• VST’s precision filters deliver consistent extraction performance over a wide range of concentration with reduced sediment
• Designed to extract properly as a ristretto, normale or lungo with minimal or no change in grind setting at a fixed dose
• Filters are matched for total square area to +/- 5% to ensure identical performance
• Holes are fabricated using a new micro-machine and finishing process
• 100% of holes are measured on every filter for min/max range limits on area and diameter to a precision of +/- 20 µm (individual QC report provided with every filter)
• All holes are measured for circularity, placement, square area and blocked holes
• Hole pattern is centered to +/- 1.0 mm and placement is oriented for uniform extraction throughout the entire puck
• Wide outlet angle to prevent filters from clogging, anti-wear design ensures uniform performance for life of product
• Improved structural integrity, will withstand deflection from pump cycling without premature fatigue failures

VST LAB Coffee/Espresso III Refractometer Features include:

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• Improved precision +/- 0.01%, improved accuracy +/- 0.03% in coffee range, +/- 0.05% in espresso range
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• Automatically averages multiple measurements and displays the resulting % TDS in 2-3 seconds
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• Advanced optical engine with 1024 element detector array and sapphire optics
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• Includes auto-ranging Coffee-Espresso % TDS Scale
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• 24-character easy to read back-lit display
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• Evaporation cover & ambient light shield
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• Easy-clean stainless steel sample well
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• Temperature stability function
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• Smart Zero-Set Software
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• Silicone armor jacket
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• Five languages
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\n
• VST's precision filters deliver consistent extraction performance over a wide range of concentration with reduced sediment
\n
• Designed to extract properly as a ristretto, normale or lungo with minimal or no change in grind setting at a fixed dose
\n
• Filters are matched for total square area to +/- 5% to ensure identical performance
\n
• Holes are fabricated using a new micro-machine and finishing process
\n
• 100% of holes are measured on every filter for min/max range limits on area and diameter to a precision of +/- 20 µm (individual QC report provided with every filter)
\n
• All holes are measured for circularity, placement, square area and blocked holes
\n
• Hole pattern is centered to +/- 1.0 mm and placement is oriented for uniform extraction throughout the entire puck
\n
• Wide outlet angle to prevent filters from clogging, anti-wear design ensures uniform performance for life of product
\n
• Improved structural integrity, will withstand deflection from pump cycling without premature fatigue failures
\n

\n
• VST's precision filters deliver consistent extraction performance over a wide range of concentration with reduced sediment
\n
• Designed to extract properly as a ristretto, normale or lungo with minimal or no change in grind setting at a fixed dose
\n
• Filters are matched for total square area to +/- 5% to ensure identical performance
\n
• Holes are fabricated using a new micro-machine and finishing process
\n
• 100% of holes are measured on every filter for min/max range limits on area and diameter to a precision of +/- 20 µm (individual QC report provided with every filter)
\n
• All holes are measured for circularity, placement, square area and blocked holes
\n
• Hole pattern is centered to +/- 1.0 mm and placement is oriented for uniform extraction throughout the entire puck
\n
• Wide outlet angle to prevent filters from clogging, anti-wear design ensures uniform performance for life of product
\n
• Improved structural integrity, will withstand deflection from pump cycling without premature fatigue failures
\n