$150 - $200

AAA064012 SGT-P Replaceable Single Gas Detector, H2S (0~100ppm) by Senko

SGT-P is a single replaceable gas detector designed to detect oxygen deficiency and the presence of toxic gas in the ambient environment. SGT-P is the replaceable type of gas sensor and battery. When activated, SGT-P continuously monitors ambient air for the presence of a specific gas and alerts the user to potentially unsafe exposure with LED, vibrating, and audible alarms in the event that gas concentration exceeds alarm set points.

KEY FEATURES

• Sensor and battery replacement available
• Power on / off functionality
• Configuration via exclusive IR Link

LabSen 246-5 Glass pH/Temp. Electrode for Small Samples (<0.2mL) by Apera

Crafted with proprietary sensor technologies and premium materials from Switzerland, LabSen 246-5 pH/temp. Electrode is designed for high-precision pH measurement of general water solution samples in small volume as low as 60μL.

• The Ø6mm sensor tip is designed for quick and precise pH measurement in small volume as low as 60 μL with the usage of the semi-micro container included in the kit
• The Long-Life Reference System simply maintains the reference potential stability in a longer term, significantly extending the electrode's service life
• Sturdy glass membrane, 10 times stronger than traditional glass membranes
• The built-in temperature sensor enables automatic temperature compensation

LabSen 805 Glass-body pH/Temp. Electrode for Purified Water& Low Ion-Concentration Solutions by Apera

Crafted with proprietary sensor technologies and premium materials from Switzerland, Apera LabSen 805 Glass pH/temp. Electrode is engineered for quick and high-precision pH measurement of pure water such as distilled water, drinking water, RO water, surface water, well water, boiler water, storm water, deionized water, etc.

• The L-type olive-shape membrane simply provides fast response in low ionic strength solutions and low temperature liquid thanks to its ultra-low resistance formula (<50MΩ) and large hydrogen ion sensing area, helping you obtain a stabilized reading in a much easier manner.
• The Long-Life Reference System simply maintains the reference potential stability in a longer term, significantly extending the electrode's service life.
• Triple ceremic junctions ensure quick electrolyte discharge for fast response in pure water pH measurement
• The built-in temperature sensor enables automatic temperature compensation.

LabSen 835 Glass-body pH/Temp. Electrode for Strong Acid Samples and HF (Hydrofluoric) Acid by Apera

Crafted with proprietary sensor technologies and premium materials from Switzerland, LabSen 835 pH/temp. Electrode is designed for high-precision pH measurement of liquids containing strong acids or hydrofluoric acids.

• LabSen HF-type membrane is resistant to hydrofluoric corrosion and minimizes acidic error
• HF Measurement — LabSen 835 pH electrode is capable of measuring solution containing HF acid for up to 1000 times. (measurement time<1 min, and HF concentration should be less than 0.1mol/L or 2000 ppm)
• Open junction and polymer electrolyte for full contact with samples while eliminating junction clogs
• Silver Ion Trap reference system outperforms ordinary Ag/AgCl systems by maintaining reference potential stability over time with Ag+ free environment, which significantly extends the electrode's service life.
• Sturdy glass membrane, 10 times stronger than traditional glass membranes
• The built-in temperature sensor enables automatic temperature compensation.

LabSen 845 Glass-body pH/Temp. Electrode for Strong Alkali and High Salinity Solutions by Apera

Crafted with proprietary sensor technologies and premium materials from Switzerland, LabSen 845 pH/temp. Electrode is designed for high-precision pH measurement of strong alkaline solutions (10-14 pH) and/or high salinity solutions (< 5000 ppm). It also works well for general water solutions.

• LabSen HA-type glass membrane designed for strong alkalis (pH 10-14), minimizing alkaline errors
• Open junction and polymer electrolyte for full contact with samples while eliminating junction clogs
• Silver Ion Trap reference system outperforms ordinary Ag/AgCl systems by maintaining reference potential stability over time with Ag+ free environment, which significantly extends the electrode's service life.
• Sturdy glass membrane, 10 times stronger than traditional glass membranes
• The built-in temperature sensor enables automatic temperature compensation.

LabSen 865 Glass-body pH Electrode for High-temp. and Caustic Solutions by Apera

Backed by proprietary sensor technology and premium materials from Switzerland, Apera LabSen 865 Glass pH/temp. Electrode is designed for high-precision pH measurement of high-temperature water solutions and/or caustic solutions such as electroplating solutions.

• Engineered to withstand high temperature and caustic liquids with the specialized PHY membrane and PTFE anti-clogging junction, ensuring consistent and precise results.
• Silver Ion Trap reference system for stable reference potential and long service life
• Sturdy glass membrane, 10 times stronger than traditional glass membranes
• The built-in temperature sensor enables automatic temperature compensation.

PH60-WW pH Tester Kit for Wastewater, Suspensions, Emulsions, and Other Dirty Liquids with LabSen 335 ATC pH Electrode by Apera

Discover the next level of precision, reliability, and portability with our top-rated professional PH60 tester, now paired with the Swiss LabSen 335 pH/temp. electrode. This powerful combination revolutionizes pH measurement, especially in challenging environments like wastewater, suspensions, emulsions, and other dirty liquids. The electrode also works well in general water solutions. Elevate your pH measurement experience with our comprehensive test kit that leaves no detail unaddressed. This all-inclusive kit not only includes ready-to-use calibration buffer solutions (4.00/7.00/10.01) and soaking solution but also features the Apera CalPod Solution Organizer for optimizing your calibration process. All components are conveniently housed in a rugged carrying case, ensuring that you can effortlessly perform reliable pH measurements and calibrations wherever you go.

• PORTABILITY + RELIABILITY — The top-rated pH tester is now paired with the Swiss LabSen 335 pH electrode, allowing you to effortlessly take lab-grade pH measurement in dirty and complex liquids such as wastewater, suspensions, and emulsions wherever you go.
• SWISS SENSOR TECH — Crafted with Swiss sensor technology and premium materials, LabSen 335's open junction and polymer electrolyte eliminate the common issue of junction clogging in dirty liquid testing, ensuring consistent and precise results.
• ROBUST REFERENCE SYSTEM — LabSen 335 employs a Long-Life Reference System, outperforming ordinary Ag/AgCl systems by maintaining reference potential stability over time, which significantly extends the electrode's service life.
• INTELLIGENT METER BODY — The water-resistant meter body is featured with intelligent functions such as Automatic Calibration, Auto. Temperature Compensation, Reading Alarm Settings, Automatic Reading Lock, and more to meet your precision needs.
• COMPLETE TEST KIT — not only includes ready-to-use calibration buffer and soaking solutions, but also features the Apera CalPod Solution Organizer for optimizing your calibration process.

PH60Z-WW Smart pH Tester Kit for Wastewater, Suspensions, Emulsions and Other Dirty Liquids with LabSen 335 ATC pH Electrode by Apera

Discover the next level of reliability, smart controlling, and data management with our top-rated Smart PH60Z tester, now paired with the Swiss LabSen 335 pH/temp. electrode. This powerful combination revolutionizes pH measurement, especially in challenging environments like wastewater, suspensions, emulsions, and other dirty liquids. The electrode also works well in general water solutions. Elevate your pH measurement experience with our comprehensive test kit that leaves no detail unaddressed. This all-inclusive kit not only includes ready-to-use calibration buffer solutions (4.00/7.00/10.01) and soaking solution but also features the Apera CalPod Solution Organizer for optimizing your calibration process. All components are conveniently housed in a rugged carrying case, ensuring that you can effortlessly perform reliable pH measurements and calibrations wherever you go.

• RELIABLE + SMART + PORTABLE — The top-rated smart pH tester is now paired with the Swiss LabSen 335 pH electrode, allowing you to effortlessly take lab-grade pH measurement in dirty and complex liquids such as wastewater, suspensions, and emulsions and manage data wherever you go.
• SWISS SENSOR TECH — Crafted with Swiss sensor technology and premium materials, LabSen 335's open junction and polymer electrolyte eliminate the common issue of junction clogging in dirty liquid testing, ensuring consistent and precise results.
• SMART DATA MANAGEMENT — Connect the meter to ZenTest Mobile App via Bluetooth to use the cloud-based data management functions; easily record, organize, and share all the measurement data with time stamps, geo-location, notes, and photos.
• USER-FRIENDLY WORKFLOW — The ZenTest Mobile App will automatically guide you through step by step to perform professional calibration, and allow you to fully customize all the parameter settings to meet your specific testing needs.
• COMPLETE TEST KIT — not only includes ready-to-use calibration buffer and soaking solutions, but also features the Apera CalPod Solution Organizer for optimizing your calibration process.

PROBINTEC Intelligent EC Probe with 5m Cable for IntelliDose by Bluelab

Measure the nutrient levels in your solution accurately and reliably

Features

• This probe is a direct replacement for the EC probe on the Bluelab IntelliDose Controller
• With an accurate EC sensor, you can measure electrical conductivity (EC) in your solution and ensure crops are getting the right amount of nutrients they need to thrive
• Wire configuration: Black, White, Red

18771 PowerTank Lithium by Celestron

The new PowerTank Lithium keeps the charge going for the astronomer on the go. The Lithium Phosphate (LiFePO4) battery chemistry has significant advantages over other battery chemistries.

• Portable power pack for your computerized Celestron telescope using Lithium Iron Phosphate (LiFePO4) chemistry
• Smaller, lighter, safer, and easier to maintain than lithium-ion and sealed lead acid designs
• Up to 2000 charge cycles four times more than lithium-ion & 7 times more than sealed lead-acid designs.
• Un-recharged shelf life of up to 10 years 3 times better than lithium-ion and 10 times better than sealed lead-acid designs
• Evironmentally friendly Does not use toxic heavy metals

• The LiFePO4 has an un-recharged shelf life of 10 years compared to 3 years for the Lithium Ion and 6-9 months for a Sealed Lead-Acid battery.
• The battery performance of the PowerTank Lithium degrades at a much slower pace than other chemistries.
• The LiFePO4 can be charged and discharged 2000 times compared to only 500 for a Lithium Ion battery and 300 for sealed lead-acid designs.
• The batteries will last as long as the telescope you use it with!
• The LiFePO4 uses phosphates instead of environmentally hazardous elements like cobalt or lead commonly found in other rechargeable batteries.
• Can withstand higher temperatures than lithium-ion designs and will not be a fire danger if accidentally punctured.

This combined with it's rugged design make it the perfect outdoor power supply.

Keep your telescopes, smartphones, tablets, GPS systems, cameras and other USB-powered devices as active as you are with PowerTank Lithium the ideal outdoor portable-charging solution for your electronic gear.

18777 PowerTank 17 by Celestron

Take your telescope anywhere with this portable, rechargeable power supply. Enjoy extended observing and imaging sessions worry-free with 17 amp-hours of power in one convenient package. Use the included removable red flashlight while your eyes are dark-adapted to find accessories and reference star charts. When your session is over, the powerful LED spotlight illuminates your observing area so you can pack up quickly and safely, without leaving anything behind.

The extra large PowerTank 17 is more than just a telescope accessory; it's also an essential assistant on your next outing. You can use PowerTank to charge drained electronic devices with a cigarette lighter adapter. PowerTank also comes with a built-in siren and AM/FM radio for emergencies.

Be prepared for stargazing and emergencies alike with PowerTank 17!

• 17 amp-hour power supply for your Celestron telescope
• 2 x 12V DC output car jack socket
• Built-in AM/FM Radio and Siren
• Built-in (2) USB ports for charing portable devices
• Removable red filtered flashlight with magnetic back
• Energy efficient LED spotlight
• Handy jump-start system
• Built-in circuit breaker for safety
• Cigarette lighter adapter included
• Switchable 110v-220v AC adapter

21037 PowerSeeker 70EQ Telescope by Celestron

• Quick and easy no-tool setup
• Slow motion controls for smooth tracking
• Erect image optics - Ideal for terrestrial and astronomical use
• Fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity
• 3x Barlow lens triples the magnifying power of each eyepiece
• Accessory tray for convenient storage of accessories
• BONUS Astronomy Software download with a 10,000 object database, printable sky maps and 75 enhanced images

21045 PowerSeeker 114EQ Telescope by Celestron

The Celestron PowerSeeker series of telescopes is designed to give the first-time buyer the perfect combination of quality, value, features and power. Offering exceptional value, these telescopes feature portable yet powerful designs with ample optical performance to excite any newcomer to the world of amateur astronomy.

• Quick and easy no-tool setup
• Slow motion controls for smooth tracking
• Erect image optics - Ideal for terrestrial and astronomical use
• Fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity
• 3x Barlow lens triples the magnifying power of each eyepiece
• Accessory tray for convenient storage of accessories

21048 PowerSeeker 80EQ Telescope by Celestron

The Celestron PowerSeeker series of telescopes is designed to give the first-time buyer the perfect combination of quality, value, features and power. Offering exceptional value, these telescopes feature portable yet powerful designs with ample optical performance to excite any newcomer to the world of amateur astronomy.

• Quick and easy no-tool setup
• Slow motion controls for smooth tracking
• Erect image optics - Ideal for terrestrial and astronomical use
• Fully coated glass optical components with high transmission coatings for enhanced image brightness and clarity
• 3x Barlow lens triples the magnifying power of each eyepiece
• Accessory tray for convenient storage of accessories
• BONUS Astronomy Software download with a 10,000 object database, printable sky maps and 75 enhanced images

21061 Astromaster 70AZ Telescope by Celestron

If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky.

The AstroMaster Series produce bright, clear images of the Moon and planets. It is easy to see the moons of Jupiter and the rings of Saturn with every one of these fine instruments. For views of the brighter deep space objects like galaxies and nebulae, we recommend the larger aperture and light gathering ability of the Newtonian reflectors.

• Quick and easy no-tool setup
• Permanently mounted StarPointer
• Erect image optics - Ideal for terrestrial and astronomical use
• Quick release dovetail attachment - no tool setup
• Pan handle Alt-Az control with clutch - for smooth and accurate pointing
• Rugged pre-assembled tripod with 1.25" steel tube legs - Provides a rigid and stable platform
• All coated glass optics for clear, crisp images
• Deluxe accessory tray for convenient storage of accessories
• BONUS Astronomy Software download with a 10,000 object database, printable sky maps and 75 enhanced images