$50 - $75

Old Part Number: P19713
New Part Number: P197160LA

Old Part Number: P197175
New Part Number: P197175PA

WD-00653-38 Conductivity and TDS Standard, 111,900 μS; 5 x 60 mL Bottles/Pk by Oakton

• KCl, NaCl and 442 conversions printed on the bottle for ease of use (excluded on 60-mL bottle, but included in insert)
• Temperature corrections are printed on the bottle, with certified values listed in tables and referenced to 25°C (excluded on 60-mL bottle, but included in insert)
• Manufactured under ISO 9000 quality guidelines and traceable to NIST standards
• If unopened, shelf life is 1 year. If opened recommended shelf life is 4 months
• Conductivity options range from 1 μS/cm to 200,000 μS/cm

Convenient 60-mL bottles come in a pack of five - ideal for field use. Grab one when you're on the go!

• All Oakton Conductivity and TDS Standards are traceable to NIST standard reference materials
• Solutions help you calibrate conductivity instruments to ensure accuracy
• Standard values given at 25°C
• Use when readings are expected to be around 111.9 mS/cm ((111,900 μS/cm)

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

AH1000-Q Ammonium Hydroxide, ACS Grade, 1L by AquaPhoenix

• CAS No. 1336-21-6
• NH4OH FW=35.05
• Ammonia Solution/UN2672

Specifications

• Packaging Type: Glass
• Size: 1.00 L

93646 T-Adapter, (EdgeHD 925, 11 & 14) by Celestron

T-Adapter for 9.25, 11 & 14" EdgeHD optical tubes. It threads onto the rear cell.

This T-Adapter allows you to attach your 35mm DSLR camera to the prime focus of your EdgeHD telescope. This arrangement is used for terrestrial photography and short exposure lunar and planetary photography. It can also be used for long exposure deep-sky photography when using a separate guidescope.

Both a T-Adapter and T-Ring are required to mount a 35mm SLR camera to your instrument.

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

0554 3112 Charging valve/ core depressor by Testo

The high-quality shut-off valve ensures secure attachment of the charging hoses without any loss of refrigerant. Made of pressure-resistant brass, it offers durability and reliability in any application. Designed for ease of use, the valve makes handling quick and easy while protecting hands from refrigerant.

• Compatible with all common refrigerants
• Secure attachment of charging hoses with no loss of refrigerant
• Durable material made of pressure-resistant brass
• Quick and easy to use, user-friendly design, protects hands from refrigerant
• 2 pcs: 1x 1/4" SAE male thread to 5/16" SAE female thread; 1x 5/16" SAE male thread to 1/4" SAE female thread

Includes:

• 2x shut-off valves: 1x 1/4" SAE male thread to 5/16" SAE female thread; 1x 5/16" SAE male thread to 1/4" SAE female thread

09035-08 Irreversible 10 Point Vertical Temperature Label, 370-480°F/188-249°C; 10/Pk by Digi-Sense

Labels are made up of a series of temperature-sensitive elements sealed between heat-resistant substrates with transparent windows. Each element changes color distinctly as its rated temperature is met or exceeded. The changes to the label are irreversible, providing a temperature history of the surface being monitored. The labels will not delaminate when removed, allowing them to be attached to an inspection report to serve as a permanent record. Ideal for use in the food, automotive, molding and metal working industries. Accuracy is ±1°C from 29 to 99°C, ±1.5°C from 100 to 154°C, and ±1% + 1°C from 160 to 280°C. Shelf life: one year after date of purchase.

• Used as a quick inspection tool that the product is in usable condition during the shipping and receiving process
• Self-adhesive design

18524-34 Type T Thermocouple Quick Dis-connector, with Std-Connector, 18" L, .188 Dia. Grounded 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 measuring liquids, gases, or semi solids
• Designed with 316 Stanless Steel 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.

SI1801LHUS11 Tank Pump Low Head 17' discharge head (capacity 0.50 gal) 120V by Sauermann

The Si-1801 17' Low Head pump is capable of evacuating 132 gph, and is suitable for condensing boilers & furnaces, industrial refrigeration cases, and air conditioning units.

• Built to Resist: Can endure acidic condensate pH > 2.5
• Easily removable tank for simple maintenance
• Oil & acid resistant flow
• High performance: Discharges condensate up to 17'
• Low sound level: ≤ 45 dBA

Kit content

• One-piece centrifugal pump with 1/2 gal. tank
• Integrated barb end check valve 3/8" o.d. (10 mm)
• 6' power cord
• Safety switch wires (1' bare ends)
• Adaptor: 5/8" i.d., 3/4" i.d, 1" i.d., 1 1/4" i.d.

Old Part Number: P1072209
New Part Number: P107220.9VN

18523-17 Type J Thermocouple Quick Dis-connector, with Std-Connector, 6" L, .125 Dia. Exposed 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 measuring liquids, gases, or semi solids
• Designed with 316 Stanless Steel 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.

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

WD-35661-09 Conductivity and TDS Standards Pack, 84 µS, 1413 µS, 12.88 mS, and 111.8 mS; 60-mL of each 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