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101 - 125 of 148
HM Digital Waterproof EC / TDS / Temp Combo Meter

HM Digital Waterproof EC / TDS / Temp Combo Meter

COM-100: Waterproof EC / TDS / Temp Combo Meter Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools &a...

$59.99
American Marine Pinpoint Conductivity Fluid 60ml

American Marine Pinpoint Conductivity Fluid 60ml

American Marine Pinpoint Conductivity Fluid 60ml PINPOINT® Conductivity Calibration Fluid 60ml 45.0 µS standardized fluid for calibrating the PINPOINT® Conductivity Monitor

$7.99
HM Digital pH Buffer Solution

HM Digital pH Buffer Solution

pH Buffer Solution Variety Pack HM Digital's pH buffer solution comes in powder form, so it's lightweight, takes up very little space, is inexpensive and has an indefinite shelf life. FEATURES Variety pack of pH buffer s...

$9.99
Digital Aquatics PC1 Power Controller Module

Digital Aquatics PC1 Power Controller Module

Increased Power Handling The PC1 is useful for controlling those high current devices like chillers and large lighting fixtures. The PC1 can supply up to 15A (10A inductive) to one or more devices. Both outlets controlled as on...

$69.99
American Marine Pinpoint Calcium Monitor Fluid Kit

American Marine Pinpoint Calcium Monitor Fluid Kit

1 bottle each of 100 ppm and 1,000 ppm calcium calibration fluids. The calcium monitor fluid kit is used to re-calibrate your PinPoint Calcium Monitor. It can also be used to validate the readings from your calcium test kits...

$15.99
American Marine Pinpoint II Calcium Monitor

American Marine Pinpoint II Calcium Monitor

The PINPOINT II Calcium Monitorâ„¢ is the only truly affordable and accurate digital Calcium measurement instrument. Powered by a 9-volt battery (not included) or the Pinpoint AC Adapter Kit (not included). The PINPOINT II Calcium M...

$269.96
Hanna Instruments Replacement Electrode for HI98121, HI 98127, HI 98128, HI98129, HI98130

Hanna Instruments Replacement Electrode for HI98121, HI 98127, HI 98128, HI98129, HI98130

Spare electrode for HI 98121, HI 98127, HI 98128, HI 98129 and HI 98130

$52.99
American Marine Pinpoint Nitrate Calibration Fluid Set

American Marine Pinpoint Nitrate Calibration Fluid Set

1 bottle each of 1 ppm, 10 ppm and 100 ppm nitrate calibration fluids.

$15.99
Digital Aquatics RKM-SW5 Switch 5

Digital Aquatics RKM-SW5 Switch 5

4 X Switch Ports With four switch input ports you can add another level of automation to your tank/system. Add float switches, leak detectors, ATO systems, and much more! IMPORTANT: Never apply power to the switch inputs. They ...

$69.99
American Marine Pinpoint ORP Controller

American Marine Pinpoint ORP Controller

American Marine PINPOINT ORP Controller PINPOINT ORP (REDOX) Controllerâ„¢ is an inexpensive rugged controller complete with a platinum ORP probe. This device will automate another electrical device like an ozonizer or ozone g...

$236.99
Digital Aquatics Salinity Probe Calibration Solution

Digital Aquatics Salinity Probe Calibration Solution

Digital Aquatics Conductivity Probe Calibration Solution (53 mS)

$7.99
American Marine Pinpoint Nitrate Monitor

American Marine Pinpoint Nitrate Monitor

American Marine is proud to introduce the PINPOINTâ„¢ Nitrate Monitor. The only truly affordable and accurate digital Nitrate measurement instrument engineered for marine saltwater. The PINPOINTâ„¢ Nitrate Monitor has been designed as...

$269.96
American Marine Pinpoint Conductivity Monitor

American Marine Pinpoint Conductivity Monitor

American Marine PINPOINT Conductivity Monitor PINPOINT Conductivity Monitorâ„¢ is an instrument for the measurement of hardness in freshwater. The conversions are 33 µS=17.9 ppm=1dH. Good quality reverse osmosis water measures...

$124.49
Hanna Instruments Low Range Phosphate Meter

Hanna Instruments Low Range Phosphate Meter

Phosphates are particularly important for the growth and development of plant roots, and hence are one of the most common fertilizers used in agriculture. In addition, phosphates are usually utilized in detergents and are needed, ...

$212.99
Hanna Instruments Combo pH/EC/TDS/Temperature Tester with Low Range EC

Hanna Instruments Combo pH/EC/TDS/Temperature Tester with Low Range EC

The HI 98129 Combo waterproof tester offer high accuracy pH, EC/TDS and temperature measurements in a single tester! No more switching between meters for your routine measurements. The waterproof Combo (it even floats) has a large...

$152.99
American Marine Pinpoint Oxygen Monitor

American Marine Pinpoint Oxygen Monitor

American Marine PINPOINT II Oxygen Monitor PINPOINT II Oxygen Monitorâ„¢ will quickly and accurately display a digital readout for dissolved oxygen in either % oxygen or ppm saturation.  The measurement range is 00.0-20.0...

$273.49
Tunze Cleansing Liquid 7040.20

Tunze Cleansing Liquid 7040.20

Tunze Cleaning Solution for pH, mV (ORP), and conductivity probes.

$7.77
Captive Purity Portable pH Pen/Meter

Captive Purity Portable pH Pen/Meter

This handy pH pen/meter is a great tool for any aquarist. It is extremely easy to use and is waterproof. Simply dip the meter in the solution to get the pH reading. Its high accuracy and resolution also make it suitable even for t...

$64.99
Hanna Instruments DiST 5 Waterproof Low Range EC/TDS/Temperature Tester

Hanna Instruments DiST 5 Waterproof Low Range EC/TDS/Temperature Tester

The original DiST (Dissolved Solids Tester) was first introduced in 1986 by HANNA instruments. Since then, Conductivity and Total Dissolved Solids measurements have never been easier. DiST`s ease-of-use, in combination with its af...

$98.99
HM Digital Waterproof ORP Meter

HM Digital Waterproof ORP Meter

ORP-200: Waterproof ORP Meter Ideal for all ORP testing, including anti-oxidant measurement, water purification applications, ionizers, agriculture, aquariums & aquaculture, chlorine monitoring, cooling tower disinfection, e...

$87.99
HM Digital COM-80 HydroTester EC/TDS Meter

HM Digital COM-80 HydroTester EC/TDS Meter

EC/TDS/Temp Water Resistant Hydrotester The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, d...

$45.50
Neptune Systems Apex Probe Module 3 (Dissolved Oxygen, Temp) Expansion Box

Neptune Systems Apex Probe Module 3 (Dissolved Oxygen, Temp) Expansion Box

The PM3 probe module, includes support for dissolved oxygen, temperature, and 6 digital inputs. The PM3 features are: Monitor/Control Dissolved and temperature. 6 digital inputs for float switches, water on floor sensors,...

$94.99
Duo-ORpH Controller (Probe not Included)

Duo-ORpH Controller (Probe not Included)

Dual monitoring of pH and ORP with a large LED display and control of either pH or ORP. Highly accurate. Digital pH-ORP controller with large size LED display for easy reading. High input impedance avoid measuri...

$149.99
Milwaukee Instruments Protective Hardshell Case for Refractometers & Photometers

Milwaukee Instruments Protective Hardshell Case for Refractometers & Photometers

Milwaukee Protective Hardshell Case for Milwaukee Refractometers and Photometers

$32.99
Tunze CO2 Controller 7074

Tunze CO2 Controller 7074

The Tunze CO2 Controller Set (7074/2) consists of pH Controller 7070/2, CO2 valve kit 7074.11 (including power supply unit 5012.01). The pH controller precisely monitors the pH of the aquarium and opens or closes t...

$481.99
101 - 125 of 148
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