Thomas Welch 2534C-02 Standard Duty Dry Vacuum Piston Pumps, 28 L/min

The N 840.3 FT.40.18 is a two-stage pump with an integrated “self-drying” system for automatic conde (more)nsate drain. The “SD” series is widely used in laboratories, especially when the vapors are humid and a clean and ecological vacuum is required. Typical applications are: vacuum ovens (for drying chemicals, drying biological samples, heat treatments), autoclaves for sterilizing instruments, containers, filters and textiles. Thanks to the use of anti-corrosion materials, it is possible to vacuum even corrosive products. The heart of the pump is the diaphragm with differentiated structure in PTFE, optimized to guarantee high performance with reduced dimensions and at the same time, long life even in heavy applications. When the humid gases are sucked in, it can happen that condensation forms in the pump head: consequently the performance decreases, considerably increasing the emptying time. To eliminate condensation, the 'drying system' then opens a solenoid valve that allows ambient air to enter the heads. Once the condensation has been eliminated, the solenoid valve closes and the pump sucks from the stove in full capacity. Over time, condensation could form again and then the cycle is repeated. The time interval between one cycle and the next can be adjusted as desired, as well as the duration of the air injection. Technical features Flow Rate (max.) 34 l / min Ultimate Vacuum (max.) 10 mbar (abs.) Pressure (max.) 1 bar (rel.) Permissible Medium Temperature 5-40°C Valve Material FFPM Diaphragm Material PTFE coated Pump Head Material PTFE Applications Rotary evaporation Vacuum oven Qualitative characteristics Clean operation, 100% oil-free Corrosion resistant PTFE / FFPM flow path Ideal for extremely aggressive / corrosive gases and vapors Compact, silent and reliable The self-drying system removes condensation without altering the vacuum level Maintenance free Download the data sheet for further information and accessories. NOT SURE WHICH VACUUM PUMPS YOU NEED? Try following our guide to KNF pumps: VACUUM PUMPS FOR THE LABORATORY Or download the KNF guide: THE IDEAL DIAPHRAGM PUMP FOR EVERY APPLICATION

The offered instrument / system is fully functional tested and ready to use. FURTHER DETAILS TO FOLL (more)OW

The BVC control serves for efficient and convenient aspiration of supernatants. The vacuum level – a (more)nd thus the suction force – is exactly adjustable by the electronic touch panel and allows a sensitive and reproducible operation. The chemically resistant diaphragm vacuum pump is automatically turned on and off as needed, which reduces the low noise level even further. The BVC control is available in two complete equipment options with different collection flasks. The 2l borosilicate glass bottle with a protective coating has a very high chemical resistance. For larger amounts of liquids the 4l bottle of unbreakable polypropylene (PP) is used (included). The smooth surfaces allow an easy cleaning of the systems. Max. pumping speed: 0.7 m³/h Ultimate vacuum: 150 mbar Vacuum controller: Touchpanel Control range: 150 – 850 mbar (adjustable) Collection bottle: 4l Polypropylene Max. back pressure: 1.1 bar Dimensions (LxWxH): 408 x 194 x 500 mm Weight: 7.7 kg

Bio-Rad offers a range of mini horizontal electrophoresis chambers to resolve DNA fragments on eithe (more)r handcast agarose gels or ReadyAgarose precast gels. These cells include a buffer tank, safety lid with cables, and leveling bubble. Fast and flexible, the Mini-Sub cell GT cell is our most popular classroom gel box. The Mini-Sub cell GT cell holds either a 7 x 7 cm or a 7 x 10 cm gel tray. A 10 cm agarose gel poured with two 8-well combs easily accommodates two student teams at a time. At 100 V, this cell resolves DNA fragments from 20–20,000 base pairs in just under 30 min. Cell size (WxLxH): 120 x 260 x 65 mm Gel tray sizes (OD) (WxL): 70 x 70 mm ReadyAgarose gels accommodated: Yes, mini format Sample throughput: 8–30 Base buffer volume: ~270 ml Buffer recirculation: No Bromophenol blue migration: 4.5 cm/hr (at 75 V)

Polarimetry is an important technique for the investigation and analysis of optically active substan (more)ces. Common applications include: Characterization of newly synthesized compounds Quality control of pharmaceutical drugs Precise quantitative analysis of sugars Selective detection of optically active components by HPLC Monitoring and control of enzymatic reactions Principle: Automatic precision Polarimeter with optical null principle by rotation of the analyzer; automatic gain control. Radiation: Na spectral lamp Spectral lines: Selectable from instrument keypad (Na 589 nm) Apertures: Selectable apertures for standard cells and microcells. Detector: Photomultiplier 1P28A. Polarizer and analyzer: Vis-transmitting polarizers Rotatory range: ± 85° Balancing speed: 1.3°/s at 50 Hz; 1.5°/s at 60 Hz. Accuracy: ± 0.002° for rotations ≤1º; ± 0.2% for rotations >1° Reproducibility: Better than 0.002° (for zero and rotational reading). Internal angular resolution: 1 x 10-4 º Integration times: 0.1s, 0.2s, 0.5s, 1s, 2s, 5s, 10s, 20s, 50s and 100s. Autozero setting: Electronically from instrument keypad at any desired position in the rotatory range. User interaction: Either menu-driven from integrated touch-keys (English, German, French, Spanish and Italian), or PC-controlled from POL WinLab or POL WinLab ES software. Display: Stand-alone operation: vacuum fluorescence display, two lines with 20 characters each. Format of results: Selectable from instrument keypad – angular rotation, specific rotation, molar rotation, international sugar scale, user-defined scale with factor and offset. Dimensions (WxHxD): 825 x 310 x 390 mm Weight: 40 kg

The offered instrument / system is fully functional tested and ready to use. FURTHER DETAILS TO FOLL (more)OW

The offered instrument / system is fully functional tested and ready to use. FURTHER DETAILS TO FOLL (more)OW