# Level and Liquid Sensors

> Sensors for water level, flow, leak detection, water quality (TDS, pH) and soil moisture with relay modules

- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Category page: https://sigmanortec.ro/en/level-sensors
- Category: Mechatronics and IoT > Sensors and Modules > Level and Liquid Sensors
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:32 (Europe/Bucharest)

## Products (11)

### Water level sensor, YB-2J-F, 12-32V, 4-20mA, IP68, 0-3m
- Page: https://sigmanortec.ro/en/water-level-sensor-yb-2j-f-12-32v-4-20ma-ip68-0-3m
- Details: https://sigmanortec.ro/en/llms/p/2095.md
- Price: 358.96 RON
- Availability: Out of stock
- Reference: 9927 · EAN: 5945318425624
- Specifications: Supply Voltage: 12 VDC; Maximum Input Voltage: 32 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Submersible water level transmitter YB-2J-F, range 0-3m, pressure-based. Supply 12-32V DC, output 4-20mA, stainless steel 304 housing, IP68 protection. Accuracy ±0.5% FS, thermal compensation -10°C...70°C, cable length 5 meters, probe dimensions 108x28mm, weight 900g. Suitable for integration with PLC or SCADA in tanks and wells.

### Water level control relay module, 9-12V, automatic
- Page: https://sigmanortec.ro/en/water-level-control-relay-module-9-12v-automatic
- Details: https://sigmanortec.ro/en/llms/p/2106.md
- Price: 38.90 RON
- Availability: In stock; 1-2 zile
- Reference: 9938 · EAN: 5948664340863
- Specifications: Supply Voltage: 9; Maximum Input Voltage: 12; Output Type Voltage: Closed-Open Contact; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Water level control relay module (ref. 9938), operates automatically at 9-12V AC or DC. Uses 3 electrodes (GND, minimum level, maximum level) to detect liquid level and drive a relay with open-close contact output, rated up to 10A, controlling power of 0-1KW at 220V. Features screw terminals for quick wiring without soldering. Board dimensions: 60 x 50 x 25 mm.

### TDS sensor module, water quality, analog probe, 3.3-5V
- Page: https://sigmanortec.ro/en/tds-sensor-module-water-quality-analog-probe-33-5v
- Details: https://sigmanortec.ro/en/llms/p/2325.md
- Price: 28.47 RON
- Availability: In stock; 1-2 zile
- Reference: 88155 · EAN: 5942950913656
- Specifications: Input Voltage: 3.3 - 5 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Output signal type: Analogic

TDS sensor module for measuring water conductivity and estimating TDS, with a stainless steel probe (length ~60 mm, diameter 12 mm, cable ~60 cm). Power supply 3.3-5.5 VDC, current 3-6 mA, analog output 0-2.3V, measuring range 0-1000 ppm, accuracy ±10% F.S. (25°C), operating temperature 5~55°C. Module dimensions 41.7 x 32.2 mm. Suitable for aquariums, hydroponics and educational projects with Arduino.

### Water Leak Detection Probe, WLS02, Stainless Steel Electrode, 12-24V, NO, 1m Cable
- Page: https://sigmanortec.ro/en/water-leak-detection-probe-wls02-stainless-steel-electrode-12-24v-no-1m-cable
- Details: https://sigmanortec.ro/en/llms/p/2326.md
- Price: 59.67 RON
- Availability: In stock; 1-2 zile
- Reference: 88158 · EAN: 5944792544753
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 12 - 24 VDC; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Material: Inox; Cable length: 1 m

Passive water leak detection probe WLS02 with corrosion-resistant stainless steel electrode, suitable for use in salt water as well. Operates based on the conductivity of water between two electrodes, signaling the presence of liquid to an external module (relay, PLC, Arduino). Input voltage 12-24 VDC, NO type output via external module, 1 m cable. Suitable for mounting in technical rooms, basements or under equipment.

### Water level sensor, liquid
- Page: https://sigmanortec.ro/en/water-level-sensor-liquid
- Details: https://sigmanortec.ro/en/llms/p/656.md
- Price: 1.78 RON
- Availability: In stock; 1-2 zile
- Reference: 22016 · EAN: 5948782332375

Water/liquid level sensor module, analog type, compatible with Arduino development boards. Operating voltage 3-5V, operating current >20mA, detection area 40mm x 16mm, operating temperature 10-30 degrees Celsius, dimensions 62mm x 20mm x 8mm. Suitable for liquid level measurement in automation and alarm projects.

### Liquid flow meter sensor, G3/4, 1-60L/min
- Page: https://sigmanortec.ro/en/liquid-flow-meter-sensor-g3-4-1-60l-min
- Details: https://sigmanortec.ro/en/llms/p/633.md
- Price: 67.38 RON
- Availability: In stock; 1-2 zile
- Reference: 22173 · EAN: 5943645005083

Liquid flow meter sensor FS300A with G3/4 connection, measuring water flow between 1 and 60 L/min. Power supply 5VDC, maximum operating current 15mA. Maximum operating temperature 80°C, allowed pressure 1.2 MPa. Outer diameter 26mm, inner diameter 16mm. Compatible with Arduino and other development boards, suitable for automation and water volume measurement projects.

### Flow sensor 0.3-6l/min, YF-S401, 120 degrees
- Page: https://sigmanortec.ro/en/flow-sensor-03-6l-min-yf-s401-120-degrees
- Details: https://sigmanortec.ro/en/llms/p/883.md
- Price: 26.80 RON
- Availability: In stock; 1-2 zile
- Reference: 9076 · EAN: 5945936570706

YF-S401 flow sensor for liquids, measures flow rate between 0.3 and 6 l/min, using a stainless steel ball rotor and Hall sensor, PWM signal output on the yellow wire. Supply voltage 6V, maximum current 15mA at 5V, supported pressure 

### PH Meter 0-14 probe with module
- Page: https://sigmanortec.ro/en/ph-meter-0-14-probe-with-module
- Details: https://sigmanortec.ro/en/llms/p/510.md
- Price: 139.54 RON
- Availability: In stock; 1-2 zile
- Reference: 33095 · EAN: 5946141144904

Module with probe for measuring the pH of liquids between 0 and 14, compatible with Arduino and other development boards. Supply voltage 5V, current 5-10mA, analog signal output, response time 5S, calibration time 60S, detection temperature range 0-80 C. Module dimensions 42 x 32 x 20 mm. Suitable for pH monitoring of water in aquariums, hydroponics or IoT projects, calibration via potentiometer.

### Capacitive hygrometer sensor, soil moisture, 5V, v2.0
- Page: https://sigmanortec.ro/en/capacitive-hygrometer-sensor-soil-moisture-5v-v20
- Details: https://sigmanortec.ro/en/llms/p/644.md
- Price: 5.45 RON
- Availability: In stock; 1-2 zile
- Reference: 33263 · EAN: 5949876275011
- Specifications: Input Voltage: 5V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Capacitive hygrometer sensor for measuring soil moisture, version 2.0. Supply voltage 3.3-5VDC, analog output proportional to moisture, current consumption approximately 5mA, 3 pins, dimensions 98 x 23mm. No exposed metal electrodes, suitable for long-term Arduino projects or irrigation automation. Note: when powered at 5V, output may exceed 3.3V on 3.3VDC boards.

### 7 in 1 Soil Sensor (N, P, K, pH, EC, Moisture, Temperature), RS485, 5–30V
- Page: https://sigmanortec.ro/en/7-in-1-soil-sensor-n-p-k-ph-ec-moisture-temperature-rs485-530v
- Details: https://sigmanortec.ro/en/llms/p/2345.md
- Price: 447.54 RON
- Availability: In stock; 1-2 zile
- Reference: 88159 · EAN: 5947374297290
- Specifications: Supply Voltage: 5; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Communication interface: RS485; Measured parameters: N, P, K, pH, EC, Umiditate, Temperatura

Quickly monitor essential soil parameters for precise fertilization and irrigation, measuring N, P, K, pH, EC, moisture, and temperature in a single device, RS485 Modbus RTU communication for easy integration into SCADA or IoT projects, 316 stainless steel probes and IP68 sealed housing for long-term use, wide 5–30V power supply with low consumption.
The NPKPHCTH-S sensor is a complete soil monitoring solution, integrating the simultaneous measurement of nine parameters in a single device: humidity, temperature, electrical conductivity (EC), pH, nitrogen (N), phosphorus (P), potassium (K), salinity, and TDS (total dissolved solids).

### Soil moisture sensor, hygrometer
- Page: https://sigmanortec.ro/en/soil-moisture-sensor-hygrometer
- Details: https://sigmanortec.ro/en/llms/p/676.md
- Price: 4.15 RON
- Availability: In stock; 1-2 zile
- Reference: 22085 · EAN: 5946730579711

Soil moisture sensor (hygrometer) compatible with Arduino and other development boards. Provides analog (AO) and digital (DO, 0 and 1) output, uses the LM393 comparator chip and operates at VCC 3.3V-5V. PCB dimensions: 30 x 15 mm, sensor dimensions: 60 x 20 mm. Includes a dupont cable for connection.