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    3 in 1 Pen Type pH Meter, pH/TDS/Temp

    3 in 1 Pen Type pH Meter, pH/TDS/Temp

    T-PHM-EZ9901
    3 in 1 pen type pH meter measures TDS within a range of 1-19999ppm, pH from 0.00 to 14.00, and temperature between 0-60°C (32-140°F). pH tester offers a resolving power of 1ppm for TDS and 0.01pH for pH. The accuracy is ±2% for TDS, ±0.05pH for pH, and ±0.5°C for temperature. It features temperature compensation within 0-60°C and operates in environments with temperatures from 0-60°C and 100% relative humidity. The device is powered by three 1.5V batteries.
    $38.92
    Handheld pH Meter for Industrial Water Testing

    Handheld pH Meter for Industrial Water Testing

    T-PHM-AS218
    Handheld ph meter offers a wide measurement range from 0.00 to 14.00 pH with a basic measurement error of ±0.05 and stability of ±0.03. pH detector also has an mV measurement range of -1400 mV to +1400 mV. The portable pH meter includes solution temperature compensation between 0°C and 60°C, supports measured liquid temperatures of 5°C to 60°C, and operates in an environment from -10°C to 60°C. With repeatability of 0.03, it can record maximum and minimum values. Additional features include a backlight display, data hold function, low voltage reminder, and the ability to function in an environment with temperatures up to 35°C and humidity up to 80%.
    $182.53
    Soil pH Monitor, Soil Moisture/Temperature/pH

    Soil pH Monitor, Soil Moisture/Temperature/pH

    T-PHM-SGS07
    Soil pH monitor operates within a temperature range of 0°C to 60°C (32°F to 140°F) and measures soil moisture from 0% to 90%, with a pH range of 3 to 9. Powered by 3 AAA alkaline batteries, it provides a battery life of approximately 3 months. The pH meter includes a test range for soil NPK (Nitrogen, Phosphorus, and Potassium) from 0 to 1999 mg/kg. Highly functional for agricultural or gardening applications.
    $62.89
    Pool pH Tester for Cl & pH

    Pool pH Tester for Cl & pH

    T-PHM-MDYLF01
    Swimming pool ph tester offers a pH measurement range of 5.5 to 9.0 and a chlorine (Cl) measurement range of 0.2 to 3.0 ppm. with a measurement accuracy of 0.1 and a resolution of 0.1. The ph cl tester is powered by a 1.5V supply and is made from durable ABS material. Suitable for swimming pools, waterworks residual chlorine testing.
    $64.86
    pH Tester for Aquarium, Online Wall-mounted

    pH Tester for Aquarium, Online Wall-mounted

    T-PHM-295
    The pH tester for aquariums, an online wall-mounted model, offers a pH measurement range from 0.00 to 14.00 with an accuracy of ±0.1 and a resolution of 0.01. pH detector measures temperature from -5.0°C to 60.0°C, with a temperature accuracy of ±0.5°C and a resolution of 0.1°C/F, and features built-in temperature compensation. A screen size of 44×26mm with backlight support.
    $110.88
    pH Meter Electrode for Strong Acid or Alkali

    pH Meter Electrode for Strong Acid or Alkali

    T-PHME
    The pH meter electrode for pure water can be used in strong acid or alkali. With a measuring range from 0 to 14 pH and an accuracy of ±0.02 pH. The electrode operates effectively within a temperature range of 0 to 100°C, equipped with an internal temperature compensation sensor (NTC 10K). The electrode’s zero position is calibrated at 7±0.3 pH and compressive strength can withstand up to 0.6 MPa, and the slope is greater than 98%.
    $185.99
    pH Meter Electrode for Chemical

    pH Meter Electrode for Chemical

    T-PHMEC
    The pH meter electrode for chemical with highly accurate pH measurements in a range of chemical environments. Measuring range of 0 to 14 pH and an accuracy of ±0.02 pH, this PTFE electrode is ideal for demanding industrial and laboratory settings. Temperature range of 0-60°C (32-140°F) and includes internal temperature compensation (NTC 10K) to ensure precision, even under varying thermal conditions.
    $179.99
    Flat pH Meter Electrode

    Flat pH Meter Electrode

    T-FPHE
    The flat pH meter electrode has a measuring range of 0-14 pH with an accuracy of 0.02 pH. pH meter electrode operates within a temperature range of 0-60°C (32-140°F) and includes internal temperature compensation using an NTC 10K sensor. The zero position is 7 ± 0.3 pH, with a slope of ≥96% and a compressive strength of 0.6 MPa. The electrode shell is made from durable PPS/PC material, with installation size of 3/4 NPT on both ends, and it connects via a direct lead. Cable lengths are available in 5m, 10m, 15m, or custom lengths up to 50m, while the electrode has a service life of approximately 6 months. The high-quality low-noise cable enables signal transmission up to 60m.
    $101.99
    pH Meter Electrode for Food

    pH Meter Electrode for Food

    T-PHMEF
    pH meter electrode for food measurements with a broad range of 0-14 pH and an impressive accuracy of ±0.02 pH. Glass electrode operates in a temperature range of 0-100°C (32-212°F). A sensitive glass bulb with a surface area of 217.6 square millimeters, enhanced by five layers of glass film, An external reference electrode with added Ag+ prevents salt bridge blockages.
    $205.99
    Combination pH Electrode for Water

    Combination pH Electrode for Water

    T-CPHE
    Combination pH electrode With a measurement range of 2-12pH and built-in temperature compensation using a Pt1000 sensor, operates within a temperature range of 0-60°C (32-140°F). Made with durable PC material, it has 3/4"NPT threading and a standard 5-meter direct lead cable for ease of use and installation. built with advanced anti-pollution and anti-interference technology. Negative pressure resistance, a built-in temperature probe for enhanced accuracy, and a fast, stable response to pH changes. Suitable for water treatment, aquaculture, sewage disposal, chemical processing.
    $171.98
    High Temperature pH Electrode for Pharmacy / Brewery / Desulphurization

    High Temperature pH Electrode for Pharmacy / Brewery / Desulphurization

    T-TPHE
    High temperature pH electrode offers a measurement range of 0-14 pH with temperature resistance from 0 to 145°C. It includes optional temperature compensation with Pt100, Pt1000, or NTC30k and operates under a pressure range of ≤0.6 MPa. The electrode is equipped with a VP or S7 connector and is available in various sizes: 12mm*120, 150, 250, or 450mm. Made from durable glass material, the electrode features a pressurizable reference liquid, ceramic diaphragm, and a silver chloride electrode, all certified by FDA for sanitation purposes. Provides precise pH monitoring in high-temperature environments like pharmaceutical production, brewing, and desulphurization.
    $469.99
    High Precision Glass pH Meter Electrode

    High Precision Glass pH Meter Electrode

    T-GPHME
    High precision glass pH meter electrode can be used in laboratory. The glass electrode offers a measurement range of 2-12 with Pt1000 temperature compensation, ensuring accurate readings in a temperature range of 0-60°C. It operates under atmospheric pressure and is constructed with durable glass material. The glass electrode has a PG13.5 thread and is compatible with VP, K8S, and AK9 connection types. With a standard 5-meter cable length, making it suitable for various chemical and industrial applications.
    $199.99

    A measuring tool is a tool for measuring a certain property. Including length, temperature, time, mass, force, current, voltage, resistance, sound, radio, refractive index and average dispersion. According to its usage, it usually can be divided into two types: General measuring tools and special measuring tools.

    measuring tools 2Measuring tools can also be divided into mechanical, optical, pneumatic, electric and photoelectric types according to their working principles. However, some modern measurement tools have developed into measurement tools that use the principles of precision mechanics, light, and electricity at the same time and combined with electronic computer technology. Therefore, this classification method is only suitable for measurement tools with a single working principle.

    A measuring tool that can measure the length or angle of various types of work-pieces, This type of measuring tool has the most varieties and specifications, and is also the most widely used, including gauge blocks, angle gauge blocks, polyhedral prisms, sine gauges, calipers, micrometers, dial indicators, multi-tooth indexing tables, comparators, and laser length measuring instruments , tool microscope, coordinate measuring machine, etc. 

    Generic measuring tools
    Common measurement tools are as follows:

    Rangefinder
    Rangefinder is also called distance meter, which is an instrument used for distance measurement based on the principles of electromagnetic wave, optics, acoustics and has a compact body. Two methods are generally used to measure distance: pulse method and phase method. The process of pulse distance measurement is as follows: the laser light emitted by the range finder is reflected by the object to be measured and then received by the range finder, and the range finder also records the round-trip time of the laser. Half of the product of the speed of light and the round-trip time is the distance between the rangefinder and the measured object. The accuracy of pulse method measuring distance is generally about +/- 1 meter. In addition, the blind zone of this type of rangefinder is generally about 15 meters.

    Since the laser is used for distance measurement, and the pulsed laser beam is a monochromatic light source with very concentrated energy, so do not use your eyes to look directly at the emitting port, Do not use the aiming telescope to observe the smooth reflecting surface, so as not to hurt people's eyes. Do not directly aim the launching port of the instrument at the sun during field measurement to avoid burning the photosensitive element of the instrument.

    hand held rangefinder

    Maintenance
    Check the appearance of the instrument frequently and remove the dust, grease, mildew, etc. on the surface in time.
    Use a soft dry cloth to clean the eyepiece, objective lens or laser emission window. Scribing with hard objects is strictly prohibited to avoid damage to optical performance.
    This machine is a high-precision instrument that integrates optical, mechanical, and electrical. It should be handled with care during use, and it is strictly prohibited to squeeze or fall from a high place to avoid damage to the instrument.

    Tape measure
    The tape measure can be rolled up because there is a spring inside the tape measure. When the tape measure is pulled out to measure the length, it actually stretches the length of the ruler and the spring.Once the measurement is completed, the spring inside the tape measure will automatically shrink, and the ruler will also shrink under the action of the spring force, so the tape measure will roll up. 

    Precautions for maintenance and use

    • Keep the instrument clean before and after use.
    • Don't get severe impact or drop when using.
    • Since there is no measuring force pressure device, it needs to be used with proper and uniform measuring force.
    • Wipe and clean the surface dust after use.
    • Do not twist to prevent breakage during use.
    • When in use, it should be straightened and supported on a flat surface to prevent the measurement accuracy from being affected by the sagging of the ruler surface.

    tape measure

    Laser rangefinder 
    The laser rangefinder is an instrument that uses a certain parameter of the modulated laser to measure the distance to the target. The measuring range of laser rangefinder is 3.5~5000 meters. According to the ranging method, it is divided into phase method range finder and pulse method range finder. Pulsed laser range finder emits a beam or a sequence of short pulsed laser beams to the target when it is working. The photoelectric element receives the laser beam reflected by the target, and the timer measures the time from emission to reception of the laser beam, and calculates the distance from the observer to the target. The phase method laser rangefinder detects the distance by detecting the phase difference that occurs when the emitted light and reflected light propagate in space. The laser rangefinder is light in weight, small in size, simple to operate, fast and accurate, and its error is only one-fifth to one-hundredth of other optical rangefinders.

    laser rangefinder

    Laser rangefinder operating rules:

    • Turn on the switch, turn on the power, the "power、test indicator" is green. Touch the gear selection switch to select the appropriate gear.
    • Connect the two current output terminals of the measuring terminal of the meter to the two terminals of the conductor under test with two test wires, and the two voltage input terminals are also connected to the two terminals of the conductor under test.
    • The voltage terminal should be located inside the current terminal and as close as possible to the tested product to reduce the error introduced by the lead resistance.
    • After wiring, press the TESTE key, the "power, test indicator" is red, and the value displayed on the display is the measured resistance value.
    • When the measured conductor is open or the resistance is greater than the selected range, the first digit of the display shows "1", and the last three digits are off.

    precaution 

    • When the under-voltage symbol appears on the display, please replace the battery to ensure that you get the correct test value. Do not throw away the replaced old battery to avoid pollution.
    • The instrument should be protected from damp, rain, drop, exposure, etc.

    laser level
    The laser level is a level that guides the laser beam emitted by the laser device into the telescope tube of the level and emits it along the collimation axis. There are two types of laser level meter: a special laser level meter and a laser device attached to the level meter. It can be used with a level rod equipped with a photoelectric receiving target to perform leveling. Compared with optical level meters, laser level meters have the characteristics of high accuracy, long line of sight and automatic reading and recording. The laser level is an intelligent display device instrument. Its function is to be installed on a moving object, collect signals from the horizon, display the horizon in a larger field of view, and display the movement posture of the object in real time. If the laser level is corrected on the plane, it will be of great significance to prevent space disorientation; in addition, in medical testing, manual signals are used to adjust the position of the laser scanning line, which can perform certain pathological tests on the human brain, and it is also widely used in handicrafts and architectural decoration.

    laser level

    5 maintenance tips for laser level

    • The laser level is a precise optical instrument. Correct and reasonable use and storage have a great effect on the accuracy and life of the laser level.
    • Avoid direct sunlight and do not disassemble the laser level casually.
    • When the laser level malfunctions, it should be repaired by professionals or repair shops familiar with the structure of the laser level.
    • Each fine-tuning should be turned gently, not too much force. Lenses and optical films of the laser level are not allowed to touch with hands.
    • After each use, the laser level should be wiped clean and kept dry.

    Measuring wheel 
    Measuring wheels are also known as mechanical distance measuring vehicles, digital display measuring wheels, which are widely used in professional surveying and mapping operations, road engineering, pipeline laying engineering, wire and cable engineering and other construction operations measurement and evaluation. It can be used for the construction measurement of garden landscape and golf course, the measurement of the distance and location of traffic accidents, and the measurement of farmland construction and management. The mechanical distance measuring wheel adopts high-quality precision design, small, light and durable. The 300MM measuring wheel is easy to use, what you need to do is just to press the reset button of the counter and then the count increases when the measurement goes forward and decreases when it goes backward.

    Point-to-point measurement method

    Place the distance measuring wheel tool on the ground, so that the point pointed by the positioning pin coincides with the starting point.
    Move the distance measuring wheel until the point pointed by the positioning pin coincides with the end point.
    Record the measured reading of the dial, this reading is the correct distance.

    measuring wheel

    Tips for measuring accuracy of measuring wheels
    The distance measuring wheel has very high requirements for measurement accuracy and stability. The biggest error source of the measuring wheel is the deformation of the measuring wheel tire through online investigation. Many factors such as temperature changes, air pressure changes, and applied pressure changes are prone to non-negligible deformation of the tires of the gauge wheel, which greatly affects the measurement accuracy. Moreover, the distance measuring wheel is used for medium and long distance measuring work, and the small deformation will always be superimposed in the rolling of the tire circle by circle, and the calculated measurement length will cause a large measurement error. Therefore, the measuring wheel must be strictly tested before the measurement work to ensure the reliability of the measurement data.

    Vernier calliper
    Vernier calliper is a measuring tool for measuring length, inner and outer diameter, and depth. The vernier caliper consists of a main ruler and a sliding vernier attached to the main ruler. The main ruler is generally in millimeters, and there are 10, 20 or 50 divisions on the vernier. According to the different divisions, the vernier caliper can be divided into tenth-degree vernier caliper, 20th-degree vernier caliper, fifty-point-degree vernier caliper, etc. The vernier is 9mm with 10 scale, 19mm with 20 scale, and 49mm with 50 scale.

    vernier calliper

    Precautions for use
    Wipe the measuring claws clean with a soft cloth, close them together, and check whether the vernier is aligned with the zero mark of the main ruler. If it is aligned, it can be measured: if it is not aligned, the zero error should be recorded: the zero scale line of the vernier is called positive zero error on the right side of the zero scale line on the ruler body, and the negative zero error on the left side of the zero scale line on the ruler body (this The method of specifying the file is consistent with the number axis. The origin is positive on the right and negative on the left. When measuring, hold the ruler with your right hand, move the cursor with your thumb, and hold the object with the outer diameter (or inner diameter) to be measured in your left hand, so that the object to be measured is located between the outer measuring claws, and when it is in close contact with the measuring claws, you can reading.

    Special measurement tools

    • A measuring tool used to measure a certain type of geometric parameters, shape and position errors (see form and position tolerance) It can be divided into:
      Straightness and flatness measuring tools, common ones include straightedge, flat ruler, flat crystal, level, autocollimator, etc.;
    • Surface roughness measurement tools, they commonly are surface roughness samples, light section microscope, interference microscope and surface roughness measuring instrument, etc.
    • Roundness and cylindricity measuring tools, including roundness meter, cylindricity measuring instrument, etc.
    • Gear measuring tools, common gear comprehensive inspection instrument, involute measuring instrument, circumferential section measuring instrument, lead meter, etc.
    • Thread measuring tools.

    Other special measuring tools
    It is only suitable for measuring tools that measure the size, surface roughness, shape and position error of a specific workpiece. Common ones are automatic inspection machines, automatic sorting machines, single-size and multi-size inspection devices (see automatic measurement).

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