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High Quality Waterproof RS485 PT100 K-type thermocouple DS18B20 Temperature Sensor Probe

$25.00 USD
$25.00 USD
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High Quality Waterproof RS485 PT100 K-type thermocouple DS18B20 Temperature Sensor Probe

Product overview

CWT-TS-XX series R485 temperature transmitter uses low power consumption ST microcontroller to collect temperature in real time, It can be easily networked with computer monitoring host or other industrial computer，output temperature value by RS485，It has the characteristics of accuracy, stability and long life.



Features

• Wide voltage supply and low power consumption.

• High sensitivity, good stability, full range automatic temperature compensation.

• Standard RS485 output，TVS and self - recovery fuse are added to enhance its stability, RS485 achieves long-distance communication.

• Support standard Modbus-RTU protocol and use widely used in the industrial field.

Technical parameters

• Power supply: DC5-30V

• Power consumption: ＜0.1W

• IP68 protection，Waterproof, dustproof, can be put underground

• RS485 digital output/Modbus-RTU protocol

• Device address: 1~247

• Baud rate: 1200、2400、4800、9600、19200

• 8 data bits, 1 stop bit, none parity

• Default length of temperature probe cable: 3 meters



Equipment selection



Dimensional Drawing



Wiring

Color

Description

Red

Power+

black

Power-

yellow

RS485+

green

RS485-


RS485 parameters

Default slave ID: 1

Default baud rate: 9600,

8 data bits, 1 stop bit, none parity

Modbus registers map：

Read status registers, read function code: 0x30

Register
address (DEC)

Meaning

Number of bytes

Unit

Description

2001

Temperature

2

0.01℃

Output value

Parameters registers, read function code: 0x30, write function code: 0x06

3001

Slave ID

2

1

1-247（default is 1）

3002

Baud rate

2

1

Integer multiples of 1200

Default is 8 (rate=9600)

3007

Temperature unit

2

1

0: Celsius (default)

1: Fahrenheit

3011

Calibration value

2

1

Output value=Collection value -
Calibration value

default calibration value=0


E.g., master read temperature:

Address

Function

Code

Start

Address

(Hi)

Start

Address

(Lo)

Number

of

Points
(Hi)

Number

of

Points
(Lo)

Error

Check

(Lo)

Error

Check

(Hi)

0x01

0x03

0x07

0xD0

0x00

0x01

0x84

0X87


Transmitter responds:

Address

Function

Code

Number
of

byte

Temperature

value

Error

Check
(Lo)

Error

Check
(Hi)

0x01

0x03

0x02

0x08

0x53

0xFF

0xB9


Temperature calculates:

Temperature: 0853 H=2131 => temperature= 21.31℃

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