Bub­ble Vis­come­ters

BYK-Gard­ner bub­ble vis­come­ters are used to quickly deter­mine kine­matic vis­cos­ity of known liquids such as resins and var­nishes.

• The liquid stan­dards are sealed in glass tubes
• Shelf life is 15 years
• Sam­ple tubes can be cleaned quickly and eas­ily
• Tubes have no ori­fices that can be clogged to cause faulty mea­sure­ments
• Repeated read­ings may be taken eas­ily once the tem­per­a­ture has been con­trolled

The time required for an air bub­ble to rise is directly pro­por­tio­nal to the vis­cos­ity of the liquid – the faster the bub­ble rises, the lower the vis­cos­ity. BYK-Gard­ner bub­ble vis­come­ters come in let­tered tubes A5 through Z10 in four dif­fer­ent tube sets cov­er­ing vis­cos­ity ranges from 0.05 to 1,000 stokes.

Comes com­plete with:
Bub­ble Vis­come­ters:
Bub­ble tube stan­dards
Stor­age case
Two empty tubes
Oper­at­ing man­ual
Cer­ti­fied Sets come with cer­tifi­cate

Bub­ble Vis­come­ter A-T

Note: Indi­vi­d­ual replace­ment tubes can be ordered separately.

Bub­ble Vis­come­ter Pro­ce­dure

• Know­ing the approx­i­mate vis­cos­ity, pick four stan­dard tubes clos­est in vis­cos­ity to your sam­ple
• Fill the sam­ple tube with liquid, insert a cork, and then using the tube holder PV-0577, insert the four let­tered tubes and the sam­ple tube into the holder
• Turn over the holder and visu­ally com­pare what let­ter best matches the rise time of the bub­ble in the sam­ple
• The rise time in seconds of the sealed tubes and sam­ples can also be deter­mined using a basic timer

Please be aware of the fol­low­ing accu­ra­cies when per­form­ing the test:
Tem­per­a­ture con­trol: 1 °C = 10 % error
Ver­ti­cal­ity con­trol: 5° slant = 10 % error
Tube I.D. con­trol: 0.1 mm = 2 % error

Comes com­plete with:
Empty tubes in lots of 144 per pack­age includ­ing corks

ASTM D 1545 Timer Method
The tube has three amber ring marks at 27, 100 and 108 mm from the bot­tom. Fill the tube up to the 100 mm line, insert the cork down to the 108 mm line and turn the tube bot­tom up. Turn the tube around, start the stop watch when the air bub­ble crosses the 27 mm line and stop when the bub­ble crosses the 100 mm line.

Note: Amber mark­ings in per­ma­nent stain are located on the empty tubes for estab­lish­ing cor­rect bub­ble size.