Standard ground stoppers

The hexagonal LABSOLUTE® hollow glass stoppers with standard ground joint and pointed bottom are made of high-quality borosilicate glass 3.3 and are therefore extremely temperature-resistant up to 500 °C. The stoppers comply with DIN 12252 form C. They are resistant to cold lyes/alkaline solutions and strong acids with the exception of hydrofluoric acid and concentrated, hot phosphoric acid. The stoppers can be easily combined with all glass products that have a ground joint such as measuring flasks, Erlenmeyer flasks or round bottom flasks.

The white, octagonal LABSOLUTE® stoppers are made of HDPE and comply with DIN 12254. They are the perfect complement to all laboratory glassware with a standard ground joint. The joint sizes 34/35, 45/40 and 60/46 are in addition to the standard.

Manufactured from borosilicate glass 3.3 which is resistant to heat and almost all chemicals. They meet the highest quality standards according to DIN 12252. Lower closed end of stopper features a "drip-tip" to ensure adhered liquid is returned to the flask. Hexagonal flat head prevents the stopper from rolling and allows stopper to be stood on end preventing contamination of the ground surface.

Acc. to DIN 12252, form C.

Stoppers manufactured to DIN standard 12242 ensuring an effective seal, even on non-standard surfaces.

Fits standard conical joints.

DIN 12252. Solid or semi-hollow, with octagonal grip.

DIN 12252. With octagonal grip.

Plastic stopper with NS 19, PPC, for Karlsruher BOD bottle

DIN 12252. With octagonal grip.

Highly accurate turbidity standards composed of suspended microspheres, suitable for Instrument calibration and control of all turbidity meters. Stable, shelf life of 2 years (from Date of Manufacturing). NIST traceable, US EPA approved and tested in compliance with ISO 7027. HDPE bottles of 100 ml.

Two ranges available:

• Ratio range for Ratio Turbidity Measuring instruments (measure of the scattered light from the sample at a 90° angle from the incident light, plus at additional angles (several detectors)
• Non Ratio for Non Ratio Turbidity Measuring instruments will measure the scattered light from the sample at a 90° angle from the incident light (one detector)

Hexagon stoppers for NS connections.

For closing glassware such as ground flasks or laboratory bottles. DG-joint quality.

With flat bottom.

Hollow, with sealing rings and square grip. Autoclavable (121 °C).

Octagonal. Suitable up to max. 80 °C.

Hollow, with sealing rings and octagonal grip.

Glass stopper for tight sealing of standard ground vessels, DIN 12 252.

Cap with red core. Autoclavable.

For closing glassware such as ground flasks or laboratory bottles. DG-joint quality.

Amber, honed.