaminants and in the filtration of organic and sulfide precipitates.
-
This grade covers a wide range of laboratory applications and is used for clarifying liquids and for rapid filtration of coarser precipitates such as lead sulfate, lead chromate, calcium oxalate, calcium carbonate, aluminum phosphate, barium carbonate and beryllium hydroxide. Grade 304 can be found in soil analysis, seed testing and in air pollution to collect dust-laden air and is also commonly used in the food industry to separate foodstuffs from the associated liquid of extracting liquid.
-
This grade is used for the filtration of coarse particles and gelatinous precipitates such as ferric aluminum and magnesium hydroxides. Grade 305 is used in air monitoring and gas filtration when high flow rate is needed. This grade is also found in routine cleanup analysis of insoluble liquids such as biological fluids and organic elements.
-
SEPARA Syringeless filter is one step sample preparation device that integrates a device auto-sampler, filtration, membrane, plug and cap/septa. The device consists of two parts: an internal vial with a membrane chamber and an external vial to be filled with the filtrate. The internal vial has a sealed membrane and a cap with pre-cut septa. The liquid is placed in the external vial and the SEPARA is ready to be loaded in the auto-sampler. -
Features & Benefits • Excellent chemical compatibility • Quick, efficient assembly • No need for special tools • Excellent temperature and chemical resistance • Several syringe holders can be attached together for serial filtration -
Features & Benefits Durable - break resistant, no extra parts to break or wear out Uses a 47 mm depth filter disc One-handed operation Only two parts No clamps, wheel locks, or magnets to wear out Solid, stable and easy to use Applications • Filtering liquids for sterility • Particle removal • General filtration • Autoclavable -
Housing Material: Acrylic Ultrasonically welded Membrane Materials:Cellulose Acetate, PES, PVDF Membrane Diameter: 13 mm Housing Diameter: 18 mm Effective Filtration Area: 0.76 cm² Pressure Bar: 5 Sterile: No Inlet /outlet: FLL/MLL-MLS Holdup Volume: <50 microliter Maximum Operating Temperature: 50°C / 122°F Maximum Operating Pressure: 80 psi Sterile: Yes -
Effective Filtration Area: 4.6 cm² Sterile: Yes Inlet/outlet: FLL/MLL-MLS Housing Material: Acrylic Ultrasonically welded Membrane Materials: Cellulose Acetate, Nylon, PES, PVDF Membrane Diameter (mm): 25 Housing Diameter (mm): 33 Holdup Volume: <100 microliter Maximum Operating Temperature: 50°C / 122°F Maximum Operating Pressure: 80 psi -
Characteristics
Housing Material :Acrylic and Polypropylene Membrane Materials : Cellulose Acetate, Nitrocellulose, Nylon, PE, PES, PTFE, PVDF, Regenerated Cellulose Membrane Diameter : 13 mm Housing Diameter: 18 mm Effective Filtration Area: 0.76 cm² Pressure Bar: 5 Sterile: No Inlet /outlet: FLL/MLL-MLS -
Membrane Materials: Cellulose Acetate, Glass Fiber, Nitrocellulose, Nylon, PES, Polyethylene, PTFE, PVDF, Regenerated Cellulose Housing Diameter: 33 mm Membrane Diameter: 25 mm Effective Filtration Area: 4.6 cm² Housing Materials: Acrylic, Polypropylene Ultrasonically welded Inlet / Outlet: FLL / MLL-MLS Holdup Volume: <100 microliter Maximum Operating Temperature: PP Abluo - 90°C / 194°F, Acrylic Abluo 50°C / 122°F Maximum Operating Pressure: 80 psi
-
GVS CA Filtration membranes are composed of pure cellulose acetate that is internally supported by an inert polyester web. This web gives each membrane exceptional strength to prevent cracking, tearing, breaking and distortion when handled or creased. The resulting membrane has dimensional stability that can withstand autoclaving or steam sterilizing leaving the membrane unaffected in temperatures up to 274ºF (135ºC). The exceptional dimensional strength and low binding characteristics of GVS CA Filtration Membranes provide higher throughputs than competitive offerings and reduce the number of filter changes needed during proteinaceous solution filtering. -
GVS Life Sciences MCE Filtration Membranes are composed of a mixture of inert cellulose nitrate and cellulose acetate polymers. The uniform microporous structure of these filters provides the fastest flow rates and highest throughputs available in a membrane filter. Because they are biologically inert, GVS Life Sciences MCE Filtration Membranes are ideal for a wide range of clarification, sterilization and analytical applications such as: microbiological analysis, clarification or sterilization of aqueous solutions, industrial hygiene applications, silt density index and particulate-matter analysis. For gravimetric analysis using ashing techniques, GVS Life Sciences MCE Membranes yield a residue or less than 0.045% of their initial weight. They are hydrophilic with a noncytotoxic wetting agent and yield extractable levels of less than 4% of their weight. These membranes are autoclavable at 121°C (250°F) for 20 minutes. Sterilized product lifetime is 24 months from sterilization date. -
This strong, microporous film asymmetric membrane is constructed from a high-temperature polyethersulfone polymer that is acid and base resistant. Its strength and durability are advantageous during usage that involves aggressive handling or automated equipment. GVS PES Filtration Membrane is naturally hydrophilic without added wetting agents and has low extractables. Due to its inherent uniform porosity and controlled pore size, GVS PES Filtration Membrane efficiently removes particulates from solutions during general filtration. Additionally, its low protein and drug binding characteristics maximize recovery of critical drugs used in I.V. therapy, chemotherapy, and open-heart surgery.
We have retired the old website, please let us know if you encounter any issues here
Tel: +65 6777 7077
Email: marketing@hcs-lab.com
Tel: +65 6777 7077
Email: marketing@hcs-lab.com
Get in touch with us today for any inquiries, assistance, or collaborations. We’re here to help!
Copyright ©2026 | HCS Scientific & Chemical All Rights Reserved
