$200 - $300

S272CD pH Sensor, Flat, 3/4" NPT, PPS by Sensorex

This series of electrodes is designed to provide an economical multi-purpose solution for in-line or submersion pH measurements. Based on our proven S200C bulb and S350CD flat surface pH glass technology, these rugged and durable electrodes are available in Ryton nipples with 1/2" or 3/4" NPT threads; or in our durable epoxy body with or without quick disconnect top caps. Choose from single or double junction designs, flat or recessed measuring surface configurations and cable lengths and connectors as required.

• Economical design for in-line or submersion use
• Choose from single or double junction models
• Threaded 1/2" or 3/4" NPT connections
• Choose from spherical or flat pH measuring surfaces
• Special models for low ionic and other specialty applications available

93453 Ultima Edge - 24mm Flat Field Eyepiece - 1.25" by Celestron

See the whole picture with Ultima Edge. These flat-field eyepieces were designed to provide an ultra-sharp, ultra-clear, crisp image from the center all the way to the edge of the field of view. The 24mm Ultima Edge eyepiece features fully multi-coated optics and an 8- element lens design, maximizing light transmission.

The Ultima Edge 24mm has a generous 65° field of view perfect for viewing planets, stars and the Moon's surface. This eyepiece provides good mid-power magnification, perfect for viewing the Moon's surface and most deep sky objects.

Body

The 24mm Ultima Edge eyepiece's main housing is machined from high grade aluminum with a black anodized outer surface.

Its 1.25" mounting barrel is internally threaded to accept standard 1.25" filters and adapters. It is compatible with 1.25" star diagonals and focusers. On the exterior of the eyepiece, you will find a uniquely designed, molded rubber grip ring for non-slip handling during observing sessions.

Viewing through the 24mm Ultima Edge eyepiece is comfortable for both eyeglass wearers and non-eyeglass wearers alike, thanks to the rubber eyecups and long eye relief of 29mm.

• 24mm Ultra Flat Field eyepiece designed for 1.25" focusers
• Incredibly crisp views from center to edge of field
• Fully multi-coated, 8-element lens design for excellent light transmission
• Wide 65° apparent field of view allows you to see more of the night sky
• Generous 29mm eye relief and fold-down rubber eyeguard for comfortable viewing with or without eyeglasses
• Molded rubber grip ring for non-slip handling

2434809 Bacteria Tests: BART Test Combination Package:Iron-Related Bacteria, Sulfate-Reducing Bacteria,Slime-Forming Bacteria (3 each) by AquaPhoenix

Combination pack: convenient multi-pack for detection (3 each of IRB/SRB/SLYM) of iron-related, sulfate-reducing, and slime-forming bacteria. BART biodetectors are excellent diagnostic tools to help identify the presence of process disruptors. Find out if you have bacteria creating slime layers and limiting disinfection, or discover if iron-reducing bacteria are eating your pipes.

Excellent diagnostic tool to help identify the presence of process disruptors

08009-23 ASTM Like Liquid-In-Glass Thermometer; 36C / Titer Test, 45mm Immersion, -2 to 68C, Organic Liquid Fill by Digi-Sense

These thermometers are precision manufactured to conform to ASTM E-1 specifications except for not being mercury filled. Designed for use in quality control laboratories or when mercury filled thermometers can not be used but where ASTM standards are still needed. ASTM established thermometer standards suited for special applications, and assigned an ASTM number according to each specification.

Thermometers feature permanently fused markings, blue spirit liquid, white background glass; are also individually serial numbered.

• Designed for specific ASTM (American Society for Testing and Materials) test methods
• Nonmercury blue spirit liquid

37950-03 Thermohygrometer with RS-232; 10 to 95% RH, 0 to 199F by Digi-Sense

Measure temperature and humidity with these thermohygrometers. Probe is replaceable if damaged.

These meters feature data hold, MIN/MAX, memory storage, selectable °F/°C, low-battery indicator, and auto-off after 20 minutes of nonuse.

• Download data to PC via RS-232

Includes

Hard case and one 9 V battery.

*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

90131-06 Solar-Powered Adjustable-Angle Celsius Thermometer; 6" L by Digi-Sense

View readings from almost any angle by simply adjusting the angle of the head. Three-inch diameter adjustable head has an easy-to-read LCD. Requiring no batteries these thermometers are ideal in pilot plant or research and development applications where exact readings are required. The safety circuit prevents false readings. Each thermometer is housed in a weather-resistant 304 stainless steel (SS) case. Stem is 304 SS. An acrylic lens protects the face. To further protect thermometer order a thermowell from page 1052. Simply match the stem length to the probe depth "A" for the thermowell.

*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

CRMBV-3/4 Motorized Ball Valves - Capacitor Return, 3/4", 125°F, 145 PSI Max by Quantrol

Capacitor return motorized ball valves are recommended for cooling tower bleed applications. These fully ported valves pass suspended solids more efficiently than solenoid valves, thus are less likely to stick open or closed. Maintenance requirements are reduced and reliability issignificantly increased. Chemical treatment programs are more effective because total dissolved solids (TDS) stay in the target control range.

• Compact Design
• Full Port 304 Stainless Steel Valve
• IP67 Water Resistant Actuator
• Optional UV Shield for Enhanced Protection
• Motor Power Open/Close
• Open/Close Visual Indicator
• 125° F Max Temp
• 145 PSI Max Pressure
• 5.5 FT, 3 Wire, 18 Gauge Power Cord with Grounding Plug
• 115 Volt, 50/60Hz

Ethernet Port by Agrowtek

An Ethernet port is optional providing the capability to connect the controller directly to an Ethernet network for access and control via remote internet connections. A serial port is included on all systems for direction connection to a PC.

52254 Ultima 80 Straight Spotting Scope by Celestron

The Ultima 80 mm offers a step up in aperture from the 65mm, offering 50% brighter images. The 80 mm refractor features excellent multi-coated optics packed into a portable and durable refractor design and it comes standard with a 20-60x zoom eyepiece.

This series was designed to perform well in a range of viewing situations, making it a great all-around optical instrument. You'll love it for observing nature and long distance spotting and since it is completely waterproof you can feel comfortable using it in extreme weather. The green rubber optical tube allows for subtle observation in any nature environment. Ultima spotters are a great companion for any nature or outdoor enthusiast. Soft carrying case included.

• 80 mm Refractor Spotting Scope
• Multi-Coated optics
• Straight through viewing angle
• 20-60x zoom eyepiece
• Sight tube for quick targeting
• Waterproof
• Soft carrying case
• Limited Lifetime Warranty

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

S353CD pH Sensor, Flat, Polymer, 12mm, S7 Cap by Sensorex

This series of electrodes is designed to provide an economical multi-purpose solution for in-line or submersion pH measurements. Based on our proven S200C bulb and S350CD flat surface pH glass technology, these rugged and durable electrodes are available in Ryton nipples with 1/2" or 3/4" NPT threads; or in our durable epoxy body with or without quick disconnect top caps. Choose from single or double junction designs, flat or recessed measuring surface configurations and cable lengths and connectors as required.

• Economical design for in-line or submersion use
• Choose from single or double junction models
• Threaded 1/2" or 3/4" NPT connections
• Choose from spherical or flat pH measuring surfaces
• Special models for low ionic and other specialty applications available