$75 - $100

93623 1.25" Oxygen III Narrowband Filter by Celestron

The 1-1/4" OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects.

Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology.

*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

93481 Tabletop Tripod by Celestron

Eliminate the need for your full-height tripod and enjoy grab-and-go convenience when you add the Tabletop Tripod to your NexStar Evolution, NexStar SE, or Celestron Origin telescope. This compact and sturdy accessory is half the size and weight of a standard tripod, making it perfect for travel. The low-profile legs and wide footprint offer added stability, while the convenient tabletop design makes it easier for some observers (especially children) to access the eyepiece.

Setup is quick and easy compared to a full-height tripod. Simply place the Tabletop Tripod on a camp table, bench, tailgate, or any other flat surface. With a footprint of just 17.5" x 16", you can use it just about anywhere. Then, open and level the tripod legs, attach the mount and telescope, and you're ready to go.

The Tabletop Tripod has adjustable knobs on each leg and a bubble leveler on the mount plate to ensure your setup is level before adding the telescope. Just like the NexStar SE, NexStar Evolution, and Celestron Origin's standard tripod, the Tabletop Tripod has three captured screws on the underside of the mount plate so you can securely lock your mount and telescope in place.

When not in use, the Tabletop Tripod's legs fold inward and stow neatly under the mount plate for easy storage and transport.

• Miniature tripod perfect for using your telescope on an elevated surface such as a picnic table
• Provides a solid, sturdy base for your NexStar Evolution, NexStar SE, and Celestron Origin fork arm mount with telescope tube
• Features adjustment knobs and a bubble level to ensure the telescope is perfectly level even if the tabletop is not
• Three captured screws securely lock your mount and telescope to the tripod
• Tripod legs fold in for convenient transport

18520-00 Type K Thermocouple Probe Quick DisConnector, Dual with Std-Connector, 6" L, .250 Dia, Grounded Junction 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)

• Ideal for continuous monitoring
• Designed with 316 stainless steel sheath
• Response Time: 1.2 - 5 seconds or greater
• Includes a stand alone female connector for instalation to a thermocouple extension cable
• Each probe comes with a color coded ANSI dual standard connector: type J-black, type K-yellow, type T-blue, and type E-purple.
• Custom designs or changes to this product are available upon request

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

CC-0008-CI Corrosion Coupons: Cast Iron, Class 40 by AquaPhoenix

3" long × 1/2" wide × 1/16" thick. 3/16" hole 1/4" from end.

18520-23 Type T Thermocouple Probe Quick Dis-connector, Dual with Std-Connector, 12" L, .250 Dia, Exposed Junction 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)

• Ideal for continuous monitoring
• Designed with ICONEL 600 sheath
• Response Time: 1.2 - 5 seconds or greater
• Includes a stand alone female connector for instalation to a thermocouple extension cable
• Each probe comes with a color coded ANSI dual standard connector: type J-black, type K-yellow, type T-blue, and type E-purple.
• Custom designs or changes to this product are available upon request

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

90446-36 Probe Type-J 12" L Fiberglass Stainless Steel Pl by Digi-Sense

Magnesium Oxide insulated thermocouples, commonly referred to as MgO thermocouples, are used in many process and laboratory applications. Many desirable characteristics make them an excellent choice for general and special purpose applications. They are available in all thermocouple element types, single or dual elements, a wide variety of sheath diameters / materials, rugged in nature, bendable, and have fairly high temperature ratings.

• 316 stainless steel sheath