$75 - $100, Oakton Instruments

WD-35661-70 Deluxe Testr Calibration Kit by Oakton

Ideal for plant and field uses.

Each kit contains TDS Singles calibration pouches (two each of 447 µS, 1413 µS, 2764 µS, 15,000 µS, and rinse water); sample jar; and screwdriver all in a hard shell carrying case with room for your TDSTestr (order Testr separately).

TDS Singles are handy, single use pouches that each contain 20 ml of fresh calibration solution. Accuracy is ±1% at 25°C.

• Protective carrying case organizes meter and materials
• Includes everything you need for convenient calibration
• Calibration standards are made with NIST traceable materials

WD-35653-09 10 µS Conductivity/TDS "Singles" Calibration Solution Pouch, 20 Pouches each with 20 mL of Solution by Oakton

Choose from economical solution bottles or individually sealed pH buffer pouches.

All Oakton pH buffer solutions are freshness dated, and standardized against NIST-traceable references to ensure quality. ±0.01 pH at 25°C.

OAKTON pH buffer solution bottles are labeled with the name and CAS number for all ingredients (for Right-to-Know requirements), and are supplied with an MSDS (Material Safety Data Sheet).

OAKTON pouches are convenient, air-tight pouches with high-precision calibration standards. Ideal for field use-take them to your test site for on-the-spot calibration. Each box contains twenty 20 mL pouches. Dimensions: 4.5"L x 5"W x 4.5"H (box). Shpg wt 1 lb per box.

• NIST traceable materials
• Labeled with pH vs temperature tables for accurate calibration