$50 - $75

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

51635 StarPointer Pro Finderscope by Celestron

Spend less time centering your target and more time stargazing with Celestron's new premium finderscope: StarPointer Pro. Traditional red dot finderscopes were originally created for shooting sports such as airsoftairsoft guns and shooting sports. StarPointer Pro was designed for astronomers by astronomers to provide the easiest experience locating celestial objects in the night sky. Whether you're new to the hobby or a seasoned amateur astronomer, you'll appreciate StarPointer Pro's thoughtful design features.

While a red dot can obstruct your desired target, StarPointer Pro projects two circular LED reticles. Just place your target inside the circles and it's ready to view in the eyepiece. The circles also serve as a measuring tool while starhopping. For added convenience, StarPointer Pro offers a 40 mm optical window with a large field of view.

StarPointer Pro attaches quickly to any telescope and secures with a dovetail connection and finger knobs. No screwdriver needed!

Get more out of every stargazing session with StarPointer Pro.

• Designed by astronomers for astronomers, this premium finderscope allows you to precisely zero in on your target
• Projects a dual-circle reticle, not a red dot that can obscure your subject
• Larger 40 mm optical window offers a wider field of view so you can acquire targets quickly and easily
• Brighter LED for easy visibility during the day
• Easy dovetail connection; no tools required

Part Number: P1013300PA

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

WD-00652-62 Traceable® One-Shot™ Conductivity and TDS Standard, 10 μS; 6 x 100 mL Vials by Oakton

• Oakton® Traceable® conductivity and TDS standards have detailed labels: KCl, NaCl, and 442 conversions, temperature corrections, and certified values referenced to 25°C-convenient!!
• Average accuracy at 25°C is ±0.25 microsiemens for 1, 5, 10 microsiemen (μS) solutions, or ±0.25% for all other solutions. The tested uncertainty is shown on the certificate, whichever is greater
• Conductivity options range from 1 to 200,000 μS/cm
• Individually-tested solutions are certified by the bottle - each bottle is analyzed for the best accuracy

METHODS SUPPORTED

Certified reference material meets test requirements for Federal, State, and local agencies, CAP, ASTM, NCCLS, CLSI, ACS, CLIA, AOAC, EPA, APHA, AWWA, WEF, USGS, USP, and ISO. Traceable® Conductivity Standards complies with and is essential for use in these official methods: AOAC 973.40, EPA 120.1, Standard Method 2510 (APHA, AWWA, WEF), ISO 7888, DIN 38404, ASTM D1125, USGS I-1780, USP 645, and for A2LA/NVLAP accreditations/ISO 9000 certifications. Material may be used to calibrate all conductivity meters and to determine all conductivity cell constants.

A2LA ACCREDITATION ISO/IEC 17025:2005 (1750.01)

To assure accuracy an individually serial-numbered Traceable® Certificate is supplied to indicate traceability to standards provided by NIST (National Institute of Standards and Technology) and/or a National Standards Laboratory. A2LA accredited certification provides the highest achievable level of quality assurance, documentation, and accuracy. Conductivity Standards are produced in an A2LA accredited ISO/IEC 17025:2005 (1750.01) calibration laboratory. Additional certifications include ISO 31 (certificate content) and ISO 35 (statistical analysis), plus ISO 9001 (certified quality manufacturer).

• All Oakton® Traceable® conductivity standards are NIST-traceable reference materials
• Supplied with a calibration report from an ISO 17034 and ISO 17025 accredited laboratory
• These standard solutions let you calibrate conductivity instruments to ensure accuracy
• If unopened, shelf life is one year; once opened, shelf life will vary by solution value
• Use when readings are expected to be around 10 μS/cm

INCLUDES

temperature compensation chart, TDS conversion chart, and NIST-traceable calibration certificate with data.

PBX-410 4-Port Sensor Manifold by Agrowtek

PBX sensor manifolds integrate water-tight gland fittings into a 1" PVC manifold for sensing pH, conductivy, ORP and water temperature inline with a recirculating pump. Compression glands have a rubber insert that clamps around the probes when tightened. Manifolds make it easy to install and remove probes for calibration and maintenance.

Available in 2, 3 or 4 port configurations. Max: 60psi, 30gpm.

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

WD-98768-22 Replacement Cable for 37804-13 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

0560 1111 Mini Penetration Thermometer with Extended Probe by Testo

The quick-action immersion/penetration thermometer is ideal for measuring the temperature in air, soft or powdery substances and liquids.

• Universally applicable
• The longer measurement tip of 213 mm is suitable for measurements in which the object is difficult to reach
• For measurement points which are very hot (from -50 to +250 °C)
• Discounts for larger order quantities

Includes:

Mini penetration thermometer with extended penetration probe, including protective tube with integrated clip, batteries and calibration protocol.

SXL-3 Optical Liquid Sensor, PWM by Agrowtek

Electronic optical liquid sensors are durable, have no moving parts and are easy to maintain. SXL sensors can detect fluid levels in tanks, flow in pipes, or leaks in drip pans when liquid touches the sensor tip. Wide voltage range and high current capacity makes the SXL sensor practical for TTL logic, industrial PLC or direct relay control applications. 1/4" NPT threading and removable wiring terminal block with pin-out cast into the hex head makes installation or replacement fast and simple. When the output is energized a red LED illuminates the sensor body giving a visual status indication. Available in 'wet-on' and 'dry-on' configurations, or PWM output for applications requiring error indication and failure monitoring. Other intelligent functions include "stable state" switching to detect splashing, one-second output debounce and error indication from infrared flooding.

Applications

• Water Tanks
• Coolant Reservoirs
• Hydraulic Fluid Reservoirs
• Warewash Equipment
• Irrigation Systems
• High & Low Level Detection
• Leak & Overflow Detection
• Flow Detection in Pipes
• Automatic Fill/Drain Level Control