Mini Liquid Level Sensor is designed to be inserted vertically into wet environments to detect liquid level from 0 to 1.88” (48mm) or as an alarm. The 28090 sensor has a single analog output which may be directly connected to the Propeller Activity Board 4-channel A/D converter or easily interfaced with the MCP3002 A/D with a FLiP Multicore Microcontroller. The 28090 mini liquid level sensor is ideal for water level alarms for moisture-sensitive environments, water level indicator for fluid reservoirs, and stream-level indicator when used in a controlled reservoir (stream well).

The sensor is used for determining the liquid’s level in the vessel. It is powered with the voltage from 2.0 V to 5.0 V. The output is an analogue voltage that increases its value along with the depth of immersion of the probe which makes it compatible with most of the development kits, for example, Arduino. The device works in the range of up to 48 mm.

Application:

1. Water level alarm for moisture-sensitive environments
2. Water level indicator for fluid reservoirs
3. Stream-level indicator when used in a controlled reservoir (stream well)

Features: 

1. Output voltage boosts along with the immersion depth of the module.
2. Supported by Blockly Prop and C library interfaces
3. 2V to 5V analog output is easy to read by many controllers or A/D converters
4. 9in (22cm) 3-pin female-female extension cable included
5. 2.0mm mounting holes allow for rigid installation
6. Detects tiny amounts of change in liquid levels in tight-space applications
7. Fast response time
8. Suitable for a variety of non-corrosive or non-toxic liquids (not meant for foods)

Package Includes:

1 x Waveshare Liquid Level Sensor

Grove – ORP Sensor Kit (HR-O) aims to measure the cleanliness of the water and its ability to break down contaminants. It works with a 5 meters IP68 ORP probe, offering a -2000mV to 2000mV sensing range, operating under 0-80℃ which is a member of the simple-to-use Grove ecosystem and supports Arduino programming. The sensor is environmentally friendly and RoHS certificated.

An ORP Sensor measures the activity of oxidizers and reducers in an aqueous solution, it measures the ability of a lake or river to cleanse itself or break down waste products. Different oxidation-reduction processes and conditions have different ORP values(mV), with aerobic conditions having higher ORP values and anaerobic conditions having lower ORP values. In common conditions like spas, it is widely acknowledged that the safe values are between 650 mV and 750 mV.

For more anaerobic and aerobic environments detection, you will find this sensor amazed that it offers an even wider range measurement and the value of which is from -2000 mV to +2000 mV. It also provides ±15mV sensing accuracy when it operates at 0-60°C.

With such performance, its assembly, operation, and value-read are pretty simple. Being a member of the Grove ecosystem and supported by Arduino, you can easily connect it to any Arduino-support board with a Grove cable and simply read the output ORP value.

Note

If you find white solid granular crystals around the probe shroud after receiving the product, this is normal and please do not worry. It is caused by temperature change, environmental change or redox during the process of delivery. However, it will not affect the nature of the internal potassium chloride solution and the normal operation of the sensor.

If you find it, please use a wet paper towel to gently wipe off the crystals on it, please do not let it near your children to avoid accidental ingestion.

Applications:

1. Monitor and control oxidation-reduction reactions
2. Disinfected water detection
3. Health-friendly water detection
4. Determine the types of microbial
5. Dectct anaerobic microbial activity
6. Wastewater treatment
7. Aquaculture
8. Industrial sewage discharge monitoring
9. Monitor and control oxidation-reduction reactions
10. Disinfected water detection
11. Health-friendly water detection
12. Determine the types of microbial
13. Dectct anaerobic microbial activity
14. Wastewater treatment
15. Aquaculture
16. Industrial sewage discharge monitoring

Features:

1. Grove ORP Sensor Upgrade: Assemble 5-meters IP68 ORP probe, offering -2000 mV to 2000 mV sensing range, operating under 0-80℃, member of simple-to-use Grove ecosystem
2. Enhanced Measurement Performance: Maintain ±15mV sensing accuracy at 0-60°C
3. Working Voltage: Support both 3.3V and 5V working conditions
4. Exchangeable Sensor Nodes: Support BNC-linker sensor probes
5. RoHS Certification: Environmentally friendly, assured detection

Specifications:

1. Range measurement: -2000mV to +2000mV
2. Resolution ratio: 1 mV
3. Accuracy: ±15mV
4. Aero potential point(pH): 7.00±0.30
5. Slope factor: >96%
6. Work voltage: 3.3V/5V
7. Work temperature: 0-80℃
8. Liquid junction boundary: Polyvinyl tetrachloride
9. Material of the housing: PPS
10. Membrane resistance: <500 MQ
11. Wire length: 5 meters
12. Method of installation: Drop
13. Level of protection: Ip68
14. Electrical connection: BNC

Packages Includes:

1 x Seeed Studio Grove ORP Sensor Kit Pro (HR-O) – IP68

This small 5V non-contact liquid level sensor with Gravity Interface is able to detect 0-100°C conductive liquid levels in non-metallic containers in sensing range of 3mm. Provided with digital quantity output(low), the sensor can be directly used on Arduino UNO for liquid level detection of the water tank, beverage machine, water pipe, scientific experiment test tube, etc.

With IP67 protection level, the module employs an integrated seamless shell and fully enclosed waterproof glue encapsulation process to block the intrusion of dust and protect internal electric components. Besides, the sensor cable, with great electrical conductivity, is flexible, durable, waterproof, and oil-proof.

Features:

Specifications:

DFRobot Gravity: analog electrical conductivity sensor/meter(K=10) is particularly used to measure the high electrical conductivity liquid, such as seawater, concentrated brine, etc. The measurement range is up to 100ms/cm. This product is suitable for the water quality application of mariculture, for example, marine fisheries, marine aquariums. you may also check liquid sensor selection guide to get better familiar with our liquid sensor 
It supports 3~5v wide voltage input and is compatible with 5V and 3.3V main control boards, such as arduino and raspberry pi. The excitation source adopts an AC signal, which effectively reduces the polarization effect, improves the precision, and prolongs the life of the probe; The software library uses a single-point calibration method, and can automatically identify a standard buffer solution, so simple and convenient.

Features:

1. 3.0~5.0V wide voltage input，0~3.2V output voltage, which is compatible with 5V and 3.3V mainboard
2. AC excitation source effectively reduces polarization
3. Gravity connector and BNC connector, plug and play, no welding
4. The software library supports single-point calibration and automatically identifies standard buffer solutions, integrates temperature compensation algorithm
5. Uniform size and connector, convenient for the design of mechanical structures

Package Includes:

1 x Electrical Conductivity Probe（K=10, Laboratory Grade）

1 x Signal Conversion Board

4 x Standard Buffer Solution 12.88ms/cm

1 x Gravity Analog Sensor Cable

2 x Waterproof Gasket

1 x Screw Cap for BNC Connector

4 x M3 x 10 nylon pillar

A cable Float Switch is a control device for automatic On/Off pumps, motors,s and magnetic valves. It is also an alarm device at certain pre-determined surface levels. It is suitable for use in non-flammable liquids at 250 volts. In potentially explosive atmospheres (e.g. oil tanks) the Switch can be used in conjunction with (Ex) I-isolator switch units. Due to its large float casing, the float Switch has a buoyancy that guarantees smooth, trouble-free operation under all conditions. The switch has a double chamber and a final remolding finish to make it absolutely hermetic.

Features: 

1. It can test the pressure of the liquid
2. The float switch is a switch that regulates fluid level in the tank or well etc
3. The float switch is resistant to water(sewage water) it is relatively capable of being used for oil, most acids and alkalis
4. The float switch is not explosion-proof

Package Includes:

1 x Square 6M Float Switch For Industry Pump Tank Sensor

This Gravity: Liquid Flow Sensor is designed based on the electromagnetic principle. It adopts O-ring rubber seal and uses silicone sealant at the outlet end to ensure good waterproofness. Also, it embraces high anti-electromagnetic interference and anti-vibration capabilities, offering reliable performance and long service life. The sensor can be used with microcontrollers like ARDUINO UNO to measure the flow of liquids with high concentration and low viscosity like water, diesel, engine oil, milk, paint, detergent, honey, etc. (no impurity in liquid)

Use this flow sensor to measure the rate of the flow of liquids. The sensor has a digital interface which makes it simple and easy to connect it to a microcontroller, Arduino, or Raspberry Pi. It requires no extra circuit to start measuring liquid flow rate. The sensor will have to be attached in the liquid line whose flow is to be measured. A pinwheel inside the sensor moves as the liquid flows through the sensor.

Features:

1. Gravity interface, easy to wire
2. Wide voltage of 3.5~24V
3. Measure the flow of the high-concentration but low-viscosity liquid
4. RoHS compliant

Specifications:

1. Operating Voltage: DC 3.5~24V
2. Operating Current: ≤10mA (DC5V)
3. Output Mode: NPN pulse signal
4. Pipe Diameter: G1/2
5. Thread I.D.: 10mm
6. Thread O.D.: 20.5mm
7. Thread Length: 29mm
8. Water Pressure Resistance: ≤1.2MPA
9. Insulation Resistance: >100MΩ
10. Flow Range: 30-1200L/H
11. Error: ±1% (5-600L/H)
12. Output Pulse High Level: >DC4.7V (input voltage DC5V)
13. Output Pulse Low Level: ＜DC0.5V (input voltage DC5V)
14. Output Pulse Duty Ratio: 50%±10%
15. Flow & Pulse Correlation: 1L=150 pulses
16. Operating Temperature: ≤80°C
17. Operating Humidity: 35%~90%RH (No condensing)
18. Storage Temperature: -25°~+80°C
19. Storage Humidity: 25%~95%RH

Package Includes:

1 x DFRobot Gravity Liquid Flow Sensor (G1/2)