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Corrosion Resistance Water Quality Monitoring Sensors Measurement Range 0 - 14 PH

Corrosion Resistance Water Quality Monitoring Sensors Measurement Range 0 - 14 PH

  • Corrosion Resistance Water Quality Monitoring Sensors Measurement Range 0 - 14 PH
  • Corrosion Resistance Water Quality Monitoring Sensors Measurement Range 0 - 14 PH
Corrosion Resistance Water Quality Monitoring Sensors Measurement Range 0 - 14 PH
Product Details:
Place of Origin: China
Brand Name: Kacise
Certification: CE
Model Number: KBU601
Payment & Shipping Terms:
Minimum Order Quantity: 0-100
Price: Negotiable
Packaging Details: each unit has individual box and all boxes are packed in standard packages or customers requests available
Delivery Time: 5-8 working days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram, Paypal
Supply Ability: 100
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Detailed Product Description
Signal Output: RS-485 (Modbus/RTU Protocol) Measuring Range: 0~14pH
Temperature Range: 0 ~ 65℃ Work Pressure: <0.2MPa
Power Consumption: <0.5W Ip Grade: IP68
Power Supply: 12~24VDC ±10% Wetted Part Material: PPR
High Light:

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oil in water sensor

HACH  KWS-700 Online pH Sensor

 

                                              

 

 

Introduction

KWS-700 online pH sensor is used in environmental water quality monitoring, acid/alkali/salt solution, chemical reaction process, industrial production process, it can meet the requirements of online pH measurement for most industrial applications.

 

 

Feature
 
Signal output: RS-485 (Modbus/RTU protocol).
Convenient connection to third-party equipment such as PLC, DCS, industrial control computer, general controller, paperless recording   instrument or touch screen.
 Double high-impedance differential amplifier with strong anti-interference and fast response.
 The patented pH probe, the internal reference solution oozes very slowly from the microporous salt bridge under the pressure of at least 100KPa   (1Bar), and its forward bleed continues for more than 20 months. Such a reference system is very stable and the electrode life is extended by a   factor of two compared to conventional industrial electrodes.
Easy to install: 3/4 NPT pipe thread for easy submersible installation or installation in pipes and tanks.
 
Technical Specifications
Model KWS-700
Measuring Range 0~14pH
Accuracy ±0.1pH
Resolution 0.01pH
Temperature Range 0 ~ 65℃
Work Pressure <0.2MPa
Temperature Compensation automatic temperature compensation
Output RS-485, MODBUS protocol
Power Supply 12~24VDC ±10%
Wetted Part Material PPR
Installation Immersion mounting, 3/4 NPT thread
Cable Length 5 m, customizable
Calibration Method Two-point calibration
Power Consumption <0.5W
Ip Grade IP68

 

Dimension

Corrosion Resistance Water Quality Monitoring Sensors Measurement Range 0 - 14 PH 0

 

Installation and Electrical Connection

 

Installation

 

Corrosion Resistance Water Quality Monitoring Sensors Measurement Range 0 - 14 PH 1

 

Note: The sensor should not be installed upside down or horizontally when installed, at least at an angle of 15 degrees or more.

 

 

 
Wiring
a) Red line - power cord (12 ~ 24V)
 
b) Black line - ground (GND)
 
c) Blue line - 485A
 
d) White line - 485B
 
e) Bare wire - shielded wire
 
After wiring is completed, it should be carefully checked to avoid incorrect connections before powering up.

 

Cable specification: Considering that the cable is immersed in water (including sea water) for a long time or exposed to the air, the cable has certain corrosion resistance. The outer diameter of the cable is Φ6 mm and all interfaces are waterproof.

 

Maintenance

Use and maintenance
When measuring the pH sensor, it should be cleaned in distilled water (or deionized water), and the filter paper should be used to absorb moisture to prevent impurities from being introduced into the liquid to be tested. 1/3 of the sensor should be inserted into the solution to be tested.
The sensor should be washed when not in use, inserted into a protective sleeve with a 3.5 mol/L potassium chloride solution, or the sensor inserted into a container with a 3.5 mol/L
potassium chloride solution.
Check if the terminal is dry. If it is stained, wipe it with absolute alcohol and dry it. Avoid long-term immersion in distilled water or protein solution and prevent contact with silicone grease. With a longer sensor, its glass film may become translucent or with deposits, which can be washed with dilute hydrochloric acid and rinsed with water. The sensor is used for a long time. When a measurement error occurs, it must be calibrated with the meter for calibration.
When the calibration and measurement cannot be performed while the sensor is being maintained and maintained in the above manner, the sensor has failed. Please replace
the sensor.

 

Standard Buffer Ph Reference Table

Temp(°C ) 4.00 4.01 6.86 7.00 9.18 10.01
0 4.00 4.00 6.98 7.12 9.46 10.32
5 4.00 4.00 6.95 7.09 9.39 10.25
10 4.00 4.00 6.92 7.06 9.33 10.18
15 4.00 4.00 6.90 7.04 9.28 10.12
20 4.00 4.00 6.88 7.02 9.23 10.06
25 4.00 4.01 6.86 7.00 9.18 10.01
30 4.01 4.02 6.85 6.99 9.14 9.97
35 4.02 4.02 6.84 6.98 9.17 9.93
40 4.03 4.04 6.84 6.97 9.07 9.89
45 4.04 4.0 5 6.83 6.97 9.04 9.86
50 4.06 4.06 6.83 6.97 9.02 9.83
 
The actual reading and standard of the instrument sometimes have an error of ±1 digit.
 
 
Calibration
Note: the sensor has been calibrated at the factory, if not exceeding the measurement error, the calibration should not be random.
 
 
a) Zero calibration
 
Use 250 mL of distilled water in a measuring cylinder,pour into a beaker, add a packet of calibration powder with pH=6.86 , stir evenly with a glass rod until the powder is completely dissolved, configure the solution with pH=6.86 , put the sensor into the solution, wait for 3 ~ 5 minutes, after the value is stable, see if the displayed value is 6.86 . If not, you need to perform zero calibration. Refer to the appendix for calibration instructions .
 
b) Slope calibration
 
For acidic solution: Take 250 mL of distilled water in a measuring cylinder , pour into a beaker, add a packet of calibration powder with pH=4.00 , stir evenly with a glass rod until the powder is completely dissolved, and configure the solution topH=4.00 ; In the solution, wait for 3 to 5 minutes. After the value is stable, see if the value is 4.00 . If not, the slope calibration is required. Refer to the appendix for the calibration instructions.
 
For alkaline solution: Take 250 mL of distilled water in a measuring cylinder , pour into a beaker, add a packet of calibration powder with pH=9.18 , stir evenly with a glass rod until the powder is completely dissolved, and configure the solution to pH=9.18 ; Into the solution, wait for 3 to 5 minutes. After the value is stable, see if the display is 9.18 . If not, the slope calibration is required. Refer to the appendix for the calibration instructions.
 
Quality and service
 
Quality assurance
 
Quality inspection departments have standardized inspection procedures, with advanced detection equipment and instruments, and in strict accordance with the test procedures for products that do 72 hours aging test, stability test, not asubstandard products factory.
 
The receiving party directly returns the product batch with a failure rate of 2% , and all the costs incurred are borne by the supplier. The reference standard refers to the product description provided by the supplier.
 
Guarantee the quantity of goods and the speed of shipment.
 

Service commitment

 

The company provides local after-sales service within one year from the date of sale, but does not include damage caused by improper use. If repair or adjustment is required, please return it, but the shipping cost must be conceited. Damaged on the way, the company will repair the damage of the instrument for free.

 
Appendix data communication
 
1. Data Format
 
The default data format for Modbus communication is: 9600, n, 8, 1 (baud rate 9600bps, 1 start bit, 8 data bits, no parity, 1 stop bit).
 
Parameters such as baud rate can be customized.
 
2. Information Frame Format
 
a) Read data instruction frame
 
06 03 xx xx xx xx xx xx
 
Address Function code Register address Number of registers CRC check code (low byte first)
 
b) Read data response frame
 
06 03 xx xx...... xx xx xx
 
Address Function code Bytes Answer data CRC check code (low byte first)
 
c) Write data instruction frame
 
06 06 xx xx xx xx xx xx
 
Address Function code Register address Write data CRC check code (low byte first)
 
d) Write data response frame (same data command frame)
 
06 06 xx xx xx xx xx xx
 
Address Function code Register address Write data CRC check code (low byte first)
 
3.Register Address
 

Register

Address

Name Description

Number Of

Registers

Interview

Method

40001

 

(0x0000)

 

Measured value

 

 

+temperature

4 double-byte integers, which

are the measured value, the measured number of decimal places, the temperature value, and the decimal value of the temperature value.

 

4 ( 8 bytes)

 

read

44097

 

(0x1000)

 

Zero calibration

Calibrated in a standard solution

with a pH of 6.86, writing data to 0

 

1 ( 2 bytes)

 

write

44099

 

(0x1002)

Slope calibration

 

(4pH)

Calibrated in a standard solution

with a pH of 4.00, writing data to 0

1 ( 2 bytes) write

 

44101

 

(0x1004)

Slope calibration

 

(9.18pH)

Calibrated in a standard solution

with a pH of 9.18, writing data to

1 ( 2 bytes) write

44103

 

(0x1006)

Zero calibration

value

The data is read out as a zero

offset.

1 ( 2 bytes) read

44105

 

(0x1008)

Slope calibration

value

The read data is the slope value

x1000 .

1 ( 2 bytes) read

44113

 

(0x1010)

Temperature

calibration

Calibrated in solution, the data

written is the actual temperature value x10 ; the read data is the temperature calibration offset x10 .

1 ( 2 bytes) Write /read

48195

 

(0x2002)

Sensor address

The default is 6 and the data

range is 1-127 .

1 ( 2 bytes) Write /read

48225

 

(0x2020)

Reset sensor

The calibration value is restored

to the default value and the write data is 0. Note: the sensor needs to be calibrated again after resetting.

1 ( 2 bytes) write

 

Note:
 
a) Modbus register address according to the protocol defined with the register type register start address (16 hex represents the actual starting address register in parentheses).
 
b) When changing the sensor address, the sensor address in the return command is the changed new address.
 
c) The data definition that returns the measured value when reading data:
 
xx xx xx xx xx xx Xx xx
2- byte measurement 2 bytes measurement 2 bytes temperature value 2 bytes temperature scale
Value scale number
 
The data type defaults to: double-byte integer, high byte first; others are optional as floating-point types.
 
4.Command example
 
 

a) Read data instruction

Function: Obtain the pH and temperature of the measuring probe; the unit of pH is pH; the unit of temperature is °C.

Request frame: 06 03 00 00 00 04 45 BE ;

Response frame: 06 03 08 00 62 00 02 01 01 00 01 24 59

 

Example of reading:

pH value Temperature value
00 62 00 02 01 01 00 01

 

pH: 00 62 indicates the hexadecimal reading pH value, 00 02 indicates that the pH value has 2 decimal places and is converted to a decimal value of 0.98 .

Temperature value: 01 01 indicates the hexadecimal reading temperature value, 00 01 indicates that the temperature value has 1 decimal place and is converted to a decimal value of 25.7

 

b) Calibration instructions:

Zero calibration

Function: Set the pH zero calibration value of the electrode. The zero value is based on the 6.86 pH standard. The examples are as follows;

Request frame: 06 06 10 00 00 00 8C BD

Response frame: 06 06 10 00 00 00 8C BD Slope calibration
Function: Set the pH slope calibration value of the electrode; the slope calibration is divided into high point and low point calibration, and the alkaline solution is measured at the high point; the acidic solution is measured at the low point, where the standard solution is high here. point 9.18pH, low 4.00pH standard solution of the calibration reference, examples are as follows:

High point standard solution 9.18 pH calibration: Request frame: 06 06 10 04 00 00 CD 7C
Response frame: 06 06 10 04 00 00 CD 7C Low standard solution 4.00 pH calibration: Request frame: 06 06 10 02 00 00 2D 7D
Response frame: 06 06 10 02 00 00 2D 7D

 

c) Set the device ID address:

Role: set the MODBUS device address of the electrode; Change the device address 06 to 01. The example is as follows Request frame: 06 06 20 02 00 01 E3 BD
Response frame: 06 06 20 02 00 01 E3 BD

 

5. Error response

If the sensor does not execute the host command correctly, it will return the following format information:

 

Definition address function code CODE CRC check
data ADDR COM+80H Xx CRC 16
Number of bytes

 

1

 

1

 

1

 

2

 

a) CODE : 01 – function code error

                 03 – data is wrong

b) COM : Received function code

 

 

Field application example

 

Corrosion Resistance Water Quality Monitoring Sensors Measurement Range 0 - 14 PH 2

 
 

Contact Details
Xi'an Kacise Optronics Co.,Ltd.

Contact Person: Sales

Tel: +8618092442834

Send your inquiry directly to us (0 / 3000)

Contact

Address: i City, No11, TangYan South road, Yanta District, Xi'an,Shaanxi,China.

Factory Address:i City, No11, TangYan South road, Yanta District, Xi'an,Shaanxi,China.