$25 - $50

*Please note we can only ship RKI products to customers within the United States

WD-05942-22 Buffer Solution, pH 4.01; 1000 mL by Oakton

Ideal for laboratory and field analysis

• All Oakton pH buffers are traceable to NIST standard reference materials
• Buffer solution lets you calibrate pH instruments to ensure accuracy
• If unopened, shelf life is 2 years
• NIST/USA buffer value of pH 4.01

*Please note we can only ship RKI products to customers within the United States

97152-16 Traceable® Digital Caliper with Calibration, Carbon Fiber; 0 to 4" by Digi-Sense

Traceable® Products have an individually-numbered Traceable® Certificate provided with each unit, that assures accuracy from our ISO/IEC 17025:2017(1750.01) calibration laboratory accredited by A2LA. It indicates traceability of measurements to the SI units through NIST or other recognized national measurement institutes (NMI) that are signatories to the CIPM Mutual Recognition Agreement. Each product goes through an intense vetting process before it can carry the Traceable name, thus saving you both time and money by not having to calibrate separately.

This caliper does not measure depth, nor does it have a friction thumb roller.

• Measure inside, outside, step; adjustable zero, inch/metric conversion
• Includes NIST-Traceable certificate from our A2LA accredited (1750.01) calibration laboratory
• Designed with 0 to 4" range with 0.001" resolution and ±0.01" accuracy

Includes:

NIST-traceable calibration certificate with data.

*Please note we can only ship RKI products to customers within the United States

*Please note we can only ship RKI products to customers within the United States

SCT-108.003.A5 Plastic Three-In-One Combination pH Electrode by ScichemTech

• Plastic three-in-one combination pH electrode
• Simultaneous measurement of pH and temperature
• Automatic Temperature Compensation
• BNC + RCA Plugs

*Please note we can only ship RKI products to customers within the United States

*Please note we can only ship RKI products to customers within the United States

*Please note we can only ship RKI products to customers within the United States

C-9010 Silica Comparator (flat) by AquaPhoenix

C-9010 High Range Silica Comparator is a component of K-9010 Silica CHEMets Visual Test Kit and is designed to be compared against the color formed in R-9010 Silica CHEMets Refill. The comparator's range is applicable to many industrial applications. Color standards are blue in color and cover a range of 1-10 ppm SiO2.

*Please note we can only ship RKI products to customers within the United States

93666 Large SCT & EdgeHD Adapter V2 for Off-Axis Guider by Celestron

Produce a larger area of illumination for your 9.25", 11" or 14" Schmidt-Cassegrain or EdgeHD telescope by using the this adapter. When this adapter is paired with our Off-Axis Guider, these two imaging accessories allow you to use the full image circle in our larger scopes. This configuration is especially helpful to owners of larger format cameras, such as the Canon 5D or 6D, since their full frame can take advantage of the more substantial area of illumination produced by larger optical tubes.

What's New!

The Large SCT & EdgeHD Adapter V2 for Off-Axis Guider has a longer optical length—38mm. The adapter's longer length provides DSLR cameras back-focus spacing for Schmidt-Cassegrain and EdgeHD optical tubes in conjunction with the Off-Axis Guider without the need for extra adapters or spacers.

Body

The Large SCT & EdgeHD Adapter V2 for Off-Axis Guider is machined aluminum black anodized. The internal surfaces are sandblasted to help prevent glare and provide the highest contrast. The adapter has a knurled surface providing a great gripping surface for threading and unthreading.

• Custom-designed adapter works in conjunction with the Celestron Off-Axis Guider to produce a larger area of illumination when imaging through larger Schmidt-Cassegrain & EdgeHD telescopes
• NEW! Longer length to better accommodate DSLR back-focus spacing without the need for extra adapters
• Great for larger format cameras like the Canon 5D or 6D–allows use of the full image circle for better illumination of the sensor
• Achieve the highest contrast with the adapter's black anodized aluminum construction
• Knurled surface provides a convenient gripping area for threading and un-threading the adapter from the telescope

*Please note we can only ship RKI products to customers within the United States