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Dissolved Oxygen Meter, Professional Digital Pen Type Dissolved Oxygen Test, 0.0-40.0mg/L Dissolved Oxygen Detector for for Aquarium, Aquaculture

• 【Accurate And Stable】With automatic temperature compensation function, the temperature of the solution can be automatically compensated for 0-40℃, and the reading is accurate and stable.
• 【Pen Type Dissolved Oxygen Meter】Small pen-shaped design, light and easy to move, you can test water anywhere to get the purest water.

Fishawk Dissolved Oxygen Meter, Professional Digital Dissolved Oxygen Do Meter, Portable Water Quality Tester for Aquaculture Fish Pond, Handheld Smart Meter, 0-20mg/L, ±0.3 Mg/L

• Dissolved oxygen detector, adopts a plastic shell, which is durable and corrosion‑resistant.
• Equipped with dots type backlit LCD display, easy to measure and use.

Dissolved Oxygen Meter, 0.0‑40.0mg/L Resolution Portable Professional Digital Manual Water Quality Tester Economy Pocket DO Temperature Tester Pen with Backlight Screen for Labs, Marine Aquaculture

DO9100 Portable Dissolved Oxygen Meter, 0.0-40.0mg/L, Support Single Point or 2 Point Automatic Calibration, Digital Display DO Meter Water Quality Monitor with Temperature Detector(Standard)

• [ACCURACY INSTRUMENT] DO9100 is an accuracy instrument for measuring dissolved oxygen and temperature. With built in microcomputer processor to calculate and compensate all measurement data related to dissolved oxygen and temperature.
• [PROBE] A membrane with a polarographic sensor and a thermistor for temperature measurement and temperature compensation. The permeable membrane separates the measured solution from the sensing electrode and allows oxygen to pass through the membrane to react.

Dissolved Oxygen Meter, Oxygen Analyzer, Water Quality Monitor, Freshwater Aquarium Test Kit, Digital Dissolved Meter, DO Range: 0.0‑40.0mg/L Oxygen Concentration

• AUTOMATIC TEMPERATURE COMPENSATION-----This dissolved oxygen meter with automatic temperature compensation, our product ensures precise and consistent readings regardless of the solution temperature (0-40 ℃).
• HIGH ACCURACY AND FAST RESPONSE----Experience fast and accurate testing results. This dissolved oxygen test kit can test liquids ranging from 0.0-40.0mg/L, providing you with reliable data in no time.

Fyearfly Digital Pen Type Dissolved Oxygen Analyzer, Dissolved Oxygen Meter Digital Dissolved Oxygen Analyzer 0.0-40.0mg/L Concentration Tester for Swimming Pools, Dolc Water Aquaculture

• 【Automatic Temperature Compensation】With automatic temperature compensation function, the temperature of the solution can be automatically compensated for 0-40℃, and the reading is accurate and stable.
• 【Lightweight Pen Type Meter】Small pen-shaped design, light and easy to move, you can test water anywhere to get the purest water.

Dissolved Oxygen and Temperature Meter, Portable Digital Dissolved Oxygen Meter, 0.0-40.0mg/L, 0.1 mg/L Resolution, Dissolved Oxygen DO Meter for Aquarium Lab Swimming Pool(Back Light)

• [Accuracy Instrument] DO9100 is an accuracy instrument for measuring dissolved oxygen and temperature. With built in microcomputer processor to calculate and compensate all measurement data related to dissolved oxygen and temperature.
• [Probe] A membrane with a polarographic sensor and a thermistor for temperature measurement and temperature compensation. The permeable membrane separates the measured solution from the sensing electrode and allows oxygen to pass through the membrane to react.

SRFDD Pinless Wood Moisture Meter，Digital Moisture Meter with 10 File Wood Density Selection for Wood Building Material Firewood Walls Paper Floor

• Using high frequency electromagnetic wave induction measurement.
• Digital large screen LCD monitor.

SANON Water Quality Tester, ORP-969 Redox Meter ORP Tester Portable Digital Water Quality Tester Pen for Drinking Water, Aquarium, etc

Dissolved Oxygen Accessory,DO9100 Dissolved Oxygen Meter with Temperature Detector, Portable Digital Smart Meter for Aquarium Swimming Pool(Standard (Without Backlight))

• [Accuracy Instrument] Dissolved oxygen meter is a instrument for measuring dissolved oxygen and temperature. The dissolved oxygen probe is a thin film with a polarographic sensor and a thermistor for temperature measurement and temperature compensation. The permeable membrane separates the measured solution from the sensing electrode but allows oxygen to pass through the membrane to , and the concentration can be measured.
• [Probe] Dissolved oxygen refers to the concentration of molecular oxygen dissolved in water, generally expressed in mg/L (ppm) and saturation percentage (%), which is the percentage of dissolved oxygen in 1L of water. The oxygen concentration of our dissolved oxygen meter is 0.0-40.0mg/L, most of the range of dissolved oxygen meters on the market is 0.0-20mg/L. When measuring and calibrating, needn't open the protective cover of the electrode, just put the electrode in the solution for

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sourcingmap 5 Pieces AC 220V-240V DPDT Red LED Electromagnetic Relay w Socket Base

• Product Name : Power Relay;Model : HH52P;Socket Model : 2-M4X10
• Coil Voltage : AC 220-240V;Light Color : Red;Type : DPDT;Contact voltage and current: AC 250V/5A DC 28V/5A

Lancoon Water Heater Switch Wireless APP Voice Sensitive Touch Screen Control Fire Prevention & Glass Panel Damp Proof Material Suitable for Home Hotel(20A 4000W White)

• Voice Control: By connecting Amazon Alexa and Google Home Assistant, easily control your home water heater switch.There is no need to get up and turn on the water heater.
• Remote Control: It also support be controlled anytime anywhere.such as you can control the water heater from the app at work (APP: Smart life).

Anloximt Waterproof Wall Switch,Momentary Contact Switch | Outdoor Single Switch for Kitchen, Bathroom, and Swimming Pool

• ◎IP65 Waterproof Level: Wall light Switch is waterproof, dustproof, and electric shock-proof. It has a rubber-sealed inner to ensure a remarkable waterproof effect.
• ◎Impact-Resistant: Due to the use of high-quality pure PC material, our Single Light Switch has the features -resistant, impact-resistant, heat-resistant, and not easy to turn yellow.

ZB2-BE102 Key Lock Switch, 2-Position Key Lock Switch Suitable for Replacing Damaged Locks

• Good Electrical Conductivity: We have high-thickness silver contacts in this key lock switch, which has a long service life, good electrical conductivity, and is safe and efficient
• Stable Performance: This switch lock is a modular structure, easy to disassemble and assemble, the contacts can be replaced at any time, and the mechanical stability is good

Stronrive Waterproof Light Switch, Single and Double Circuit Waterproof Switch, Multi-Functional Outdoor Light Switch for Kitchen, Bathroom, and Swimming Pool

• ◤IP65 Waterproof Level: Wall light Switch is waterproof, dustproof, and electric shock-proof. It has a rubber-sealed inner to ensure a remarkable waterproof effect.
• ◤Impact-Resistant: Due to the use of high-quality pure PC material, our Single Light Switch has the features -resistant, impact-resistant, heat-resistant, and not easy to turn yellow.

Eayoly Waterproof Light Switch - Windproof Rocker Switch Adapter - Outdoor Single Switch for Kitchen, Bathroom, and Swimming Pool

• ♒Remarkable Waterproof Effect: Because our Wall light Switch is designed with a rubber-sealed inner , it has a remarkable waterproof effect. It is very practical.
• ♒Impact-Resistant: Due to the use of high-quality pure PC material, our Single Light Switch has the features -resistant, impact-resistant, heat-resistant, and not easy to turn yellow.

Electrovision 13 A Fused Spur. Bulk White

Youyijia Weatherproof Switch 20A Control Switch IP66 2 Way Double Light Switch Outdoor Garden Rainproof Double Switch

• [Security] The hue switch has a tamper-proof front plate, which has a four-point security connection. Double light switch Independent mechanical and electrical connections improve safety.
• [Durable Material] The dual-light switch is made of high-quality material, light switch which is durable, light switch cover practical and easy to install.

BSEED Smart 2.4G WiFi Touch Sensor Switch (Neutral Wire NOT Needed) Smart Life/Tuya/Google Alexa Compatible Glass Panel Wall Light Switches 2 Gang 1 Way Gold

• 【SINGLE FIRE WIRE SYSTEM】：This switch can be used whether there's a neutral wire or not in the circuit. MUST READ! IF YOU CONNECT WITHOUT NEUTRAL WIRE, YOU NEED INTALL A LED ADAPTER TO "L1" LAMP(JUST NEED INSTALL ONE), but if you connect a neutral wire, it don't need adapter.
• 【INSTALLATION TIP】: Always switch off the main electric supply power during installation till finished installing the panel, BUT, if you test the switch by touching the insert directly (without panel), take power off for 3mins, and then put on the panel before power on, it would be fine.

Mr Gadget Solutions® 1, 2, 3, Gang 2 Way Light Switches, Spur Switch with Back Box

• White triple wall switch. 3 Gang 2 Way.
• Fitting screws included. Comes with fitting instructions.

sourcingmap 5 Pieces AC 220V-240V DPDT Red LED Electromagnetic Relay w Socket Base

• Product Name : Power Relay;Model : HH52P;Socket Model : 2-M4X10
• Coil Voltage : AC 220-240V;Light Color : Red;Type : DPDT;Contact voltage and current: AC 250V/5A DC 28V/5A

Lancoon Water Heater Switch Wireless APP Voice Sensitive Touch Screen Control Fire Prevention & Glass Panel Damp Proof Material Suitable for Home Hotel(20A 4000W White)

• Voice Control: By connecting Amazon Alexa and Google Home Assistant, easily control your home water heater switch.There is no need to get up and turn on the water heater.
• Remote Control: It also support be controlled anytime anywhere.such as you can control the water heater from the app at work (APP: Smart life).

Anloximt Waterproof Wall Switch,Momentary Contact Switch | Outdoor Single Switch for Kitchen, Bathroom, and Swimming Pool

• ◎IP65 Waterproof Level: Wall light Switch is waterproof, dustproof, and electric shock-proof. It has a rubber-sealed inner to ensure a remarkable waterproof effect.
• ◎Impact-Resistant: Due to the use of high-quality pure PC material, our Single Light Switch has the features -resistant, impact-resistant, heat-resistant, and not easy to turn yellow.

ZB2-BE102 Key Lock Switch, 2-Position Key Lock Switch Suitable for Replacing Damaged Locks

• Good Electrical Conductivity: We have high-thickness silver contacts in this key lock switch, which has a long service life, good electrical conductivity, and is safe and efficient
• Stable Performance: This switch lock is a modular structure, easy to disassemble and assemble, the contacts can be replaced at any time, and the mechanical stability is good

Stronrive Waterproof Light Switch, Single and Double Circuit Waterproof Switch, Multi-Functional Outdoor Light Switch for Kitchen, Bathroom, and Swimming Pool

• ◤IP65 Waterproof Level: Wall light Switch is waterproof, dustproof, and electric shock-proof. It has a rubber-sealed inner to ensure a remarkable waterproof effect.
• ◤Impact-Resistant: Due to the use of high-quality pure PC material, our Single Light Switch has the features -resistant, impact-resistant, heat-resistant, and not easy to turn yellow.

Eayoly Waterproof Light Switch - Windproof Rocker Switch Adapter - Outdoor Single Switch for Kitchen, Bathroom, and Swimming Pool

• ♒Remarkable Waterproof Effect: Because our Wall light Switch is designed with a rubber-sealed inner , it has a remarkable waterproof effect. It is very practical.
• ♒Impact-Resistant: Due to the use of high-quality pure PC material, our Single Light Switch has the features -resistant, impact-resistant, heat-resistant, and not easy to turn yellow.

Electrovision 13 A Fused Spur. Bulk White

Youyijia Weatherproof Switch 20A Control Switch IP66 2 Way Double Light Switch Outdoor Garden Rainproof Double Switch

• [Security] The hue switch has a tamper-proof front plate, which has a four-point security connection. Double light switch Independent mechanical and electrical connections improve safety.
• [Durable Material] The dual-light switch is made of high-quality material, light switch which is durable, light switch cover practical and easy to install.

BSEED Smart 2.4G WiFi Touch Sensor Switch (Neutral Wire NOT Needed) Smart Life/Tuya/Google Alexa Compatible Glass Panel Wall Light Switches 2 Gang 1 Way Gold

• 【SINGLE FIRE WIRE SYSTEM】：This switch can be used whether there's a neutral wire or not in the circuit. MUST READ! IF YOU CONNECT WITHOUT NEUTRAL WIRE, YOU NEED INTALL A LED ADAPTER TO "L1" LAMP(JUST NEED INSTALL ONE), but if you connect a neutral wire, it don't need adapter.
• 【INSTALLATION TIP】: Always switch off the main electric supply power during installation till finished installing the panel, BUT, if you test the switch by touching the insert directly (without panel), take power off for 3mins, and then put on the panel before power on, it would be fine.

Mr Gadget Solutions® 1, 2, 3, Gang 2 Way Light Switches, Spur Switch with Back Box

• White triple wall switch. 3 Gang 2 Way.
• Fitting screws included. Comes with fitting instructions.