$50 - $75

94223 CG-4 Polar Axis Finder by Celestron

Get some help polar aligning your Celestron Omni or CG-4 mount with the addition of the Polar Axis Finder. Install the finder into the polar finder port, located at the rear of the mount, and focus the eyepiece until the reticle is sharp.

The reticle is etched with a few recognizable star patterns to help you align your telescope. If you are using your telescope in the Northern Hemisphere, you will recognize the Big Dipper asterism on the reticle, as well as the familiar "W" of Cassiopeia. Use the Big Dipper to guide you in the spring and summer months, and Cassiopeia during the fall and winter. The North Star, Polaris, is also designated on the reticle, as is the NCP, or North Celestial Pole. Once you choose which star pattern to use, align your telescope so that the stars line up with the positions shown on the reticle, then move the telescope's azimuth and altitude adjustment controls to place Polaris in the crosshairs.

The Celestron Polar Axis Finder can also be used in the Southern Hemisphere. Four stars of the constellation Octans are etched in the reticle. Adjust your telescope until those stars line up as shown on the reticle.

• Polar align your Celestron Omni or CG-4 equatorial mount more easily with this Celestron Polar Axis Finder.
• Inserts into the polar finder port at the back of the mount.
• The easily identifiable star patterns of the Big Dipper, Cassiopeia & Octans are etched into the reticle, as well as Polaris & the North Celestial Pole, to help with alignment in the Northern or Southern Hemisphere.
• Eyepiece has focus adjustments for reticle clarity.

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

08077-94 Armored Liquid-In-Glass Thermometer, -40 to 120°F, 76 mm Immersion; Organic Liquid Fill by Digi-Sense

Ideal for use in application where thermometers needs added protection from minor shocks. Nickel/plated brass armor shell protects these thermometers from accidental breakage during use and storage. The armor case has a screw cap with ring top and viewing window; the lower section that surrounds the bulb has small openings for circulation.

Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered. Include statement of accuracy and a triangular-style antiroll fitting.

Armor shell absorbs shock and prevents thermometer damage

• Nonmercury blue spirit liquid
• Statement of accuracy included

TH4675-Q Thymolphthalein Indicator, 0.1% w/v, 500mL by AquaPhoenix

• Flammable Liquid/UN1993

Specifications

• Concentration: 0.1% w/v
• Packaging Type: Poly
• Size: 500 mL

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

SP4400-Q Acid Zirconyl-SPADNS Reagent, 1L by AquaPhoenix

• APHA for Fluoride, 4500-D
• Corrosive Liquid/UN1760

Specifications

• Packaging Type: Glass
• Size: 1.00 L