$75 - $100

WD-98768-24 7909 Replacement Cables for 90080-21 by Oakton

Choose from a wide range of communication cables based on your specific meter.

Convenient replacement parts in case your cables are lost or damaged

AI1112 pH/Cond. Calibration Solution Kit (pH 7.00, 4.00, 10.01), (1413μS, 12.88mS, 84μS) 8oz/bottle+storage solution 4oz+CalPod by Apera

The Apera Instruments AI1112 pH/EC Calibration Buffer Solution Kit includes three 8oz bottles of pH buffer solutions (pH 4.00, pH 7.00, and pH 10.01), three 8oz bottles of conductivity (EC) standard calibration solutions (1413 μS/cm, 12.88 mS/cm, 84 μS/cm), one 4oz bottle of 3M KCL storage solution for pH/ORP electrodes, plus one piece of Apera's unique CalBox, which helps users to organize all the solutions in one place and create no more mess in the calibration process.

All the buffer solutions are standardized against NIST certified references at 25°C (77°F). It's ideal for the calibration of all kinds of pH/conductivity meters. Since pH and conductivity value are affected by temperature, the temperature & pH/conductivity reference charts are provided on the bottle labels for reference. The 3M KCL Storage Solution helps keep the sensitivity and accuracy of your pH probes.

All the solutions are double-sealed, not subject to the DOT shipping restrictions. The expiration date is printed on the bottle. 2-year shelf life for the pH buffers, 1-year for the conductivity solutions.

Note: Store at room temperature and away from direct sunlight. Keep the bottle tightly closed when not in use. Keep out of reach of children.

• Standardized against NIST certified references at 25°C (77°F), ideal for the calibration of all types of conductivity meters
• Double-sealed, 2-year shelf life for the pH buffers; 1-year for the conductivity solutions.
• The expiration date and Temperature/pH reference chart provided for reference
• The 3M KCL Storage Solution helps keep the sensitivity and accuracy of your pH probes
• CalPod included for easy organization of solutions and streamlining calibration process

Part Number: H126510LM4

94307 AstroMaster Accessory Kit by Celestron

• This economical eight-piece eyepiece and filter accessory kit enhances the performance of your Celestron AstroMaster, or most any other telescope.
• Includes two 1.25" eyepieces, a 2X Barlow lens, three filters, a cleaning cloth, and a case!
• With two extra eyepieces and a Barlow lens, you get four different magnifications to choose from.
• A Moon filter helps block out some moonlight so you can see more lunar detail, and the two color filters (Red & Blue) highlight features on Mars, Jupiter, and Saturn.
• A plastic, hard carry case keeps everything safe in the foam-lined interior.

Get more enjoyment from your telescope with the Celestron AstroMaster Accessory Kit. Inside the plastic, foam-lined carry case you'll find these accessories:

• 15 mm Kellner Eyepiece - 1.25"
• 6 mm Plossl Eyepiece - 1.25"
• 2X Barlow Lens with T-threads - 1.25"
• #80A Blue Filter - 1.25"
• #25 Red Filter - 1.25"
• Moon Filter - 1.25"
• Microfiber Cleaning Cloth

Eyepieces - The 15 mm and 6 mm eyepieces can be used in any telescope with a 1.25" focuser. Each eyepiece is fully coated to improve light transmission and protect the optics. The 15 mm Kellner eyepiece offers a nice medium magnification view in most telescopes, and the 6 mm Plossl provides high magnifications, great for the Moon and planets, especially when seeing conditions are good.

2x Barlow Lens - Insert the 2x Barlow Lens between the eyepiece and the telescope and it doubles the magnification of any 1.25" eyepiece. That means the 15 mm Kellner included in this kit will double in power, effectively becoming a 7.5 mm eyepiece, and the 6 mm will provide the magnification of a 3 mm. Any other 1.25" eyepieces you already have will also work in this versatile accessory, giving you even more magnification choices. Remember, high magnifications do not always produce clear, sharp results, especially on evenings of poor or moderate seeing conditions. Experiment to find the magnifications that are best for you and your telescope. T-threads are machined into this Barlow lens, allowing a user to attach a DSLR camera with the addition of an optional T-ring.

Filters - Colored filters can be used to bring out certain details on a planet's surface or its cloud structure. Both planetary filters, as well as the Moon filter, can be used on any 1.25" eyepiece with the proper filter threads, so they are very versatile. Just screw one onto your eyepiece of choice and slide it into the focuser.

The #80A is a medium-blue filter that enhances the contrast of the cloud belts on Jupiter and the polar ice caps on Saturn. It also can be used to increase contrast on the Moon if you don't mind the color shift.

The #25 filter is a deep red color and is a good choice when you want to define the polar ice caps on Mars. It's also fun to use this filter when observing Jupiter. The #25 Red filter blocks quite a bit of light coming through your telescope, however, so it is best used on bright objects with larger aperture telescopes.

The Moon filter is one of the first accessories most new amateur astronomers buy, and for good reason! It helps block out a portion of the light the Moon sends into your eyepiece so that you can see details better. You can also try this filter on Venus; it helps you see the planet's phases.

Cleaning Cloth & Case: Keep the micro-fiber cleaning cloth stashed in your AstroMaster Accessory Kit case so that it will always be handy. It's much better to use a micro-fiber cloth on your optics than other wipes or tissue, as it does not leave a residue, and can be reused. Remember to blow or brush any dust particles off of your optics before rubbing them with the cloth.

The black plastic carry case has die-cut foam inside to protect and cushion your accessories. Keep each one in its appointed place when not in use and you'll keep them looking and performing like new.

Part Number: H197150LM35

18520-07 Type J Thermocouple Inconel Probe Quick DisConnector, Dual with Std-Connector, 6" L, .250 Dia, Ungrounded 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

PC60-DE Spare pH/Conductivity/Temp. Electrode (double-junction, gel inner solution) by Apera

The Apera Instruments PC60-E is the replacement probe for PC60-Z Smart Multi-Parameter Tester, also compatible with PC60 pocket pH/Conductivity Tester. Its dual sensor allows you to measure pH, conductivity, TDS, salinity, resistivity, and temperature at the same time. This probe features Apera's unique Brush-Resistant Platinum Black (BPB) Sensor, ensuring accurate Conductivity measurement in a wide range for general water solutions.

• Replacement probe for PC60-Z Multi-parameter Smart Pocket Tester, also compatible with PC60.
• Measures pH, conductivity, TDS, salinity, resistivity, and temperature simultaneously for regular water solutions.
• Double-Junction pH probe, suitable for dirty and complex solutions and extends service life by up to 80%.
• The unique blue glass bulb will never generate any air bubbles, making reliable pH tests easier than ever.
• Brush-Resistant Platinum Black (BPB) Sensor ensures accurate conductivity measurement in a wide range for general water solutions.

*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

PROEXBOX External Lockout/Alarm Box by Bluelab

Use to connect the Bluelab® Pro Controller™ to external switches, for example - a float switch or a greenhouse alarm system.

When these switches are activated, Bluelab® Pro Controller™ is placed in lockout mode, so no further dosing will occur until reset.

FV-8100-G Flask, Glass Volumetric Class A 100mL by AquaPhoenix

Flask with standard taper Polyethylene Stoppers / Machine-blown bodies sealed to heavy-beaded, heavy-tubing necks. High thermal and chemical resistance. Calibrated "To Contain" within Class A Tolerances. Necks are ground for standard taper stopper. Linear high-density, closed-bottom polyethylene stoppers. Stopper No. 13.

K-1520A Ammonia HR CHEMets® Test Kit (25-250 ppm) by AquaPhoenix

The K-1520A Ammonia HR CHEMets® Test Kit (25-250 ppm) comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): 30 HR CHEMets® ampoules, a color comparator, 1.0 mL syringe, 25 mL sample cup, and instructions.

Shelf life: Although the Nessler reagent is stable, its high alkali content attacks the glass ampoule. The resulting precipitate interferes with color comparison. The refill has a 5-month shelf life when stored in the dark and at room temperature. This shelf life can be extended by 18 months if the refill is refrigerated.

K-1520B Ammonia HR CHEMets® Test Kit (125-1250 ppm) by AquaPhoenix

The K-1520B Ammonia HR CHEMets® Test Kit (125-1250 ppm) comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): 30 HR CHEMets® ampoules, a color comparator, fixed volume pipet, 25 mL sample cup, and instructions.

This kit is applicable for wastewater, environmental, aquaculture or any application where high concentrations of ammonia may be found in water.

Shelf life: Although the Nessler reagent is stable, its high alkali content attacks the glass ampoule. The resulting precipitate interferes with color comparison. The refill has a 5-month shelf life when stored in the dark and at room temperature. This shelf life can be extended by 18 months if the refill is refrigerated.