$150 - $200

58ES-49-100 58 Liter Single Gas (100 PPM CO) Ecosmart Refillable Cylinder, Nitrogen Balance by Gasco

The NEW 58-liter refillable cylinder is a smaller package! 58-liter ecosmart cylinders hold pure and mixed gases. Filled to your specifications, this lightweight portable cylinder is easier to manage than the traditional bigger 58-liter.

Features & Benefits

• Refillable or Disposable
• Dynamic smaller package
• Holds pure and mixed gases
• Lightweight and portable
• Same capacity as a traditional
• 58-liter disposable cylinder
• Eliminates disposal fees and regulatory paperwork

MKLP36SO-6B Low Pressure Mist Kit with Shutoff for 36" Fans; 6 x 0.012" Nozzles, Black by Schaefer

Instantly convert your circulation fan into a misting fan with Schaefer low pressure misting kits. The misting kits can reduce air temperature up to 30°F with wind from a fan and standard water pressure from an ordinary garden hose. The kits are easy to use with push releasable connections and optional ball valve water shut offs. Available for fans of all sizes, Schaefer mist kits provide an easy economical solution for your evaporative cooling needs.

Features and Benefits:

• 1/4" black polyethylene tubing for durability and resistance to cracking
• Brass and stainless steel nozzles to atomize the water
• Push releasable nozzles and fittings for easy cleaning
• Optional ball valve for quick and easy shutoff of water supply
• Standard garden hose connection for water pressure, no additional power required
• Minimal water consumption, as low as 1.7 gallons per hour, for energy efficiency and low environmental impact.
• 8 foot water supply line connection from ring to base
• Two year warranty
• Made in the USA

Part Number: 103L-350

Part Number: 103L-241N-100

93433 Luminos 19mm Eyepiece by Celestron

The Luminos series eyepieces offer a wide 82° field of view in both high power and low power models, allowing you to make the most of your telescope, whether you own a short, fast refractor or a Celestron EdgeHD telescope. The optical set consists of six or seven elements (depending on the model) and is fully multi-coated for crisp, sharp views. All six Luminos eyepieces are parfocal, which means you can switch out eyepieces during observing sessions with little or no additional focusing required.

The Luminos eyepiece body is made of polished and anodized aluminum. A rubber grip runs around the equator of the eyepiece, giving you a secure grip and an easy method for raising and lowering the retractable eyecup. Simply twist the rubber grip to adjust the height of the eyecup. The insert barrel is threaded to accept filters.

• Enjoy wide 82° views with Celestron Luminos Eyepieces.
• Retractable eyecup pops up when you need it, drops down when you don't.
• Sturdy anodized aluminum barrels are threaded for filters.
• A rubber grip keeps the eyepiece securely in your hands, even when it's cold or you have gloves on.
• Other eyepieces in the Celestron Luminos Series include: 7mm - 1.25", 10mm - 1.25", 15mm - 1.25", 23mm - 2", 31mm - 2"

Part Number: 103L-154-30

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

MISC-P7-LT MiScope Premium 7" Case with Light Table by Zarbeco

The premium hard cases with 2 or 3 trays with custom inserts is a rugged, watertight, shockproof and dustproof case designed to safely hold your MiScope, USB cable, slim light table and other accessories (including filter wheel or live insect holder).

Premium 7" case (MISC-PC7) has two custom trays and can hold: MiScope, USB cable, light table, filter wheel or other accessory and flashlight. It will come standard with light table tray (MISC-P7-LT) or you can request tablet tray instead (MISC-P7-TH)

Part Number: 44L-99-25

This is the equivalent of the G0042-H25 from BW

Part Number: 58L-98-25

601A pH/mV Handheld Meter by Jenco

pH/mV handheld meter with manual temperature compensation and pH calibration via knobs and pH slope calibration potentiometer. Has LCD digital display, BNC connector, voltage recorder output and reference electrode pin. AC/DC Powered.

• Liquid crystal display readable under bright ambient conditions
• Three position rocker switch for pH off mv operations
• Recorder output
• All solid state design
• High stability
• Low drift
• Fast response
• Rugged carrying case
• UL approved ac line adaptor
• One conventional 9v battery
• Extra long battery life
• Battery low indicator

Part Number: 34L-150A-100

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