Burette with straight stopcock

burette (also buret) is a vertical cylindrical piece of laboratory glassware with a volumetric graduation on its full length

A burette (also buret) is a vertical cylindrical piece of laboratory glassware with a volumetric graduation on its full length and a precision tap, or stopcock, on the bottom. It is used to dispense known amounts of a liquid reagent in experiments for which such precision is necessary, such as a titration experiment. Burettes are extremely accurate - a 50 cm3 burette has a tolerance of 0.1 cm3 (class B) or 0.06 cm3 (class A).

Also used for buretting are buretting syringes. These are calibrated to Volumetric A grade tolerances which are equal to or better than the traditional burette tolerance. The graduated buretting tube is provided with a thumb operated piston and PTFE seal which slide within the tube in a positive displacement operation. This arrangement is provided to achieve improvements in reliability, by removing problems of bubble entrapment while filling, leaks and blockages in stopcock mechanisms.

1644B		BURETTE with blue line on milk white
		background,rubber tubing connection,
		glass bead and.glass tip
Cat. No	Capacity	Height	Capacity	Graduated	Quantity
			tolerance	interval	Per
	ml	mm	ml	ml	case
GS-1644B-01	10	600	0.05	0.05	120
GS-1644B-02	25	630	0.1	0.1	120
GS-1644B-03	50	860	0.1	0.1	120
GS-1644B-04	100	860	0.2	0.2	120
		BURETTE with blue line on milk white
1645A		background,straight stopcock
Cat. No	Capacity	Height	Capacity	Graduated	Quantity
			tolerance	interval	Per
	ml	mm	ml	ml	case
GS-1645A-01	10	600	0.025	0.05	60
GS-1645A-02	25	630	0.05	0.1	60
GS-1645A-03	50	860	0.05	0.1	60
GS-1645A-04	100	860	0.1	0.2	60
		BURETTE with blue line on milk white
1645B		background,straight stopcock
Cat. No	Capacity	Height	Capacity	Graduated	Quantity
			tolerance	interval	Per
	ml	mm	ml	ml	case
GS-1645B-01	10	600	0.05	0.05	60
GS-1645B-02	25	630	0.1	0.1	60
GS-1645B-03	50	860	0.1	0.1	60
GS-1645B-04	100	860	0.2	0.2	60
		BURETTE amber glass,with rubber tubing
1647A		connection,glass bead and glass tip
Cat. No	Capacity	Height	Capacity	Graduated	Quantity
			tolerance	interval	Per
	ml	mm	ml	ml	case
GS-1647A-01	10	600	0.025	0.05	120
GS-1647A-02	25	630	0.05	0.1	120
GS-1647A-03	50	860	0..05	0.1	100
GS-1647A-04	100	860	0.1	0.2	100
		BURETTE amber glass,with rubber tubing
1647B		connection,glass bead and glass tip
Cat. No	Capacity	Height	Capacity	Graduated	Quantity
			tolerance	interval	Per
	ml	mm	ml	ml	case
GS-1647B-01	10	600	0.05	0.05	120
GS-1647B-02	25	630	0.1	0.1	120
GS-1647B-03	50	860	0.1	0.1	100
GS-1647B-04	100	860	0.2	0.2	100
		BURETTE amber glass,with straight
1648A		stopcock
Cat. No	Capacity	Height	Capacity	Graduated	Quantity
			tolerance	interval	Per
	ml	mm	ml	ml	case
GS-1648A-01	10	600	0.025	0.05	60
GS-1648A-02	25	630	0.05	0.1	60
GS-1648A-03	50	860	0.05	0.1	60
GS-1648A-04	100	860	0.1	0.2	60
		BURETTE amber glass,with straight
1648B		stopcock
Cat. No	Capacity	Height	Capacity	Graduated	Quantity
			tolerance	interval	Per
	ml	mm	ml	ml	case
GS-1648B-01	10	600	0.05	0.05	60
GS-1648B-02	25	630	0.1	0.1	60
GS-1648B-03	50	860	0.1	0.1	60
GS-1648B-04	100	860	0.2	0.2	60

Burette with straight stopcock