Original ProWeigh Filters TSS/VSS
ProWeigh® Original Filters are 1.5µm Binderless Glass Fiber Filters with all preparation steps done for you.ProWeigh® Original filters from Environmental Express are a time-saving and accurate way to perform Total and Volatile Suspended Solids. Use of prepared filters significantly reduces hands-on preparation time in your lab. Listed in Standard Methods since 1997, our laser cut 1.5µm binderless glass fiber filters are prepared according to method. Filters are:
- Washed 3 times in deionized water
- Dried at 103 - 105°C (ProWeigh Double filters for Volatile Suspended Solids are then ignited at 550°C for 15 minutes)
- Weighed to 0.1mg
- Placed in aluminum weigh pan
Pans are labeled with weights in print and barcode formats. ProWeigh filters are approved for Method 2540C: Total Dissolved Solids, Method 2540D: Total Suspended Solids, and Method 2540E: Fixed and Volatile Solids. To use ProWeighs, simply remove a filter from its pan, place it on a filter funnel and filter your sample. After filtration is complete place the ProWeigh filter back in its pan and dry in an oven for final weight determination.As an added convenience, complete data for each box of 47mm ProWeigh Original filters is available on our website, http://www.envexp.com/filterdata. Just type in your Box ID number (found on the product label on your box). The product data for all the filters in your box is populated on your computer screen.
Download your data into a CSV/Excel file with just one click. It's as simple as that. Your DoubleWeigh data will be stored in our system indefinitely. Access your data any time.
Original ProWeigh Filters for TSS
Original ProWeigh Filters for VSS
The pans are not weighed. According to the method the pans should only be used as support when drying the filters in the oven. Only the filter and residue should be weighed.
There is no certificate of analysis for the ProWeigh filters. There is a balance certification that is available. Go to http://www.envexp.com/coa and choose \"Balance Certification for Proweighs\" You will be able to download copies of our balance certifications there. We typically have the certification done in May.
The pore size on these filters is 1.5 microns. For pricing please login online or check with your sales representative.
I have a client who wanted to know the pore size of the F93442MM - ProWeigh Filters for TSS, 42mm, 100pk?
All ProWeigh filters are glass fiber, binder free, 1.5 micron pore size filters. They fit the specifications listed for TSS and TDS testing.
Yes - our glass fiber filters for TSS and TDS are equivalent to the Whatman Grade 934-AH.
All of our pricing is available online by logging into your customer account. If you need help setting up or accessing your account please call our toll free number 1-800-343-5319 and speak with our customer support team.
What is the nominal pore size of your F93447MM - ProWeigh Filters for TSS, 47mm, 100pk? Thank you, Greg
This filter has a nominal pore size of 1.5 microns.
This is a glass fiber 1.5 micron filter.
These filters have a nominal pore size of 1.5um.
The nominal pore size is 1.5 um.
Is this EPA approved? Are the weights of the filters traceble to a NIST source? and do you supply supportive documentation?
The EPA typically does not approve pieces of equipment, but instead approves methods. For total suspended solids, SM2540 D 1997 is one of the more commonly used approved methods. There is a footnote in the section detailing the filter specifications that mentions Environmental Express ProWeigh by name as being acceptable for use. Each box of filters that you receive is accompanied by a certificate that gives balance ID’s and weight set reference numbers that are used to weigh the filters.
If all you need is a preweighed filter, the ProWeigh would be your best option. A representative sample of these filters are double checked for proper weights instead of every filter as with DoubleWeigh. The volatile filters are only for use if the filter and the material on it are to be burned to remove volatile components. All of these filters have a pore size of 1.5 microns.
This filter is a 1.5 um, binderless glass fiber filter. It is specific to the Total Suspended Solids analysis but does have other applications.
All of the filters that are recommended by name in the footnote for Standard Methods 2540C have a listed pore size of 1.5 um. The size is slightly smaller than the maximum called for because every type of filter will allow some particles of a larger size to pass through. 1.5 um is a good size to get as close as possible without allowing too many large particles to pass through.
This documentation is not provided with the filters. The weight on the pan is the original weight of the filter and the secondary weight must be within +/- 0.0004g of the originial weight or the filter is rejected.
Can the pan ID# and filter weight be put in separate fields on an Excel spreadsheet if read with an imaging scanner?
Yes--this is possible. Customers have been successful in separating the two into different fields on an Excel spreadsheet or in their LIMS system.
Yes--the bar code contains both the filter weight and the pan ID #.