$25 - $50

K-6503 Manganese Vacu-vials® (0-30.0 ppm) by AquaPhoenix

This kit requires the use of a CHEMetrics Direct-Readout Photometer or a spectrophotometer capable of accepting a 13 mm diameter round cell. Instrument sold separately.

94018 Dew Shield DX for C6 & C8 by Celestron

The Celestron Dew Shield DX is an essential accessory that protects your optical tube in the field. It prevents excess moisture in the air from forming condensation on the corrector lens. A dew shield also helps block stray light from entering the telescope for better viewing and astroimaging. Use the Dew Shield DX on your 6" and 8" Schmidt Cassegrain, EdgeHD, and RASA (with single dovetail) optical tubes with confidence.

Construction

The Dew Shield DX provides a perfect, custom fit designed specifically for 6" and 8" Celestron optical tubes. The Dew Shield is built from durable PE plastic that is flexible but strong. Extra padding has been added at the tube attachment edge to create a stronger fit on the optical tube. The felt-lined interior absorbs any additional stray light and excessive moisture, creating optimal contrast when viewing and imaging. The large dovetail cutout has been made both wider- to accommodate a 4" wide dovetail rails, as well as deeper, to create a more solid connection with the optical tube.

Attaching the Dew Shield to your optical tube is easy thanks to the Velcro attachment points. Whether your optical tube is 6" or 8", simply adjust the Velcro for the correct fit.

Transportation and Storage

To save space when not in use, roll up your Dew Shield DX for easy transport and storage.

• Prevents dew from forming on your Schmidt-Cassegrain or EdgeHD corrector lens
• Fits 6" and 8" optical tubes
• Cutout accommodates telescope dovetail rails
• Felt-lined interior surface captures moisture and reduces stray light
• Rolls up for easy transport

CN9960-Q Conductivity Neutralizing Solution, 1L by AquaPhoenix

• Flammable Liquid/UN1993

Specifications

• Packaging Type: Poly
• Size: 1.00 L

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

CU6750-Q Copper Sulfate Solution, 2% w/v, 1L by AquaPhoenix

• APHA for Nitrogen (Nitrate), 4500-E

Specifications

• Packaging Type: Poly
• Size: 1.00 L

*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

TDS9523 Conductivity Solution, 9523ppm/10,000uS, 1Qrt by Sensorex

TDS/Conductivity instruments and sensors must be calibrated together. For a single-point calibration, select the one solution that approximates the expected conductivity or ppm level of total salts. Mixed Salt standards are the most frequently used in the field to sample naturally occurring water sources, boiler feed water, or cooling tower water. Typical river water, well water, or lake water sample will contain a mixture of several different salts. Sensorex Mixed Salt standards simulate a "Natural" mixture of common salt compounds found in these sources. Sodium sulfate, sodium bicarbonate, and sodium chloride salts are blended to provide a representative value. There are certain applications where Single Salt Solutions are preferred. NaCl Solution is routinely used to calibrate instruments measuring Sea Water or brackish water samples. Reagent grade salt and high resistivity DI water is compounded for accurate results. KCI Single Salt Solution may be used with conductivity meters that read directly in Siemens or Ohms. KCI (potassium chloride) is established as an international calibration standard for conductivity measurement. Choose the conductivity calibration solution that is right for your application. CA Residents: Prop 65 WARNING(S)

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

18526-16 Type T Economic Bolt On Thermocouple Probe #6 Screw with Mini-Connector, 12" Fiberglass Ext. Grounded by Digi-Sense

The temperature range is for the probe tip only. The handle material may be affected if the probe is rated higher than the handle depending on exposure time, application, and handle material. ABS handles are rated to 220°F (104°C); PVC handles are rated to 200°F (93°C); Stainless Steel handles are rated at 450°F (232°C); Mini Connectors are rated to 392°F (200°C).

• Available in #6 (M3.5) or #8 (M4) screw sizes and different lead lenghts
• Response Time: 2-4 seconds or greater
• Each probe comes with a color coded ANSI mini connector or stripped leads: type J-black, type K-yellow, type T-blue, and type E-purple.
• Custom designs or changes to this product are available upon request

90308-96 Irreversible 6-Point Horizontal Temperature Label, 331-379F/166-193C; 10/Pk by Digi-Sense

Labels are made up of a series of temperature-sensitive elements sealed between heat-resistant substrates with transparent windows. Each element changes color distinctly as its rated temperature is met or exceeded. The changes to the label are irreversible, providing a temperature history of the surface being monitored. The labels will not delaminate when removed, allowing them to be attached to an inspection report to serve as a permanent record. Ideal for use in the food, automotive, molding and metal working industries. Accuracy is ±1.8°F below 212°F and ±1°F above 212°F. Shelf life: 1 year after date of purchase.

• Used as a quick inspection tool that the product is in usable condition during the shipping and receiving process
• Save time and money due to costly recalls
• Self-adhesive design

*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