SKU_BOS0042_Waterproof_Temperature_Sensor

Introduction

This waterproof DS18B20 temperature sensor is extremely suitable for when you need to measure something far away, or in wet conditions, for instance, cold storage temperature monitoring, electronic device temperature detection, soil temperature measurement, and so on.

Specification

Operating Voltage: 3V-5V
Connector: PH2.0-3P
Product Dimension: 26×22mm/1.02×0.87"
Signal Type: analog signal

Pinout

Label	Name	Description
1	GND	Negative
2	VCC	Positive
3	SIGNAL	Analog Signal Line

Usage Description

The temperature sensor is compatible with Arduino. It must be used with a pull-up resistor and a sensor converter. Connect all parts together, power up and place the sensor probe into the object to be measured, the readings of the sensor will be displayed on the OLED module. This temperature sensor can be used in the temperature range -55℃~+125℃ to provide -10°C to +85°C temperature detection with an accuracy of ±0.5°C.

Note: although the product can work normally under 125°C, please do not store sensor cable in the condition with temperature exceeding 100°C since it is made from PVC and is not as heatproof as the sensor.

Principle

The thermistor in the sensor probe is sealed by the electrically conductive sealant to ensure the high sensitivity and accuracy of the sensor. Each pin of the chip is separated by the heat shrink tube to prevent the short-circuit. The shell of the probe is made of stainless steel, which makes the sensor waterproof, moistureproof, and rustproof.

Application

(1) The effects of temperature on seed germination

Description: sow seeds of the same kind and quantity into two planter boxes, monitor the temperature of the two boxes and record the seed germination rate under different temperatures.

Components:


BOS0042 Waterproof Temperature Sensor	BOS0035 Mainboard-3IO	BOS0044 OLED Display Module

MBT0039 micro:bit	BOS0040 micro:bit BOSON Expansion Board

Tips: micro:bit and micro:bit BOSON expansion boards are used in the programming example.

Non-programming Sample

Connection:

Press the black button on the OLED display module to select the soil moisture sensor mode.

Programming Sample

Connection:

Flowchart:

Mind+ Sample Program:

Makecode Sample Program:

Video Demo:

Non-programming	Programming

(2) Grain Bin Temperature Monitoring

Description: temperature and humidity are very essential for grain storage and these two factors are closely linked together. Normally, the grain moisture content should be no more than 12% so that the temperature can be maintained in a stable range. When the moisture content is over 20%, the seed begins to germinate and breathe, as a result, the temperature will rise accordingly, and when it is over 22°C, storage problems may occur. Hence, it is necessary to set a humidity and temperature system for the grain bin. When the temperature exceeds 22°C, the fan starts to rotate, the LED module lights up, and buzzer buzzes to alarm people. When the moisture content is more than 20%, the LED lights up and the buzzer makes sounds.

Components:


BOS0042 Waterproof temperature sensor	BOS0041 Air humidity sensor	BOS0020 Buzzer module

BOS0021 Fan module	BOS0017 LED module	BOS0040 micro:bit Expansion board

MBT0039 micro:bit

Tips: micro:bit and micro:bit BOSON expansion boards are used in the programming example.

Programming Sample

Connection:

Flowchart:

Mind+ Sample Program:

Makecode Sample Program:

Video Demo:

Programming

(3) Refrigerator Temperature Indicator

Description: The ideal refrigerator tempereature is 2-8℃(35.6-46.4°F), which can prevent fresh food from spoiling too quickly and slow the growth of bacteria that can cause foodborne illnesses. Here we are going to make a refrigerator temperature indicator. When the temperature in the refrigerator is too high, the red LED lights up; if it's too low, the blue LED turns on. When the temperature is between 2-8℃, the two LEDs turn off.

Components: