HANNA®' buffer solutions are prepared according to precise formulas and are standardized with a pH meter calibrated according to the NIST standards.
The 20 mL sachets are single-dose whereas, for more demanding applications, you may choose between packages of 230 mL, 500 mL, 1 Liter or 1 Gallon (3.78 L).
All pH 4 solutions show batch number, expiration date and the correlation table between pH and temperature. HI 5004, HI 6004, HI 7004L/C, HI 8004L/C and HI 70004C are supplied complete with certificate of analysis.
This buffer value is widely used in water purification plants, in the food industry and where ever the pH is expected to be slightly acidic.
Certificate of Analysis
NOTE: We don't ship to P.O Boxes, APO and Internationally.
Hanna Instruments products are manufactured in our ISO
9001 facilities, meeting the highest quality standards in
the industry. Hanna's high standards also apply should a
product be returned due to defects in material or
workmanship. Our extensive warranty extends up to three
years on some products. Limitations: Warranted products may
be returned for repair or replacement only at the discretion
of Hanna Instruments. In some circumstances, remedy may
constitute refund for the price paid for the product.
The warranty period commences from the original date of
sale to the user or a maximum of 18 months from factory ship
date. Warranty is valid only when the product is used under
normal conditions and in accordance with operating
limitations and prescribed maintenance procedures. The
express warranty stated previously is the only express
warranty given by Hanna to the end-user buyer. Hanna
expressly disclaims any warranties implied by law, including
but not limited to warranty of merchantability of fitness
for a particular purpose. Hanna shall not be liable for any
individual or consequential damages of any kind for breach
of any warranty, negligence, on the basis of strict
liability or otherwise. Hanna's warranty periods are:
HI 9828 Multiparameter
2 Years On Meter
1 Year On Sondes
6 Months On Sensors
2 years - HI 221 & HI 223
2 years - HI 901 & HI 902 (instrument only)
6 months - Burette & Pump Assembly
PCA 310, PCA 320 & PCA 330 â€กฐ 1 year on the unit
6 months on the electrodes
Extended warranty plan available.
2 years - HI 120, HI 110, HI 250, pH 300 series, HI
4000 series and HI 255 bench meters
2 years - Portable Meter (not including Pocket
6,000 + (and growing) factories in our existing network are eager to make it for you.
When it comes to selling in stock products, we are no difference from many other Internet retailers, but we take pride in going extra miles to do something special for you: Have some products custom made for you.
We cannot do everything, but we usually can accommodate a certain changes in product options such as color, size, material, or minor design twist. We primarily work with vendors or factories, not individual artist or craftsman. For custom made products, we usually only cater to bulk size order that meets the minimum quantity requirement of a single factory run. Don't be shy. Ask. What we can accomplish may surprise you!