$150 - $200

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

S653/25/CSC Cable Assembly, 25ft (7.5M), CSC by Sensorex

With threading for submersion mounting, the S653 Cable Assembly is the perfect complement to our S651CD Submersible Electrode series. This cable assembly is designed to submerge the electrode in tanks, flumes and sewer lines. The cost-effective CPVC construction is well suited for most water and wastewater applications. Pairing the S653 Cable Assembly with an S651CD series Electrodes allows for quick electrode changes, drastically reducing downtime due to maintenance.

• Use with one of our S651CD series Electrodes for quick and easy maintenance
• Threading design for fast and simple installation
• Durable CPVC design is suitable for most applications
• One year limited warranty

93527 2" Mirror Diagonal with XLT by Celestron

There are few telescope accessories that work as hard or matter as much as a diagonal! An integral part of the optical chain, a good diagonal can make a big difference in the quality of the image you see. A 2" diagonal is required if you want to use 2" eyepieces when observing with your telescope. The larger 2" barrel allows you to see a bigger percentage of the telescope's light cone, which works wonders for capturing faint deep sky objects with low surface brightness.

The Celestron 2" Mirror Diagonal was built for superior performance. The housing is machined with precision instruments to make sure the optics stay perfectly aligned. The diagonal's mirror is tested with an interferometer, and is guaranteed to be 1/10 wave or better. The mirror's surface is covered with the same high performance XLT coatings used on Celestron's best telescopes, and the result is a sharp, bright image that will satisfy the most discriminating amateur astronomer.

This 2" diagonal threads securely to the rear cell of standard Schmidt-Cassegrain telescopes. To take advantage of the XLT Diagonal's extra light throughput, insert a 2" eyepiece into the barrel. If you want to use 1.25" eyepieces, slide the included 2" to 1.25" adapter into the eyepiece barrel and secure it with the thumbscrew. When you're not observing, store your diagonal in the included aluminum case for protection.

• 2" SCT mirror diagonal with high performance XLT coatings.
• 1/10th wave mirror is tested with an interferometer to ensure quality.
• Housing is precision machined to achieve and hold good optical alignment.
• Includes a 2" to 1.25" adapter and aluminum carry case.

*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

90445-66 Low-Ranger TD, 3-Wire, 100 Ohm, 1/4" OD, 12" L, Al/SST, 0.1% by Digi-Sense

These RTD assemblies consist of a single Low Range or High Range Wire Wound element constructed of 316 Stainless Steel sheath material, assembled together with an Aluminum screw cover connection head.

• 316 Stainless steel sheath material
• 1/2"' X 1/2"' NPT stainless steel hex nipple for head mounting fittings
• Aluminum screw cover connection head
• Low range or high range wire wound elements
• .00385° C temperature coefficient
• Custom built assemblies available upon request

90445-65 Low-Ranger TD, 3-Wire, 100 Ohm, 1/4" OD, 6" L, Al/SST, 0.1% by Digi-Sense

These RTD assemblies consist of a single Low Range or High Range Wire Wound element constructed of 316 Stainless Steel sheath material, assembled together with an Aluminum screw cover connection head.

• 316 Stainless steel sheath material
• 1/2"' X 1/2"' NPT stainless steel hex nipple for head mounting fittings
• Aluminum screw cover connection head
• Low range or high range wire wound elements
• .00385° C temperature coefficient
• Custom built assemblies available upon request

S200CD-HT pH Electrode, double-junction, epoxy body, high temperature, 12 mm dia, 150 mm L by Sensorex

This series of electrodes is designed to provide an economical multi-purpose solution for in-line or submersion pH measurements. Based on our proven S200C bulb and S350CD flat surface pH glass technology, these rugged and durable electrodes are available in Ryton nipples with 1/2" or 3/4" NPT threads; or in our durable epoxy body with or without quick disconnect top caps.

Choose from single or double junction designs, flat or recessed measuring surface configurations and cable lengths and connectors as required.

• Economical design for in-line or submersion use
• Choose from single or double junction models
• Threaded 1/2" or 3/4" NPT connections
• Choose from spherical or flat pH measuring surfaces
• Special models for low ionic and other specialty applications available

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

Part Number: J126550LM6

82052 Regal Premium Tripod by Celestron

The perfect tripod should be stable yet lightweight and easy to operate, requiring minimal knob twisting and lever flipping. The Celestron Regal was designed to be your perfect tripod. It is lightweight (6.04 lb.) and compact, yet it can hold up to almost 9 pounds of equipment.

The Celestron Regal Tripod is topped with a two-way fluid pan head. The single handle makes it easy to move the head around, while two knobs, located on the same side of the head make it easy to adjust the tension of the pan and tilt. A quick release plate with standard 1/4-20 thread mount makes it easy to attach a spotting scope, binocular, camera, or small telescope to the tripod. The quick release plate also doubles as a balance rail allowing the optic to be balanced when attached to the tripod. For additional peace of mind the quick release plate has a safety mechanism which prevents it from sliding completely out of the pan head without pushing the release button.

The aluminum legs of the Regal Tripod are fully adjustable, not just in length, but in their angle as well. Each leg is made up of four sections that can be shortened or lengthened with the flip of a simple lever lock. This makes it easy to make the tripod a little taller or a little shorter as your terrain or needs change. Each leg can also be set to three different angles. If the place you need to set up your tripod is not perfectly flat, the ability to adjust the angle of one or more legs makes all the difference.

With the center column fully extended, the maximum height achieved is nearly 69 inches (59 inches with the column down). The center column of the Regal Tripod does more than just go up and down. The bottom end of the column holds a retractable balance hook. This simple device can make all the difference in the stability of your tripod, especially on windy days. Just hang something heavy from the hook like a backpack and you'll be amazed at the difference. When the hook is not needed, it retracts up into the center column to stay neatly out of the way.

Two of the legs come with padded wraps, providing protection for your shoulder when carrying and making it more comfortable to make adjustments during cold weather. The legs also feature retractable spiked feet with the ability to change from rubber to spiked feet if the terrain requires it with the simple turn of the rubber pad.

Other features include bubble levels, located on the top of the tripod as well as on the side of the pan head, and a carrying case. The case is the perfect place to store your tripod when not in use, and makes it easy to transport via the shoulder strap.

• Perfect support for a spotting scope, binocular, camera, or small telescope
• Sturdy aluminum tripod adjusts in height from just over 18 inches to nearly 69 inches and includes a two-way fluid pan head with quick release plate that doubles as a balance rail
• The four-section legs can be set to three different angles and use quick and easy flip lever locks for length adjustment
• The center column can be extended when additional height is needed. A retractable balance hook lets you add weight if extra stability is required.
• Tripod case and shoulder strap included