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22

Mar

2017

The working principle of digital tachometer

The digital tachometer will read the received digital pulse signal (sent by the sensor) directly into the counting port of the cpu after processing, calculate the speed and the pos
15

Mar

2017

Application of digital tachometer

Digital tachometer, also called digital tachometer, is used to measure the rotation speed of objects. According to the measurement method, it can be divided into contact type and n
06

Mar

2017

laboratory and industrial pH electrodes

In terms of use, laboratory pH electrodes are used for short-term intermittent testing under better environmental conditions, while industrial pH electrodes are used for long-term
28

Feb

2017

Application of industrial pH meter

The use of a pH meter can better control the chemical reaction and achieve the purpose of improving productivity and product quality as well as safe production. The pH measurement
22

Feb

2017

How to detect the quality of the pH electrode

Record 186mV of the test data in step (1), clean the electrode and insert it into pH9.18 buffer solution, and read after stabilization, E2'=111mV (absolute value), ΔE'=E1'+E2'=186+
15

Feb

2017

How to clean the pH electrode

After the bulb and liquid junction are contaminated, clean them with the following solvents, and then use deionized water to remove the solvents, and then immerse the electrodes in
06

Feb

2017

what is purpose of pH buffer solution

⑴ Calibrate and calibrate the pH meter before pH measurement. (2) To verify the accuracy of the pH meter, for example, after calibrating the pH meter with pH 6.86 and pH 4.00, i
31

Jan

2017

How to store & use pH buffer solution correctly

pH12.46, etc., should be packed in a polyethylene bottle) with a tight cap. It should be stored at a low temperature (5-10°C) in the refrigerator. Generally, it can be used for abo
28

Jan

2017

How to prepare pH buffer solution

For general pH measurement, a set of pH buffer reagents (250ml can be prepared) can be used. When preparing the solution, deionized water should be used and pre-boiled for 15-30 mi
20

Jan

2017

what is pH scale

pH measurement is a relative measurement. It only indicates the difference in pH between a standard solution and an unknown solution. In actual measurement, a standard buffer solut
12

Jan

2017

What is the pH Value of water

The pH value is one of the most important physical and chemical parameters of aqueous solutions. All natural phenomena involving aqueous solutions, chemical changes, and production
05

Jan

2017

What is pH meter?

A pH meter refers to an instrument used to determine the pH value of a solution. The pH meter works on the principle of a galvanic battery. The electromotive force between the two
28

Sep

2018

What does LEL in a combustible gas detector

When the concentration of combustible gas in the air reaches its lower explosion limit, we call the explosion risk of the combustible gas environment in this place as 100%, that is
11

Sep

2018

precautions for using combustible gas detector

(1) First of all, it is necessary to find out what the leakage points of the device are, analyze their leakage direction, pressure and other factors, and draw the distribution diag
15

Aug

2018

difference of combustible and toxic gas alarm

1. The core component gas sensor is different (main difference): the combustible gas alarm uses a catalytic combustion gas sensor; the toxic gas alarm uses an electrochemical toxic
31

Dec

2016

Maintenance of combustible gas detector

For combustible gas detectors to detect combustible gas information, the detector must communicate with the detection environment. Therefore, it is inevitable that various pollutin
25

Dec

2016

Set alarm range of combustible gas detector

The alarm value of the combustible gas alarm system is set as follows: The default low limit is 25% LEL (adjustable from 5% LEL to 40% LEL); the default high limit is 50% LEL (adju
05

Nov

2016

The difference combustible and toxic gas alarm

combustible gas alarm is about 7.5m; the detection radius of the toxic gas alarm is about 1.5m. In addition, because the gas sensors used for combustible gas and toxic gas are d
10

Dec

2016

The alarm value of combustible gas detector

The alarm value of the combustible gas alarm system is set as follows: The default low limit is 25% LEL (adjustable from 5% LEL to 40% LEL); the default high limit is 50% LEL (adju
25

Nov

2016

The setting range of the alarm value of the combustible gas detector

The combustible gas detector is a detector that responds to single or multiple combustible gas concentrations. There are two types of combustible gas detectors: catalytic type and

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