4-20mA pollution index meter

Automatic SDI analyzer/4-20mA pollution index meter/SDI analyzer/SDI instrument model:H18403

4-20mA pollution index metergeneral want

What is SDI

The silt density index (SDI) value iswater quality indicatorsOne of the important parameters. It represents particles, colloids, and other substances in water that can block various types of blockagesWater purification equipmentThe content of the object.

2. The necessity of measuring SDI

inReverse osmosis water treatmentDuring the process, SDI value is measuredreverse osmosis systemOne of the important signs of water ingress; It is to verify whether the effluent from the pre-treatment system has reached the required levelreverse osmosisThe main means of water inlet requirements. Its size is crucial for the operational lifespan of reverse osmosis systems.

The lower the SDI value, the smaller the tendency for water to contaminate and block the reverse osmosis membrane, and the longer the membrane's cleaning and usage cycle. Considering both economy and efficiency, mostreverse osmosisThe manufacturer recommends that the SDI value of reverse osmosis inlet water should not exceed 5.

3. SDI measurement method

The measurement of SDI value data is based on ASTM (American Standard for Testing Material) 4189-95 standard, which refers to the blockage rate of a certain volume of test water sample (usually 150ml, 500ml) passing through a microporous filtration membrane with a pore size of 0.45um and a diameter of Φ 47mm at a certain pressure (30psi, equivalent to 2.1kg/cm) and standard time interval (usually 5min, 10min, 15min).

The calculation formula for SDI value is as follows:

T0: The time required to filter a certain volume of water sample at the beginning of the test

Ø Tn: The time required to filter and obtain the same volume of water sample n minutes after the start of the test

Generally, the value of n is 15 minutes. When the amount of pollutants in the water is high, the filtered water volume can be taken as 150ml, 300ml, etc., and the interval time can be changed to 10 minutes, 5 minutes, etc. The value of 15 in the calculation formula is also adjusted accordingly to 10 and 5.

During each test, the pressure and temperature should remain stable, with pressure fluctuations not exceeding ± 5% and water temperature fluctuations not exceeding ± 1 ℃. Otherwise, the data obtained from the test will be invalidated and need to be re measured;

1、 Equipment parameters

1. Electrical specifications: The specific electrical specifications are as follows

Power input: The device input power is 220V/AC, 50 or 60Hz.

Power: ＜ 30W

Signal output: 4-20mA

When the device is stopped or the connection is changed, the power supply should always disconnect from SDI. SDI has a fuse installed in the fuse holder on the device side panel plug-in interface, which contains internal circuits. The fuse specification is 5 × 20-2A.

2. Dimensions: 320 × 300 × 85mm (W × H × D)

3. Measurement range (SDI 15): 0.2~6.67

4. Pre membrane pressure: 0.21Mpa

5. Filter membrane specification: Φ 25mm, pore size 0.45um

6. Water sample volume: 150ml

7. Operating temperature: 0 ℃ to 55 ℃

8. Environmental humidity: 30% -95% relative humidity (without condensation)

9. Pipeline connection: The specifications for pipeline connection are as follows

There is one water inlet, one drainage outlet, and one exhaust outlet, all of which are quick plugs with a diameter of 8mm.

Ø Description: When the device is initially started, the internal fluid will flow towards the drain at a speed of 150mL/min under pressure. Therefore, all drainage and exhaust pipes must be routed to an open drainage outlet.

2.Mouse Stimulator/Mouse Stimulator/Rat Stimulator/Electric Shock Cage Model:H18402

The rat and mouse stimulator is one of the instruments used for learning, memory, and drug research. After experiments and various improvements, most educational institutions in China have now adopted this instrument for scientific experiments

2、 Experimental principle:

The mouse box is a rectangular box (50cm × 23cm × 30cm), divided into a safety zone and an electric shock zone by a partition with a door (7cm × 5cm). The bottom of the electric shock zone is a copper fence that can be electrified (spaced 0.5 cm apart), and there is a sound source at the top The experiment is divided into two parts: training and formal testing Select rats with consistent responses to electric shocks for training. Place the rats in a shuttle box to adapt to the environment for 1 minute, then place them in the electric shock area and use sound as a conditional stimulus. After 10 seconds of sound, use electric shock (40 V) as an unconditional stimulus to make the rats escape to the safe area The training period is 4 days, 10 times a day, with an interval of 2-3 minutes between each test. The formal test is conducted at 5 days, and 10 reactions are observed. The active avoidance reaction is positive when entering the darkroom within 10 seconds of the sound, and the time from the sound to the rat entering the darkroom (active avoidance) is recorded. If the rat does not actively avoid within 10 seconds, entering the darkroom after receiving an electric shock is passive avoidance, and the number of times it is actively avoided is recorded

3、 Technical indicators:

1. Instrument box size: 50cm × 23cm × 30cm

2. Stimulus appliance size: 22cm × 18cm × 11cm

3. Power supply: 220V 50Hz

4. Stimulus methods: sound, electric stimulation

5. Timing: seconds

3.Fruit Hardness Tester/Fruit Maturity Testing/Fruit Hardness Tester/Fruit Softness ConditionH18401

* DPSeries is a tool for growers.
* By measuring the force of a specific size punch pushing into the flesh,Determine the ripeness of fruits,Assist in determining picking time or monitoring softening during fruit storage.
* **Value locking function.
* Undervoltage alarm indication function.

4.Dissolution tester model:H18399

Performance characteristics:

Automatic fixed height clutch (various methods interchangeable).

Adjust the cup holder.

Electric lifting of the machine head.

DC brushless water pump with low noise and long service life.

PTC heater, water flow sensor, temperature switch, triple protection.

Imported 1/3B grade high-precision Pt1000 temperature sensor from Germany, with fast response speed and high accuracy.

Equipped with a solvent temperature monitoring system, it can monitor the temperature of 8 cups of solvent.

Equipped with an electric, independent multi-channel, and automatic dosing system, it can achieve synchronous dosing and sequential dosing modes. During sequential dosing, the mixing can be paused or not.

Mixing speed monitoring, which can achieve real-time monitoring of mixing speed.

The multiple dosing method of flipping down the tablet can avoid the loss of small tablets and the requirement for particle dosing.

² White light, red light, three level PWM dimming system, illumination without color deviation, meeting the lighting requirements of light avoiding samples.

Redundant wiring design ensures that the connectors are firm and reliable.

CANBus communication bus, safe and reliable.

The electric automatic single column sampling rack lifting system covers all testing methods and allows for real-time monitoring of solvent temperature.

Permission management system.

Audit tracking function.

Equipped with a micro printer for on-site printing.

Bamboo style lifting column with double cone positioning, low noise and accurate positioning.

Equipped with a capacitive fingerprint recognition system, it has fast recognition speed and high accuracy.

Can be configured with LAN, WiFi, Bluetooth, RS232, RS485 and other interfaces.

Can be configured to run online with the sampler.

Technical Specifications:

Number of devices: 8 cups.

Applicable methods: basket method, paddle method, small cup method, disc method (large and small discs), drum method (long and short drum).

Mixing system:

Region: Single zone, single control.

Range: 25RPM-250RPM.

Direction: clockwise, counterclockwise.

Resolution: 0.1RPM.

Accuracy: ± 4%.

Speed detection: single channel.

Swing amount: ≤ 1mm.

Loop system:

Region: Single zone, single control

Range: Room temperature -45 ℃.

Resolution: 0.01 ℃.

Accuracy: 37 ℃± 0.3 ℃.

Solvent temperature detection: 6 cups.

Medication system:

Dosing power: electric, automatic; Independent 8 channels.

Medication administration method: flip down the board.

Medication mode: synchronous administration, sequential administration.

Sequential dosing mixing pause function: optional.

Multiple administration of granules: support.

Lighting system: white light, red light, three-level PWM dimming lighting.

Sampling system:

Range: 100ml-1000ml.

Resolution: 1ml.

Accuracy: ± 1mm.

L lifting system: bamboo style single column lifting+double cone positioning.

Permission management: three levels, seven users.

Audit tracking: 128 records x 366 days.

Login method: username+password, fingerprint.

Online printing: supported.

Dissolution sampler DP-QY8 (optional)

The DP-QY8 sampler is equipped with 8 pipeline interfaces, fully compatible with most dissolution instruments from manufacturers. Upgradeable WiFi, RS232, RS485, LAN, Bluetooth data interfaces. The entire series uses a 26ml high-precision syringe as the sampling power. Fast sampling speed and high accuracy. The entire system has the functions of initial filtrate and distribution, and can realize the disposal of initial filtrate and the distribution and retention of subsequent filtrate. And the samples can be collected directly into ampoules. Using 8-channel precision injection pumps to achieve high-precision automatic filtration, sampling, and fluid replenishment, with accurate control and high degree of intelligence.

Performance characteristics:

Fully corrosion-resistant and high-pressure resistant pipelines.

The syringe pump adopts a grinding grade ball screw and a three-phase stepper motor.

Permission management, supporting 3 levels and 7 users.

Audit tracking function.

Supports fingerprint login.

Supports online printing.

The test tube is equipped with a silicone cap.

² Can achieve synchronous filtering.

Can be collected in ampoules.

Compatible with dissolution testers from most manufacturers.

² Can provide 3Q verification.

Full 24V DC power supply system.

Technical Specifications:

Syringe specification: 26ml, 1% accuracy.

Sampling accuracy: RSD ± 1% @ 10ml.

Sampling channel: 8.

Sampling interval: minimum of 1 minute.

Sampling frequency: 16 times.

Single sampling volume: 1ml~100ml.

Tube collection volume: 15ml.

Allocation function: Yes.

Fluid replacement function: equal volume fluid replacement.

Sampling mode: accuracy, speed.

Initial filtration volume: 0ml~10ml.

Initial filtration: 10 μ m cylindrical filter head.

L filtration: A 25mm injection filter with optional pore size material.

Permission management: three levels, seven users.

Audit tracking: 128 records x 366 days.

Login method: username+password, fingerprint.

Online printing: supported.

5.Effective chlorine detector/effective chlorine tester/iodometric method effective rateH18398

H18398Product Introduction of Effective Chlorine Detector
1. Built in testing items, combined with standardized finished reagents for quantitative and clean packaging, and process oriented testing;
2. No need for complicated reagent configuration process, just take a sample to zero, add the corresponding reagent, and press the test button for the three-step operation steps;
3. The preset parameter program module and rigorous built-in standard calculation formula shorten the entire data conversion process to 1 second;
4. Automated analysis technology based on national standard methods, with strict built-in standard curves, effectively improves the measurement results
Accuracy and standardization;
5. The use of solid-state emitters as both light sources and monochromators results in a simpler optical system structure compared to traditional spectroscopic systems,
The instrument has seismic and moisture resistance properties;
6. The reagents are packaged independently and have a long shelf life;;
7. The light source/monochromator, colorimetric tank, and sensor are integrated without moving parts, and pulse power supply is used. The service life of the light source can reach 100000 hours, greatly improving the accuracy, sensitivity, and reliability of the instrument;
8. LED screen illumination display significantly reduces power consumption, even in low light conditions, without affecting observation;
9. Equipped with the ability to create new standard curves and calibrate built-in standard curves, the instrument can automatically fit curves and calculate results.

H18398Technical parameters of effective chlorine detector
Test Item available chlorine
detection method GB/T 5750.11-2006 Improved Method - Iodometric Method
measurement range Low range 5～500mg/L ； High range 0.05%~15.0% (or 500-150000mg/L)
resolution 0.01mg/L
Detection Time ＜1min
accuracy Low range 200mg/L effective chlorine ≤ 10mg/L; High range 5% effective chlorine ≤ 0.2%
Operation Mode Directly display the results without the need for calculation
light source LED cold light source, longer service life of the light source
power supply Powered by USB or 4 AA alkaline batteries

The above parameter information corresponds to the image