The one produced by Huaju can completely replace the DS18B20 produced by MAXIM by PIN TO PIN. The DS18B20 temperature sensor is easy to wire and can be used in a variety of situations after being packaged, such as pipe type, threaded type, magnet adsorption type, stainless steel packaging type, and various models. , there are LTM8877, LTM8874 and so on. Its appearance mainly changes depending on the application. The encapsulated DS18B20 temperature sensor can be used for cable trench temperature measurement, blast furnace water circulation temperature measurement, boiler temperature measurement, computer room temperature measurement, agricultural greenhouse temperature measurement, clean room temperature measurement, ammunition depot temperature measurement and other non-limit temperature occasions. Wear-resistant and impact-resistant, small in size, easy to use, with various packaging forms, it is suitable for digital temperature measurement and control of various small space equipment.

　　1: Technical performance description

　　①. Unique single-wire interface method. When the DS18B20 temperature sensor is connected to the microprocessor, it only needs one port line to achieve two-way communication between the microprocessor and the DS18B20 temperature sensor.

　　②. Temperature measurement range -55℃～+125℃, inherent temperature measurement resolution 0.5℃.

　　③. Support multi-point networking function. Multiple DS18B20 temperature sensors can be connected in parallel on the only three lines. Only 8 can be connected in parallel to achieve multi-point temperature measurement. If there are too many, the power supply voltage will be too low, causing Instability of signal transmission.

　　④. Working power supply: 3~5V/DC

　　⑤. No external components are required during use.

　　⑥. The measurement results are transmitted serially in the form of 9~12-digit digital quantities.

　　⑦, Stainless steel protection tube diameter Φ6

　　⑧ Suitable for temperature measurement of DN15~25, DN40~DN250 various medium industrial pipelines and narrow space equipment

　　⑨. Standard mounting thread M10X1, M12X1.5, G1/2” optional

　　⑩, PVC cable outlet directly or German ball junction box outlet, easy to connect with other electrical equipment.

　　DS18B20 temperature sensor application range

　　2.1 This product is suitable for temperature measurement and control fields such as freezers, granaries, storage tanks, telecommunications equipment rooms, power equipment rooms, cable trunking, etc.

　　2.2 Temperature measurement and control of industrial equipment in small spaces such as bearings, cylinders, textile machinery, air conditioners, etc.

　　2.3 Automotive air conditioners, refrigerators, freezers, and medium and low temperature drying boxes, etc.

　　2.4 Heating/cooling pipeline heat measurement, central air-conditioning household heat energy measurement and temperature measurement and control in the industrial field

　　describe

　　DS18B20 is a commonly used digital temperature sensor. It outputs a digital signal and has the characteristics of small size, low hardware overhead, strong anti-interference ability and high accuracy. The DS18B20 digital temperature sensor is easy to wire and can be used in a variety of situations after being packaged, such as pipe type, threaded type, magnet adsorption type, stainless steel package type, with various models. The DS18B20 temperature sensor provides 9 to 12 bits (programmable device Temperature reading. Information is sent to/from the DS18B20 temperature sensor through a 1-wire interface, so the central microprocessor has only one line connection to the DS18B20 temperature sensor and can obtain power from the data line itself for reading, writing, and temperature conversion, no external connections are required. Power supply. Because each DS18B20 temperature sensor contains a unique serial number, multiple DS18B20 temperature sensors can exist on a bus at the same time. This allows the DS18B20 temperature sensor to be placed in many different places, including air conditioning and environmental control. Measure the internal temperature of equipment or machines in buildings, and perform process monitoring and control. The appearance of the encapsulated DS18B20 can be used for cable trench temperature measurement, blast furnace water circulation temperature measurement, boiler temperature measurement, and machine room temperature measurement. , agricultural greenhouse temperature measurement, clean room temperature measurement, ammunition depot temperature measurement and other non-extreme temperature occasions. It is wear-resistant and impact-resistant, small in size, easy to use, and has various packaging forms. It is suitable for digital temperature measurement and control of various small space equipment. field.

　　Wiring instructions

　　The DS18B20 temperature sensor features a unique one-line interface, requiring only one port line to communicate with multiple points, simplifying distributed temperature sensing applications. No external components are required. It can be powered by the data bus, and the voltage range is 3.0 V to 5.5 V. No backup power supply is required. The measurement temperature range is -55°C to +125°C. Fahrenheit equivalent is 67°F to 257°F -10°C to +85°C with accuracy of ±0.5°C Temperature sensor programmable resolution 9~12 bits Temperature conversion to 12-bit digital format Maximum value 750 Millisecond User Definable Non-Volatile Temperature Alarm Setting Applications include thermostat controls, industrial systems, consumer electronics thermometers, or any heat sensitive system

　　Description The DS18B20 temperature sensor provides 9 to 12 bit (programmable) device temperature readings. Information is sent to/from the DS18B20 temperature sensor through a 1-wire interface, so the central microprocessor has only a one-wire connection to the DS18B20 temperature sensor. For reading and writing And the temperature conversion can obtain energy from the data line itself, no external power supply is required. Because each DS18B20 temperature sensor contains a unique serial number, multiple DS18B20 temperature sensors can exist on the same bus at the same time. This allows the DS18B20 temperature sensor to be placed on many different devices. place. Its uses are many, including air conditioning environment control, sensing the internal temperature of building equipment or machines, and process monitoring and control.

　　Appearance structure and dimensions:

DS18B20 temperature sensor DS18B20 temperature measuring element

　　Introduction of One Single Wire Digital Thermometer DS18B20 Temperature Sensor

　　The DS18B20 temperature sensor provides a 9-bit (binary) temperature reading indicating that the temperature information of the device is sent to or from the DS18B20 temperature sensor through a single-wire interface. Therefore, only one line (and ground line) is required from the host CPU to the DS18B20 temperature sensor. DS18B20 temperature sensor The power can be provided by the data line itself without the need for an external power supply. Because each DS18B20 temperature sensor has been given a unique serial number when it leaves the factory, any number of DS18B20 temperature sensors can be stored on the same single-wire bus. This allows for many different The temperature sensitive device DS18B20 is placed in the place. The measurement range of the DS18B20 temperature sensor is from -55 to +125. The increment value is 0.5 and the temperature can be converted into a number within s (typical value).

　　Each DS18B20 temperature sensor includes a unique 64-bit long serial number. The serial number value is stored in the ROM (read-only memory) inside the DS18B20 temperature sensor. The first 8 bits are the product type code (DS18B20 codes are all 10H), followed by 48 The last 8 bits are the unique serial number of each device. The last 8 bits are the previous 56-bit CRC (cyclic redundancy check) code. The temperature sensor in DS18B20 also has two 8-bit memories used to store the measured temperature value. The RAM number is 0. No. 1 and No. 1. Memory No. 1 stores the sign of the temperature value. If the temperature is negative (), the 8 bits of memory No. 1 are all 1. Otherwise, they are all 0. Memory No. 1 is used to store the complement LSB (lowest bit) of the temperature value. ) 1 represents 0.5. Compute the binary number in the memory and convert it into a decimal number and divide by 2 to get the measured temperature value (-550125). The pins of the DS18B20 temperature sensor are shown in Figure 226l. Each D51820 temperature sensor It can be set to two power supply modes, namely data bus power supply mode and external power supply mode. The data bus power supply mode can save one wire, but it takes a long time to complete the temperature measurement. The external power supply mode uses one more wire, but the measurement speed is faster.

　　The company also provides ultra-high precision DS18H20+

　　Overview:

　　DS18H20 is an ultra-high-precision single-bus temperature measurement chip. The temperature measurement range of the sensor is -55℃ to +125℃; the maximum error in the range of 0℃ to +50℃ is ±0.15℃, and the maximum error in the full temperature range is ±2℃. Users can flexibly choose power supply mode and parasitic power supply mode.

　　Features:

　　●Temperature accuracy: ±0.15°C (0°C-50°C) Accurate original factory calibration, easy to use, no customer calibration required

　　●Excellent long-term stability and reliability

　　●High-precision calibration of customized temperature ranges can be provided according to customer needs

　　●Single bus interface, saving wiring resources

　　●A/D 9-12 bit programmable

　　●Wide supply voltage range 2.7V-5.5V Each chip has programmable ID serial number

　　●Super ESD protection capability (HBM>8000V)

　　●Simple application, no additional components required

　　typical application:

　　●Instruments

　　●Water temperature and other environmental monitoring

　　●Industrial process control

　　●Medical equipment