$150 - $200

Part Number: 221L-351

Old Part Number: Z11145N
New Part Number: Z11145PN

Part Number: 58L-176-1.05

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

21061 Astromaster 70AZ Telescope by Celestron

If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.

The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.

• Quick and easy no-tool setup
• Permanently mounted StarPointer
• Erect image optics - Ideal for terrestrial and astronomical use
• Quick release dovetail attachment - no tool setup
• Pan handle Alt-Az control with clutch - for smooth and accurate pointing
• Rugged pre-assembled tripod with 1.25" steel tube legs - Provides a rigid and stable platform
• All coated glass optics for clear, crisp images
• Deluxe accessory tray for convenient storage of accessories
• BONUS Astronomy Software download with a 10,000 object database, printable sky maps and 75 enhanced images

Part Number: 44L-175-5

Part Number: 221L-344

LabSen 823 Glass Combination pH/Temp. Electrode for Dairy Products and Liquid Food by Apera

Backed by proprietary Swiss sensor technologies and materials, the LabSen® 823 Glass Combination pH/Temperature Electrode/Probe is designed for testing pH for dairy products such as milk, cream, yogurt, and other liquid food such as mayonnaise, jam, BBQ sauce, syrup, etc.

Silver Ion Trap Reference System+Protelyte Electrolyte - The LabSen 823 pH/Temperature Electrode/Probe adopts a Silver Ion Trap reference system and Protelyte reference solution. On top of the Long-Life reference system, a silver ion trap is added to prevent the junction from being blocked or contaminated by proteins.

LabSen unique blue hemispherical glass membrane - faster response time, better repeatability, and built tough, highly resistant to general impact (totally differentiates from the traditional fragile glass bulb membrane); and can be tested in high-temperature samples (up to 225°F).

Patented pH/Temperature combination structure - The temperature element is placed in an independent cavity under the pH glass membrane. With the built-in heat conducting medium, the temperature sensing speed can be increased by 40%, hence the response time and stability of the pH electrode are greatly improved.

Compatible with Apera Instruments' meters such as PH700, SX823-B, MP511, PH800, and PC800. May NOT work with other brands' meters because the temperature unit might be incompatible.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Proprietary pH sensor technology and materials from Switzerland
• Designed for milk and other liquid food that contain proteins
• Silver Ion Trap Reference System + Protelyte reference solution, preventing the electrode from being contaminated by proteins
• Patented pH/Temperature combination structure, increasing the temperature response time by 40% compared to a conventional isolated built-in thermistor
• Unique LabSen hemispherical glass membrane, which has a faster response rate, better repeatability, and built tough

Si-VV3 Vane Thermo-Anemometer by Sauermann

The palm-sized Sauermann Si-VV3 vane thermo-anemometer easily measures airflow, air velocity & temperature with its vane probe.

• Air velocity and airflow meter
• Large vane probe with 2 m (78.74") cable
• Backlit LCD screen
• Magnetic backing for easy fixing + Carrying bag

Kit Includes:

• 1 Certificate of conformity
• 1 Quick Start Guide
• 3 alkaline batteries LR03 AAA 1.5 V
• 1 Carrying bag

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