$200 - $300

Old Part Number: Z107925MX
New Part Number: Z107925PM6

610-0050-002 4-Gas Mix 50 CO, 5 SO2, 50%LEL, 20.9% O2 by RAE Systems

Green cylinder technology not only saves the environment, it also saves time and money.

• Gas cylinder size options 34, 58 and 116 liter
• Green Refillable cylinder
• "Strip and Ship" program for easy return of empty cylinders
• Small cylinder footprint
• Cylinder technology offers exceptional gas stability
• All gas cylinders use the same valve

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

MA885-BOX Digital Refractometer for Wine and Grape Product Measurements by Milwaukee

The MA885 is optical instrument that is based on the measurement of the refractive index of a solution. The measurement of refractive index is simple and quick and provides the vintner an accepted method for sugar content analysis.

Samples are measured after a simple user calibration with steam distilled water (starter bottle provided with your unit).

Within seconds the instrument measures the refractive index of the grape. This digital refractometer eliminates the uncertainty associated with mechanical refractometers and is easily portable for measurements in the field.

The instrument utilizes internationally recognized references for unit conversion and temperature compensation.

Temperature (in °C or °F) is displayed simultaneously with the measurement on the large dual level display along with icons for Low Power and other helpful message codes.

Key features include:

• Dual-level LCD
• Automatic Temperature Compensation (ATC)
• Easy setup and storage
• Battery operation with Low Power indicator
• Automatically turns off after 3 minutes of non-use
• Single-point calibration with steam distilled water (starter bottle provided with your unit)
• Waterproof models offers IP65 waterproof protection
• Quick, precise results readings are displayed in approximately 1.5 seconds
• Small sample size as small as 2 metric drops

Panel Fan Beam Mount Kit, W8x18 Beams

Part Number: F105325PM93

22451 StarSense Explorer LT 80AZ Smartphone App-Enabled Refractor Telescope by Celestron

Celestron has reinvented the manual telescope with StarSense Explorer—the first telescope that uses your smartphone to analyze the night sky and calculate its position in real time. StarSense Explorer is ideal for beginners thanks to the app's user-friendly interface and detailed tutorials. It's like having your own personal tour guide of the night sky.

Dock, Launch, Explore

Leave complicated star charts, imprecise planetarium apps, and computerized mounts behind. With StarSense Explorer, locating objects has never been easier, faster, or more accurate. Within minutes of setting up the telescope, you'll be navigating the sky with confidence. Simply place your phone in the unique StarSense dock and launch the StarSense Explorer app. After aligning your phone to the telescope's optics (a quick, 2-minute procedure), StarSense Explorer generates a list of celestial objects currently visible. Make your selection and arrows appear onscreen, guiding you as you to move the telescope. When the object is ready to view, the bullseye turns green.

Smartphone Compatibility

StarSense Explorer works with most modern smartphones, including iPhone 6 and up and most devices running Android 7.1.2 or later manufactured since 2016.

Patented StarSense Sky Recognition Technology

StarSense Explorer uses patented technology and your smartphone to determine exactly where the telescope is pointed in the night sky. A Lost in Space Algorithm (LISA), like the ones satellites use in orbit to correctly orient themselves, helps the app match star patterns it detects overhead to its internal database.

While other astronomy apps may claim that they can help you find objects, they rely exclusively on the phone's gyros and accelerometers, which aren't as accurate as LISA technology. No other app can accurately tell you when your target is visible in the eyepiece.

Sturdy Altazimuth Mount

StarSense Explorer LT's simple altazimuth mount makes it easy to move the telescope to find your target. An altitude slow motion adjustment with a sliding rod helps you fine tune the telescope's pointing position and follow targets as they appear to drift across the night sky. It's all anchored by an adjustable, full-height tripod.

Dazzling Views with High Quality Optics

You can expect sharp, bright views through this 80mm refractor. Fully coated glass optics provide increased light transmission, enhancing details in celestial objects. The telescope also includes a 90-degree erect image diagonal, so you can use it during the day to view birds, wildlife, landscapes, and more.

Perfect for the City or Dark Sky Sites

Even if you live in a light polluted city location, StarSense Explorer is advanced enough to be able to pick out Jupiter, Saturn, Venus, the Orion Nebula, double stars, and a few more of the most famous celestial objects.

But if you can take the telescope to an even slightly darker location, more objects will become visible. The entire telescope kit weighs just 9.2 pounds, so it's perfectly portable and easy to bring on your next camping trip or to a remote observing site.

Everything You Need to Observe Immediately

When you unbox your new StarSense Explorer LT, you'll find:

• 80mm refractor optical tube
• StarSense dock for your smartphone
• Low powered (25mm) and high powered (10mm) eyepiece
• 2x Barlow lens to double the power of each eyepiece
• 90-degree erect image diagonal
• StarPointer red dot finderscope, perfect for using the telescope during the day or without the StarSense Explorer app
• Altazimuth mount with slow motion control rod
• Full-height tripod with an accessory tray to keep you organized

• Unleash the power of your smartphone to take you on a guided tour of the night sky—no telescope experience required.
• Award-winning and patented StarSense sky recognition technology uses your smartphone to analyze star patterns overhead and calculate its position in real time.
• StarSense Explorer Powered by SkySafari™ app automatically generates a list of objects currently visible. View planets, brighter nebulae and galaxies, star clusters, and double stars from the city. Or take your telescope to darker skies to view faint, deep sky objects.
• Manual altazimuth mount with altitude slow motion adjustment with a sliding rod makes it easy to follow the on-screen arrows to your desired target. When the bullseye turns green, it's ready to view in the telescope's eyepiece.
• 80mm refractor with fully coated glass optics for bright, sharp views.
• Includes 25mm and 10mm eyepieces, 2x Barlow Lens, StarSense smartphone dock, erect image diagonal, a red dot finderscope (in case you want to use the telescope without your phone), and a full-height tripod.

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

WD-35661-00 DO300 Replacement DO Sensor Cap by Oakton

For your convenience, calibration standards, sensor heads, and sensor cartridges are available for your Oakton meters.

• Suitable for use with Oakton 300 series smart meters and meter kits
• Replacement DO sensor cap for 35660-96 and -98 DO sensors

Old Part Number: IM1055100
New Part Number: M1055100PA

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

Part Number: M10135VA

Part Number: M126550LM10

Part Number: M126550LM2

Part Number: F105310PM31

0638 1557 External Vacuum Probe for Testo 557 by Testo

This external vacuum probe for the testo 557 is designed to provide faster and more reliable evacuation measurements from 0 to 20,000 microns. This external vacuum probe features a secure connection, and is suitable for use on all refrigeration systems and heat pumps.