$200 - $300

HI-1000P Hallway Air Intake for Interior Walls, Poly by Schaefer

• Designed to control airflow between two interior spaces
• Mounts flush to an interior wall up to 6" thick
• Durable polyethylene housing with insulated damper door and air deflectors adjust airflow volume and direction with the seasons

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

Part Number: 66L-174-10

LabSen 223 Glass Combination pH/Temp. Electrode for Viscous and Low Ion Concentration Samples by Apera

Backed by proprietary Swiss sensor technology and materials, LabSen® 223 Glass Combination pH/Temp. Electrode is designed for viscous and low ion concentration samples' pH testing and ideal for titration. The electrode is compatible with TRIS buffer solutions.

The electrode is backed up with a 6-month warranty by Apera Instruments.

• Moveable Sleeve Junction - easy to clean, especially suitable for low ion concentration solution and non-aqueous solution. The infiltration rate of the electrolyte is determined by the tightness of the sleeve during installation.
• Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.
• Special Glass Membrane - The Cylindrical glass membrane is highly resistant to general impact (the traditional glass bulb membrane is a lot more fragile), and can be tested in high-temperature samples (up to 176°F).
• Built-in temperature sensor for Automatic Temperature Compensation

MW803 pH/Conductivity/TDS/Temperature Tester with Replaceable Electrode by Milwaukee

The MW803 and MW804 are pocket testers with dual-level LCD that measure pH/ Conductivity/TDS/Temperature in one single tester!

The large display shows readings in an extended range from 0.00 to 14.00 pH and 0 to 3999 μS/cm, 0 to 2000 ppm (MW803), 0 to 20.00 mS/cm, 0 to 10.00 ppt (MW804) and simultaneously shows temperature from 0.0 to 50.0°C or 32.0 to 122.0°F. They have a stability indicator and hold function that freezes the display for easy and accurate recording. The large display also has graphic symbols to guide you through all operations. The EC/TDS conversion factor is user selectable as well as the temperature compensation coefficient (β).

Ideal for quick and accurate measurements in swimming pools, aquariums and horticultural applications they can also be used in Industrial and Laboratory applications such as cooling towers, food processing, plating, drinking and waste water etc.

44316 Microdirect 1080P HDMI Handheld Digital Microscope by Celestron

A New View

The MicroDirect 1080p HDMI Handheld Digital Microscope streams in amazingly clear 1080p HD video via HDMI cable-directly through a TV monitor or projector-- No computer needed. This microscope can connect to any compatible monitor or projector via HDMI cable for real 1080p HD video streaming at up to 220x magnification. That means high quality viewing of 3D specimens, samples, and even some slides!

REAL HD Video and Imaging

Great for the classroom, lab or home, the 3.5MP high speed sensor allows for high definition streaming and still image and video recording. Still images can be saved directly to the onboard Micro SD slot (card not included) while viewing on monitor. The included PC software and USB cable make recording HD videos simple. Use the included fully adjustable stand to steady the microscope to get the perfect image or video.

• 1080p video streaming of microscopic worlds via included HDMI cable directly to your monitor or projector. NO COMPUTER NEEDED!
• 3.5MP high speed sensor has larger pixel sizes that allow more details and a higher refresh rate
• 10x to 220x power magnification
• Records high definition still images. Images are saved directly to a Micro SD card (not included)
• Capture 720p High Definition video at 30fps when connected to a PC via USB
• We're taking our handheld digital microscope line to the next level with the MicroDirect 1080p HDMI Handheld Digital Microscope. Perfect for teachers, students, entomologists, forensic scientists, microscopic explorers, and more. This microscope not only offers true 1080p, high definition viewing, but also still image and video recording.

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

MA883BOX Digital Refractometer For Wine & Grape Juice / Must Measurments by Milwaukee

Thousands of food and beverage professionals and hobbyists, from chefs and food quality professionals to brewers and wine makers, have moved to digital Baume measurement from less accurate and less precise optical refractometers.

WHAT PEOPLE ARE SAYING

"Anyone who produces wine, grape juice, maple syrup or craft beer should find this product one of the best investments they make on any piece of equipment."

"I am in love with this instrument. No more large samples. No more phony readings from badly made refractometers."

"Dramatically improved my commercial brewing consistency & efficiency. Now I can quickly stop my sparge when I get to to my OG."

"I used this for finishing Maple Syrup. I had been trying to determine sugar content using temperature and a hydrometer. I found both very difficult to use. The refractometer was much easier."

"Very easy to measure the sugar in our must"

SUMMARY

The Milwaukee digital °Baumé refractometer is temperature compensated with a 0 to 28 Baume range and +/- 0.1 Baume accuracy. It is easy to use with simple two button operation and fast with a response time under 2 seconds. Maintenance is a breeze also with an easy-to-clean sealed flint glass prism and stainless steel well. The MA883 eliminates the uncertainty of optical refractometers by providing and accurate digital readout.

DESIGN FEATURES

• Fast, accurate results with digital dual level LCD readout.
• Easy measurement with just 2-3 drops of sample needed and results less than 2 seconds.
• Simple one-point calibration using distilled or deionized water.
• Easy to clean, stainless steel sample well with unit rated to IP65 as "dust tight" and protected against water jets.
• Battery percent level indicator with automatic shut-off (batteries included).
• Ideal for winemakers, brewers, syrup producers, food producers and many other applications.
• MA883 converts the Brix readings to Baume based on the table found in the Official Methods of Analysis of AOAC International, 18Th Edition.
• 1 Baume is approximately equal to 1.8% Brix, and 1 °Baumé is roughly equivalent to 1 % alcohol when the wine is fully fermented.

WD-27003-00 Self-cleaning pH Electrode, CPVC Housing, 10-ft Cable, BNC by Oakton

No more solid buildups

• Flat surface prevents buildups, while fluid flow cleans surface for longer life
• Use with most meters and controllers - BNC connector and ATC element work with a variety of units
• Double junction for difficult applications

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

S201CIT pH Sensor, 12mm, Refill, Calomel Free by Sensorex

Calomel Free pH electrodes!

The performance of a Calomel electrode is now available without the hazardous Mercury associated with the design. The "Calomel Free" design features an Ag/AgCl based double junction reference with a unique silver ion trap acting as a third junction to impede any silver ion contact with the sample. Reference output is adjusted to deliver the same output as a Calomel electrode using a silver chloride reference.

Glass or Plastic Body Electrodes!

Traditionally, pH electrodes have been made of all glass construction. However, today's thermoplastics are able to construct pH electrodes with durable and chemically resistant bodies to reduce any breakage. The protected design of the plastic body electrode extends over the measuring surface, making the pH glass bulb virtually unbreakable.

Sealed vs. Refillable Reference!

Both sealed and refillable styles are available. Sealed references are gel-filled and maintenance free while refillable designs extend electrode life by having a refillable reference electrolyte.

Features:

• Fast Response...No Silver Ion Contamination
• Use in Place of Calomel pH and Reference Electrodes
• Combination Triple Junction Design
• Uses No Hazardous Calomel Based Material (MERCURYFREE!)/RoHS compliant
• Sealed and Refillable Models
• Glass and Epoxy Body Models

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

Part Number: F105110PM2

610-0051-100 Single-Gas Calibration (Hydrogen Sulfide, 10 PPM, Balance N2), 34 Liters by RAE Systems

Green cylinder technology not only saves the environment, it also saves time and money.

• Gas cylinder size options 34, 58 and 116 liter
• Green Refillable cylinder
• "Strip and Ship" program for easy return of empty cylinders
• Small cylinder footprint
• Cylinder technology offers exceptional gas stability
• All gas cylinders use the same valve

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

S272CDTC/P1K/10/TL/TL pH Electrode, double-junction, P1K, TL/TL 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