Water Conductivity Monitoring Solution Datasheet

Solution Overview

Description

The Water Conductivity Sensor Solution is an ideal tool for monitoring water conductivity, comprising the RAK Sensor Hub and the JXBS-3001-TDS sensor. This comprehensive monitoring system is suitable for use in various settings, such as thermal power, chemical fertilizers, and biochemical industries.

With the plug-and-play feature of the Sensor Hub, the Water Conductivity Solution includes pre-installed components ready for easy installation and connection. The sensor provides highly accurate water conductivity readings, while the Sensor Hub collects and transmits the data via LoRaWAN or NB-IoT/CAT M1.

The Sensor Hub’s connectivity function allows for versatile data transmission to the cloud using the two most commonly used communication protocols in IoT. This versatility ensures that data is readily available for storage, visualization, and in-depth analysis, enabling informed decision-making based on comprehensive knowledge of water conductivity.

Features

• Supports LoRa and NB -IoT/LTE CAT-M wireless communication modes
• Supports LoRa frequency band: CN470/ EU868/ IN865/ RU864/ US915/ AU915/ KR920/AS923-1/2/3/4
• Low power consumption
• Accurate measurement
• Imported detection chip for fast response
• Good stability against high temperature and high pressure
• Small zero drift and good repeatability
• Strong anti-interference ability
• Stable, reliable and accurate detection
• Remote cloud alarm monitoring
• Waterproof
• Configurable network access with the WisToolBox mobile app

Specifications

Sensor Hub Specifications

For more detailed information about the Sensor Hub, refer to the Sensor Hub Datasheet.

Sensor Probe IO + Water Conductivity Sensor Specifications

Sensor Probe IO Datasheet

• For details, refer to the Probe IO Datasheet.

JXBS-3001-TDS Water Conductivity Sensor Datasheet

Water Conductivity Datasheet

PARAMETER			VALUES
Transmitter	DC Power Supply		12 - 24 VDC
	Power Consumption		≤ 0.15 W (@12 VDC, 25° C)
	Output Signal		485/4-20 mA/0-10 V
	Dimensions		110 mm × 85 mm × 44 mm
Probe	Application Scenarios		Tap water, river water
	Electrode		JXDDL
	Model		K100
	K value		K=1
	Electrode Material		Stainless steel
	Mounting Thread		1/2 thread
	Cable Length		5 meters (default)
	Response Speed		≤ 15 s
	Conductivity	Measuring Range	0 - 2000 us/cm
		Measurement Precision	3%Fs
		Resolution	0.01 us/cm
	Temperature	Measuring Range	-20° C - 80° C
		Measurement Precision	0.1° C
		Resolution	0.1° C

Solar Cell System Datasheet

Definition of Terms

List of Abbreviations

Abbreviation	Definition
BMS	Battery Management System
BMU	Battery Management Unit
BOL	Begin of Life
Bus-bar	Battery Pole Connecting Rod
CMC	Cell Manager Circuit
EOL	End of Life
HV	High Voltage
LV	Low Voltage
OCV	Open Circuit Voltage
SOC	State of charge

Terminologies

Terminology	Definition
Battery Cell	Commonly known as a battery. It is the fundamental unit of energy storage, which converts chemical energy to electrical energy.
Battery Module	The intermediate energy storage unit comprises several individual cells, circuitry components, and electrical and communication interfaces.
Battery Pack	A comprehensive power system consisting of multiple battery modules and circuits working together to supply power to electrical devices.
Rated Voltage	Refers to the approximate voltage value that a battery is designed to operate at or provide.
Capacity	The amount of electrical charge that a fully charged battery can store and subsequently provide to a device or system. Unit: Ampere-hours (Ah)
Energy Capacity	The total amount of energy that a fully charged battery can deliver under specific conditions. Unit: Watt-hours (Wh) or kilowatt-hours (kWh)
Rated Capacity	At the beginning of life (BOL), the minimum capacity that a fully charged battery can provide at a discharge rate of 1 C (discharge C-rate).
Unit	V: Volt, voltage
	A: Ampere, current
	Ah: Ampere-hour, electric charge
	Wh: Watt-hour, electrical energy
	Ω: Ohm, resistance
	° C: Celsius, temperature
	mm: millimeter, length
	s: second, time
	kg: kilogram, weight
	Hz: Hertz, frequency

Main Specifications

PARAMETER	TECHNICAL SPECIFICATIONS	REMARK
Battery Model	RAK9154
Battery Cell Model	Rechargeable cylindrical lithium-ion battery H18650CH	H18650CH or products of the same level
Rated Capacity	5200 mAh	5.2 Ah
Rated Voltage	10.8 V	Single cell voltage 3.6 V
Operating Voltage Range	9 V - 12.6 V
Rated Power	56.16 Wh
SOC Transportation Range	0.5
Operating Temperature	Charging temperature: 0° C - 45° C
	Discharging temperature: -20° C - 60° C
Storage Temperature	-20° C - 60° C	Over 3 months @ 25° C
Operating Humidity	20 - 80%RH
PV input	18 V/1.0 A	Typical
Maximum PV Input Voltage	30 V	Open circuit voltage
Maximum Charging Continuous Current	0.2 C (1.0 A)	Limited by solar chargers
Maximum Discharge Continuous Current	0.4 C (2.0 A)
∆ Voltage	≤ 20 mV	Rest for at least 2 hours after charging or discharging
Weight	0.85 kg
Size	Length: 180 (±3) mm Width: 130 (±3) mm Height: 60 (±3) mm

Interfaces

Battery System Structure

As shown in Figure 1, the RAK9154 battery system comprises two sets of three 2600 mAh battery units connected in series. The system also incorporates one (1) BMS board integrated with an 18 V input solar charger.

Figure 1: RAK9154 battery system

Electrical Characteristics

Figure 1: RAK9154 electrical diagram

Figure 1: System circuit schematic

Connector	Connector Socket Model	Connector Plug Model	Definition	Remark
Gateway Load	SP1110/P4	SP1110/P4-N	Pin1: P+	SP11 IP67 Rated current 2 A Contact diameter 0.75 mm * 4
			Pin2: P-
			Pin3: R485A
			Pin4: RS485B
Sensor Hub Load	SP1110/P5	SP1110/P5-N	Pin1: P+	SP11 IP67 Rated current 2 A Contact diameter 0.75 mm * 4
			Pin2: P-
			Pin3: TXD
			Pin4: 3V3_In
			Pin5: RXD
PV Input	SP1110/P2	SP1110/P2-N	Pin1: PV+	SP11 IP67 Rated current 1 A Contact diameter 0.75 mm * 4
			Pin1: PV-

Sensor Characteristics

The following table shows the sensor data definition and the data format of the Water Conductivity Solution.

• Sensor Data Definitions

REGISTER NAME	FUNCTION CODE	DATA LENGTH	RANGE	UNIT
Water Temperature	0x67	2	-20 - 80° C	° C
Water Conductivity	0x67	2	0 - 2000 us/cm	us/cm

• Data Format

	ID (Channel)	Type	Data
Water Temperature Data Unit	1 byte	1 byte	2 bytes
Water Conductivity Data Unit	1 byte	1 byte	4 bytes

Data Sample (Water Temperature):

Payload (hex) received data: 15 67 00 fa

Water Temperature Data Unit
ID (Channel)	Type	Data
15	67	00 fa

Convert the sensor data from hexadecimal to decimal:

• Water Temperature: 1567
• Data: 00fa

00fa (hex) = 250 (dec)
250 x 0.01 (conversion factor) = 25.0° C

NOTE

The temperature value data monitored by the sensor needs to be converted according to the temperature conversion ratio, which is 0.1 in this example.

Data Sample (Water Conductivity):

Payload (hex) received data: 16 7f 00 03 a0 8e

Water Conductivity Data Unit
ID (Channel)	Type	Data
16	7f	00 03 a0 8e

• Water Conductivity Sensor: 167f
• Data: 0003a08e

0003a08e (hex) = 237710 (dec)
237710 x 0.001 (conversion factor) = 237.710 us/cm