$200 - $300

WS-270 27" Aluminum Shutter by Schaefer

Schaefer aluminum shutters allow airflow in a single direction and are used as building air inlets to feed Schaefer exhaust fans, or on exhaust fans to prevent air entry when the fan is not operating.

Aluminum shutters are built tough for long life in the most demanding environments, all at an affordable price.

Features and Benefits:

• Constructed of heavy-duty brushed aluminum for corrosion resistance and greater durability
• Interlocking louvers for maximum weather protection and lightweight for high efficiency and easy installation
• Tie bar to eliminate shutter flapping
• Shutter motor kits available for automated opening/closing

SB-3775-D Bag, Whirl Pak Disposable 500/pk by AquaPhoenix

Disposable Whirl-Pak sample bags, 500/pack, Capacity is measured in fluid ounces when the bag is closed and tab is folded over three times. Volume and dimensions are approximate; bags should not be used at temperatures above 180° F (82° C). Bags can be frozen to any temperature, even liquid nitrogen - careful handling required after freezing. All bags are sterilized after manufacturing.

IB30 30" Economy Circulation Fan, White by Schaefer

Schaefer's made-in-America Import Beater™ circulation fans reduce heat stress and improve air quality at an "import beater" price. These wall and ceiling-mounted fans are designed to circulate large volumes of air in barns, greenhouses, factories and warehouses.

Features and Benefits

• Expanded guard spacing for maximum air movement and low noise
• Powder coated steel guards for corrosion resistance and durability
• Low noise levels and quiet operation
• Thermally protected TEAO motor with matching blade for high performance and long life
• UL and CSA certified motor for added safety
• Two year limited warranty
• Built in the USA

SB-1000 Saddle Bag by AquaPhoenix

Saddle Bag For Aluminum and Pelican Field Cases, This saddle bag fits comfortable over field test cases for added storage. Bag features large zippered pouches for storing reagents, equipment, paperwork or even a computer. Saddle bag features sturdy handle and adjustable; shoulder strap for use as a stand alone bag.

Part Number: G105310PN

MA887-BOX Digital Refractometer for Seawater Measurements by Milwaukee

The MA887 is an optical instrument that employs the measurement of the refractive index to determine the salinity of natural and artificial seawater, ocean water or brackish intermediates.

The digital refractometer eliminates the uncertainty associated with mechanical refractometers and is easily portable for ship, shore or home use.

The MA887 refractometer is an optical device that is simple and quick to use. Samples are measured after a simple user calibration with distilled or deionized water. Within seconds, the refractive index and temperature are measured and converted into one of three popular measurement units; Practical Salinity Units (PSU), Salinity in parts per thousand (ppt), or Specific Gravity (S.G. (20/20)).

All conversion algorithms are based upon respected scientific publications using the physical properties of seawater (not sodium chloride). The temperature (in °C or °F) is also displayed on the large dual level display along with helpful message codes.

Key features include:

• Dual-level LCD
• Automatic Temperature Compensation (ATC)
• Easy setup and storage
• Battery operation with Low Power indicator (BEPS)
• Automatically turns off after 3 minutes of non-use.

MC510 ORP Controller by Milwaukee

With Milwaukee's MC Controllers you can monitor and control pH and/or ORP levels.

The Milwaukee Instruments "MC" Controllers have a user selectable set point and a visual "Power Activated" LED notification light. Power to the controller box is turned on when the reading is Above or Below ( user selected ) the selected set point. These MC Controllers are ideal for CO2 or ozone dosing.

With each Milwaukee Smart controller, your aquarium will have the individual attention that it needs.

Each unit comes with 12 VDC adapter, mounting kit, probe, probe holder and starter calibration solution for pH. (factory calibrated for ORP)

• User selectable Hi/Low Set Point
• Visual LED alarm
• Supplied with 12 VDC adapter
• 1 power plug for O3 dosing
• Platinum ORP electrode (BNC connector)

*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

*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

EM802-EC-MB CS8000TC, Modbus 485 Blind Transmitter by Sensorex

The EM802-EC is our most cost-effective solution for connecting our S8000 series Contacting Conductivity sensors to a PLC or SCADA system. This small electronic module functions as a blind transmitter with a 4-20mA or MODBUS/RS485 output. No additional instrumentation is required to condition the sensor signal to be read by your PLC or SCADA. It can also be used to pair Sensorex sensors with any controller that has a 4-20mA or RS485 input card. Easily connects to our CS8300TC Modular Contacting Conductivity Sensor Package to form a complete monitoring solution.

• Blind 4-20mA or MODBUS/RS485 transmitter for connecting conductivity sensors to PLC or SCADA
• Small form factor saves valuable panel space
• Input Voltage Options: 12V DC MODBUS only; 24V DC 4-20mA & MODBUS
• Compatible with CS8300 conductivity sensor
• Compatible with PT1000 RTD temperature compensation

90452-05 Precision Industrial PRT, 0.187" x 9", -60~160C, Spade by Digi-Sense

AM1610 Series - Precision industrial PRT/RTD probes: Conform to the standard 385 curve, letting you use your DIN/IEC RTD meters fully. Manufactured using a special aged and tested 5mm long sensing element to achieve the best performance in stability and repeatability. All have an accuracy of 35 mK at 0°C and short-term stability of 10 mK at 0°C. The AM1610 has a temperature range of -60 to 160°C (-76 to 320°F)

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