SEN0249

SEN0249 Datasheet

Gravity Analog Spear Tip pH Sensor / Meter Kit For Soil And Food Applications SKU SEN0249

Part	Datasheet
SEN0249	SEN0249 (pdf)

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Gravity Analog Spear Tip pH Sensor / Meter Kit For Soil And Food Applications SKU SEN0249 Introduction Gravity Analog Spear Tip pH Sensor / Meter Kit for Soil and Food Applications SKU SEN0249 The pH value of the soil is an important factor affecting the growth of plants. Suitable pH value for different plants differ from each other. The pH value of foods, such as fruit, meat and vegetable are also an important indicator of their quality. For example, by measuring the pH value of meat, we can determine whether the meat we bought is fresh or not. The pH probe of this kit is attached with a spear like protection shield made of stainless steel with a sharp tip. It can be directly stabbed into the soft semisolid material to measure the pH value, such as wet soil or foods. But this can not be done with common pH probe, or it will be damaged. This kit is Arduino compatible and easy to use. It helps you to quickly build a pH meter to measure the pH value of soil or foods directly. • It is forbidden to measure hard solid samples and semisolid samples containing sharp particles. • Please keep the plug of the probe, signal transmitter board especially the BNC connector clean and dry. • This pH probe is a laboratory electrode, which is not suitable for prolonged online testing. Therefore, do not immerse the electrode in the measured object for a long time. • After using the pH probe, please clean it carefully. • The components of this probe which touch the measured objects have a black ABS shell, a glass component and a silicone rubber material. Before testing the object, it is necessary to confirm that the measured objects are not harmful to these materials. • Not suitable for measurement oily samples, samples with higher viscosity, samples with more fine particles. • Not suitable for non-aqueous titration. • The head of the stainless steel spear tip is sharp. Please pay attention to safety when using it. Specification Spear Tip pH Probe • Measuring Range 0~10pH • Accuracy ± 0.1pH • Operating Temperature 5~60 ℃ • Response Time standard buffer solution • Salt Bridge Material Poly Tetra Fluoro Ethylene PTFE • Shell Material Polyoxymethylene POM • Filling Solution Can NOT be Filled • Wiring Connector BNC • Wire Length 850mm BNC connector included Signal Transmitter Board • Input Power + 5.00V • Ouput Signal 0 ~ 4.0V • Accuracy < ±0.2pH 25 ℃ • Probe Connector BNC • Module Connector Gravity:PH2.0-3Pin • Dimension 43mmx32mm 1.69inch*1.26inch Board Overview No. 1 2 3 4 Name A + - Description Analog signal output 0~4.0V Positive power supply 5.0V Negative power supply GND pH probe connector Signal Transmitter Board Pin Definition pH Probe Characteristics The relation between the output voltage and the pH value is shown as followed 25 ℃ : Tutorial Voltage mV pH Value Voltage mV pH Value This tutorial will demonstrate how to use this spear tip pH probe to measure the pH value of semisolid material,such as soil and food. Requirements • Hardware DFRduino UNO or similar x 1 Spear tip pH probe x 1 Signal Transmitter Board x 1 Stainless Steel Spear Tip Shield x 1 Gravity Analog Cable 3pin or Dupont Wires x 1 pH standard buffer solution x 1 pH standard buffer solution x 1 • Software Arduino IDE V1.0.x, V1.6.x or V1.8.x , Click to Download Arduino IDE from Spear Tip Shield Installation Before measuring the semisolid material, the attached stainless steel spear tip shield should be installed first to protect the glass probe. If you want to immerse the pH probe into the buffer solution to calibrate it, you could install the spear tip shield after finishing calibration. First, unscrew the protective solution bottle and pull out the top cap with rubber pad from the probe. Then, unscrew the fixed ring and carefully insert the spear tip shield to the probe. Finally, screw the fixed ring back to the probe to hold the shield. The following diagram below shows how to install the spear tip shield to the probe step by step. Connection Diagram Calibration If this product is used for the first time, or if it has been used for a while, calibration is needed to reduce the error. During calibration, if bubbles in the glass bulb of the electrode head were found, you could slightly thrown off the probe several times to make the bubbles disappear. Cautions: • Please use an external power supply for more accuracy voltage. Closer +5.00V power supply can result in higher pH accuracy. • It is recommended to calibrate the probe with the standard solution before each use, in order to obtain more accurate results. The best calibration temperature is about 25 • It is necessary to use pure water to clean the probe before measuring another solution, to prevent solution contamination. Cleaning with distilled water is recommended. • After 2 hours of continuous use, the probe should be calibrated again to ensure the accuracy. • Please keep the signal transmitter board clean and dry to avoid affecting the input resistance of the BNC connector. • Put the pH probe into the standard buffer solution and wait for one minute. Open the serial monitor of the Arduino IDE, the pH value will be printed on it, and the error should less than Record the printed value and compared it with The difference should be inputted into the "Offset" in the sample code. For example, the printed value is so the difference is The "# define Offset should be changed to "# define Offset in your code. Then upload the new code. • Clean the pH probe with pure water. Distilled Water is recommended. Then absorb the residual water trace with filter paper. Put the pH probe into the pH standard solution. Wait for at least one minute. Then open the serial monitor of the Arduino IDE and adjust the potentiometer on the transmitter board to tune the gain until the printed value is stable at around • Clean the pH probe with pure water. Distilled Water is recommended. Then absorb the residual water trace with filter paper. After the above steps have been completed, the calibration is complete. Then the pH electrode can be used for the actual measurement.

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Gravity Analog Spear Tip pH Sensor / Meter Kit For Soil And Food Applications SKU SEN0249

Introduction

Gravity Analog Spear Tip pH Sensor / Meter Kit for Soil and Food Applications SKU SEN0249 The pH value of the soil is an important factor affecting the growth of plants. Suitable pH value for different plants differ from each other. The pH value of foods, such as fruit, meat and vegetable are also an important indicator of their quality. For example, by measuring the pH value of meat, we can determine whether the meat we bought is fresh or not. The pH probe of this kit is attached with a spear like protection shield made of stainless steel with a sharp tip. It can be directly stabbed into the soft semisolid material to measure the pH value, such as wet soil or foods. But this can not be done with common pH probe, or it will be damaged. This kit is Arduino compatible and easy to use. It helps you to quickly build a pH meter to measure the pH value of soil or foods directly.
• It is forbidden to measure hard solid samples and semisolid samples containing sharp particles.
• Please keep the plug of the probe, signal transmitter board especially the BNC connector clean and dry.
• This pH probe is a laboratory electrode, which is not suitable for prolonged online testing. Therefore, do not immerse the electrode in the measured object for a long time.
• After using the pH probe, please clean it carefully.
• The components of this probe which touch the measured objects have a black ABS shell, a
glass component and a silicone rubber material. Before testing the object, it is necessary to confirm that the measured objects are not harmful to these materials.
• Not suitable for measurement oily samples, samples with higher viscosity, samples with more fine particles.
• Not suitable for non-aqueous titration.
• The head of the stainless steel spear tip is sharp. Please pay attention to safety when using it.

Specification

Spear Tip pH Probe
• Measuring Range 0~10pH
• Accuracy ± 0.1pH
• Operating Temperature 5~60 ℃
• Response Time standard buffer solution
• Salt Bridge Material Poly Tetra Fluoro Ethylene PTFE
• Shell Material Polyoxymethylene POM
• Filling Solution Can NOT be Filled
• Wiring Connector BNC
• Wire Length 850mm BNC connector included

Signal Transmitter Board
• Input Power + 5.00V
• Ouput Signal 0 ~ 4.0V
• Accuracy < ±0.2pH 25 ℃
• Probe Connector BNC
• Module Connector Gravity:PH2.0-3Pin
• Dimension 43mmx32mm 1.69inch*1.26inch

Board Overview

No. 1 2 3 4

Name A + -

Description Analog signal output 0~4.0V Positive power supply 5.0V Negative power supply GND
pH probe connector

Signal Transmitter Board Pin Definition
pH Probe Characteristics

The relation between the output voltage and the pH value is shown as followed 25 ℃ :

Tutorial

Voltage mV pH Value Voltage mV pH Value

This tutorial will demonstrate how to use this spear tip pH probe to measure the pH value of semisolid material,such as soil and food.

Requirements
• Hardware DFRduino UNO or similar x 1 Spear tip pH probe x 1 Signal Transmitter Board x 1 Stainless Steel Spear Tip Shield x 1 Gravity Analog Cable 3pin or Dupont Wires x 1 pH standard buffer solution x 1 pH standard buffer solution x 1
• Software Arduino IDE V1.0.x, V1.6.x or V1.8.x , Click to Download Arduino IDE from

Spear Tip Shield Installation

Before measuring the semisolid material, the attached stainless steel spear tip shield should be installed first to protect the glass probe. If you want to immerse the pH probe into the buffer solution to calibrate it, you could install the spear tip shield after finishing calibration. First, unscrew the protective solution bottle and pull out the top cap with rubber pad from the probe. Then, unscrew the fixed ring and carefully insert the spear tip shield to the probe. Finally, screw the fixed ring back to the probe to hold the shield. The following diagram below shows how to install the spear tip shield to the probe step by step.

Connection Diagram

Calibration

If this product is used for the first time, or if it has been used for a while, calibration is needed to reduce the error. During calibration, if bubbles in the glass bulb of the electrode head were found, you could slightly thrown off the probe several times to make the bubbles disappear.

Cautions:
• Please use an external power supply for more accuracy voltage. Closer +5.00V power supply can result in higher pH accuracy.
• It is recommended to calibrate the probe with the standard solution before each use, in order to obtain more accurate results. The best calibration temperature is about 25
• It is necessary to use pure water to clean the probe before measuring another solution, to prevent solution contamination. Cleaning with distilled water is recommended.
• After 2 hours of continuous use, the probe should be calibrated again to ensure the accuracy.
• Please keep the signal transmitter board clean and dry to avoid affecting the input resistance of the BNC connector.
• Put the pH probe into the standard buffer solution and wait for one minute. Open the serial monitor of the Arduino IDE, the pH value will be printed on it, and the error should less than Record the printed value and compared it with The difference should be inputted into the "Offset" in the sample code. For example, the printed value is so the difference is The "# define Offset should be changed to "# define Offset in your code. Then upload the new code.
• Clean the pH probe with pure water. Distilled Water is recommended. Then absorb the residual water trace with filter paper. Put the pH probe into the pH standard solution. Wait for at least one minute. Then open the serial monitor of the Arduino IDE and adjust the potentiometer on the transmitter board to tune the gain until the printed value is stable at around
• Clean the pH probe with pure water. Distilled Water is recommended. Then absorb the residual water trace with filter paper. After the above steps have been completed, the calibration is complete. Then the pH electrode can be used for the actual measurement.

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Datasheet ID: SEN0249 509135