Recirculation valves for bottle-top dispensers and digital burettes

With ceramic pistons. High precision, bottle-top dispensers adjustable in fixed steps for the reproducible dispensing of liquids. Declaration of conformity acc. to DIN 12600. With patented, high-purity, alumino-ceramic pistons and highly polished, DURAN® glass cylinders, guaranteeing continual durability and precision.no surface abrasionno sticking due to plastic swellingno thermal expansion problemsRatchet adjustment mechanism prevents accidental adjustment of the set volume. When not in use the pistons can be locked and the delivery tubes capped to prevent loss of reagent. The glass cylinders are encased in plastic for added safety and have a window for viewing the contents. Autoclavable up to max. 121°C/2 bar.inlet and outlet valves are easily replacedfully supported delivery jet prevents 'side fling' of reagentscrew-fixed, inlet suction tubeHigh-grade materials (ECTFE, DURAN® glass, FEP) are used throughout.Discharge valves and valve seats consisting of high-purity aluminium oxide ceramicSupplied with: complete with thread A 32 mm, 3 thread adapters (A 28, A 45, S 40), 1 screw-coupled suction tube, 1 discharge tube unit, one spanner for valve, with individual serial number and Single Calibration Report.

Bottle-top dispensers with a special design. A lifting spring provides automatic filling. When the piston seal is worn out, the entire dispensing unit can be replaced rapidly and easily.Volume selection with scalloped trackReplaceable dispensing cartridge with direct wiping piston sealseripettor® For dispensing alkaline, weak, dilute or non-oxidizing acids, buffer and vitamin solutions, culture media, agar nutrient medium, up to 60 °C, polar solvents such as ethanol, methanol, acetylacetoneseripettor® pro For dispensing alkaline, acids, buffer and vitamin solutions, culture media, agar nutrient medium, up to 60 °C, polar solvents such as ethanol, methanol, acetylacetone, UV-sensitive mediaScope of supply:Bottle-top dispenser, discharge tube, filling tube, spare dispensing cartridge, PP adapters GL 32, GL 38, S 40

The combination of a springless PTFE valve and PTFE piston with chemically resistant ETP O-ring enables dispensing of both organic reagents as well as bases, thus, eliminating the need to buy different dispensers for different applications. The improved design of the uniTOPDISPENS 2 bottle top dispenser including a re-circulation valve allows a smooth, precise and reliable bubble free dispensing without any loss of reagent. The specially designed bottle adaptor which permits a 360° rotation of the unit, the easy volume setting as well as the flexible delivery nozzle underline the user friendliness of this bottletop dispenser. Available in six volume ranges.Springless PTFE valve, PTFE piston with chemically resistant ETP O-ring enables high chemical compatibility Glass cylinder from borosilicate glass 3.3Re-circulation valve enables easy priming and bubble free dispensingSmooth, reproducible and effortless dispensing360° rotation possible due to specially designed bottle adapterFlexible and adjustable delivery nozzle provides dispensing angle flexibility to the userSpecially designed volume adjustment knob for quick and easy volume settingThe telescopic extractable intake tube can be easily adjusted to varying bottle heightsNozzle cap reduces contact with air and prevents drying and dripping if the tip cover is attachedFive bottle adaptors included (28 mm, 32 mm, 37 mm, 40 mm and 45 mm). Standard thread: 30 mm.Fully autoclavable at 121 °C, 15 psi for 10 to 15 minIndividually calibrated in accordance with ISO 8655 standards and each unit is supplied with an individualcalibration certificateYou can find the appropriate compatibility list on www.llg-labware.com in the Downloads section.3 years warranty

For strong acids (excl. HF) and aggressive chemicals. Visible dispensing process, dispensing piston made of PTFE-sleeved, solid glass, with additional sealing lip at the end of the piston to prevent acid fumes and odours from escaping. No metal springs in the valve block (no contamination of the dispensed liquid). With colour-coded handle inscriptions.Items supplied: Dispenser without reservoir bottle, 1 discharge tube, incl. 2 PTFE-adapters (GL 40+45), 1 PTFE suction tube.

New dispenser technology from Hirschmann laboratory apparatus, with ceramic pistons. ceramus® are a high-precision, bottle-top dispenser range for almost all liquids.Environmentally-friendly, reagent-saving, recirculation valvesTough, ceramic pistonsSimple, self-locking volume selectionWhen not in use, pistons can be locked and delivery tubes capped to prevent loss of reagent.Fixed interval graduations give excellent reproducibility45mm screw neck and adapters supplied allow use with a variety of reservoir bottlesSmooth-action piston minimises operator fatigue during serial dispensingHigh-grade construction materials provide long operational lifeautoclavable at 121°CSupplied with: ceramus® complete with thread adapters A 45mm, 3 thread adapters (A 32, S 40 Merck bottles and A 38), 1 screw-coupled suction tube, 1 discharge tube unit complete, 1 spanner for valve, with individual serial number and single calibration report.

The dispenser includes a ground glass plunger and is suitable for organic solvents.45 mm base threadIntegrated calibration systemAutoclavable at 121°C fully assembledScope of supply:Bottle-top dispenser, delivery jet and stopper, feed tube, 3 alternative adapters (25, 28, 32 mm for 1 and 2.5 ml versions; 28, 32, 40 mm for 5 and 10 ml version; 32, 38, 40 mm from 25 ml onwards), QC certificate, operating instructions

The dispenser is equipped with a PFA coated glass plunger, which prevents crystallisation.Large displaySingle hand volume setting32 mm base threadIntegrated calibration systemAutoclavable at 121°C fully assembledScope of supply:Bottle-top dispenser, delivery jet and stopper, feed tube, 3 adapters (28, 40, 45 mm), QC certificate, operating instruction

The bottle-top dispenser makes liquid dosing easy and secure.Analog volume displayQuickly adjustable dosing volumeVolume selection with interior scalloped trackSimple calibration adjustment with a supplied toolValve system - tight sealing without additional sealing ringsFilling valve, olive-shapedAutoclavable at 121 °CScope of supply:Bottletop dispensers Dispensette® S, DE-M marked, performance certificate, telescope filling tube, mounting tool, adapters made of PPRed color code, for dispensing aggressive reagents, e.g. concentrated bases and acids such as H3PO4, H2SO4 (except as HCl, HNO3and HF), saline solutions and a variety of organic solvents.

The bottle-top dispenser makes liquid dosing easy and secure.Analog volume displayQuickly adjustable dosing volumeVolume selection with interior scalloped trackSimple calibration adjustment with a supplied toolValve system - tight sealing without additional sealing ringsFilling valve, olive-shapedAutoclavable at 121 °CScope of supply:Bottletop dispensers Dispensette® S, DE-M marked, performance certificate, telescope filling tube, mounting tool, adapters made of PPFor a period of six years from the date of purchase, we offer a replacement service if repair is unprofitable. The defective unit can be exchanged for a new unit at a preferential price.