$15 - $20

HA6310-B Hydrochloric Acid, 10% v/v (1:9), 60mL by AquaPhoenix

• Hydrochloric Acid Solution/UN1789

Specifications

• Packaging Type: Poly
• Size: 60 mL
• Concentration: 10% v/v

PI8010-P Potassium lodide-lodate, 0.0079N (N/126), 500mL by AquaPhoenix

• Traceable to NIST

Specifications

• Packaging Type: Poly
• Size: 500 mL
• Concentration: 0.0079N

C-7404 Ozone Comparator (round) by AquaPhoenix

C-7404 Round Ozone Comparator is a component of K-7404 Ozone CHEMets Visual Test Kit and is designed to be compared against the color formed in R-7404 Ozone/Chlorine Dioxide CHEMets Refill. The comparator's range is applicable to many drinking water applications. Color standards are pink in color and cover a range of 0-0.60 mg/L Ozone.

SX-FAN Sensor Fan by Agrowtek

GrowControl™ sensors feature a sampling fan which draws approximately 6cfm continuously through the sensor redicing ambient error for continuous sensor accuracy.

• 24Vdc
• 6cfm

94038 AUX Power Cable for Smart DewHeater Controllers by Celestron

Optimize your setup to run smoothly and the way you want—even with a third-party (i.e., non-Celestron) computerized telescope mount. This cable provides power to the AUX ports on your Celestron Smart DewHeater Controller.

Plug this AUX port cable into one of your controller's 12V DC power outputs and one of its AUX ports. When you switch the controller on, the cable provides power to run accessories through the controller's other AUX port(s), such as the SkyPortal WiFi Module (for wireless PC connection) or the Celestron Focus Motor.

Note: If you already use a Celestron mount, you do not need to purchase this AUX port cable. The AUX cable connection to your mount already provides power to the AUX ports.

• Add this cable to use the Smart DewHeater Controllers' AUX ports when using a third-party (i.e., non-Celestron) telescope mount
• Provides power to the Smart Dew Heater Controllers' AUX ports so you can power additional telescope accessories

TDS15/P Conductivity Solution, 15ppm/23.8uS, 1 Pt. by Sensorex

TDS/Conductivity instruments and sensors must be calibrated together. For a single-point calibration, select the one solution that approximates the expected conductivity or ppm level of total salts. Mixed Salt standards are the most frequently used in the field to sample naturally occurring water sources, boiler feed water, or cooling tower water. Typical river water, well water, or lake water sample will contain a mixture of several different salts. Sensorex Mixed Salt standards simulate a "Natural" mixture of common salt compounds found in these sources. Sodium sulfate, sodium bicarbonate, and sodium chloride salts are blended to provide a representative value. There are certain applications where Single Salt Solutions are preferred. NaCl Solution is routinely used to calibrate instruments measuring Sea Water or brackish water samples. Reagent grade salt and high resistivity DI water is compounded for accurate results. KCI Single Salt Solution may be used with conductivity meters that read directly in Siemens or Ohms. KCI (potassium chloride) is established as an international calibration standard for conductivity measurement. Choose the conductivity calibration solution that is right for your application. CA Residents: Prop 65 WARNING(S)

93402 T-Ring for Nikon Camera by Celestron

A T-Ring is one of the first accessories you will need if you want to take pictures through a telescope or spotting scope. If you have a Nikon SLR or DSLR camera body, the Celestron Nikon T-Ring is the one for you.

In order to use the Nikon T-Ring, remove the lens from your camera, and attach the T-ring in its place, just as you would if you were mounting a lens. The telescope side of the t-ring has threads that will accept a variety of camera adapters, including the Celestron T-Adapter or Tele-Extender. The adapter you choose depends on the type of photography you wish to do.

You can take pictures of terrestrial and/or celestial scenes by using a simple T-Adapter to turn your telescope or spotting scope into a large telephoto lens. The #93633-A T-Adapter is the best choice if you own a Schmidt-Cassegrain telescope with standard rear cell threads. If you have a refractor, the Universal T-Adapter (#93625), with its 1-1/4" barrel insert, is available. There are also special T-Adapters for the EdgeHD optical system: one for the 8-inch EdgeHD (#93644) and one for the 9.25, 11, and 14-inch EdgeHD (#93646).

Prime focus photography is popular for short exposure images of terrestrial objects as well as celestial objects like the Moon.

If you need extra magnification beyond that which your Schmidt-Cassegrain telescope provides, a Tele-Extender (#93643) will allow you to insert an eyepiece inside the barrel before attaching it to the telescope. A Tele-Extender is used most often for high power images of the Moon and the planets.

• This Celestron T-Ring attaches to all Nikon SLR and DSLR camera bodies.
• Sturdy bayonet flange locks in place just like a lens, providing secure contact.
• Attaches to a variety of camera adapters and accessories via standard t-threads.

CS2500-P Conductivity Standard, 2500 μS/cm, 500mL by AquaPhoenix

• Traceable to NIST

Specifications

• Packaging Type: Poly
• Size: 500 mL

59-180-1M RG59/U, BNC Male to BNC Male, 15 feet by Test Products International

50 Ohm, 75 Ohm, 93 Ohm. TPI BNC to BNC coax cable assemblies include: RG58/U (molded and assembled), RG59/U and RG62/U.

Features

• UL Listed Cable: Ensures quality and consistency in the cable construction.
• Boot is molded to cable connector for added strength: Limits the amount of bending the cable is exposed to at the connector to prevent cable breakage.
• Gold center pins: Ensures that there is a high quality connection maintaining the best return loss in high definition applications.
• Machined Brass Connectors: Unlike die-cast connectors, machined brass connectors have more precise tolerances, strength and positive mating meaning low signal loss for precise video and data applications.
• Boot is molded to cable connector for added strength
• 95% shielding
• 80°F temperature rating
• Multiple lengths up to 100 feet
• Individually bagged

90260-43 Pocket Liquid-In-Glass Thermometer; -10 to 110C, Closed Metal Case, Organic Liquid Fill by Digi-Sense

These thermometers are ideal for use in laboratory, biology, chemistry, university, photographic, food/beverage, petrochemical, automotive, wastewater and many other general purpose applications. The protective plastic case protects these thermometers from accidental breakage during use and storage. The section of the case that surrounds the bulb has small openings for circulation. All DURAC Plus® thermometers feature markings that are permanently printed on the glass, blue spirit liquid that has a dark scale contrasts against a white background.

• Non-mercury blue spirit liquid
• Closed metal case

Includes

Rugged metal case with an eyelet at the top for easy suspension