YEX-L1-PH-ORP Benchtop pH/ORP Analyzer for Laboratory Water Testing | YexSensor

YEX-L1-PH-ORP Benchtop pH/ORP Analyzer: Reduce Calibration Variation and Prevent Gaps in Laboratory Records

• Three measurements on one instrument: Measure pH, ORP and temperature without switching between separate meters or duplicating records.
• High resolution with stated accuracy: pH resolution is 0.01 pH with ±0.05 pH indication error; ORP resolution is 0.1 mV with ±0.1% F.S. indication error.
• Results that are easier to review: Use continuous, interval or equilibrium measurement, retain measurement and calibration records, and export them through USB.

Product Overview

The YexSensor YEX-L1-PH-ORP is a benchtop analyzer for water laboratories, industrial quality-control laboratories, environmental monitoring and teaching. It presents pH, oxidation-reduction potential and temperature on one clear color display. Physical keys, an adjustable electrode stand and record-management functions simplify routine work. For teams that repeat tests, compare batches and trace results, the instrument reduces manual transcription, inconsistent endpoint decisions and fragmented calibration records.

This model is designed for benchtop laboratory measurement. The manual specifies USB for record export and does not list RS-485/Modbus. Projects that require PLC or SCADA connectivity or continuous online monitoring should use a YexSensor online sensor and controller configuration rather than treating a laboratory analyzer as an automation instrument.

Key Technical Advantages

Multipoint Calibration and Temperature Compensation Reduce Operator Variation

The pH channel supports automatic 1–5 point calibration with GB, USA, NIST/INST and DIN buffer groups. With a temperature probe connected, the instrument can apply automatic temperature compensation; manual temperature compensation is also available when required by the test method. The screen shows pH, potential, temperature and electrode slope together, helping the operator assess calibration quality instead of looking only at the final reading.

Stability Criteria and Three Measurement Modes

Continuous mode is suitable for observing response trends. Interval mode supports up to 99 measurements with intervals up to 999 seconds. Equilibrium mode confirms the result against a stability criterion, with Fast 0.5 mV, Medium 1 mV, Slow 2 mV and a custom setting. Laboratories can select the mode according to sample response and their quality procedure to improve consistency between operators.

Proper Grounding and Connections Reduce Interference Risk

pH measurement uses a high-impedance signal, so stability depends on both the instrument and the installation environment. The YEX-L1-PH-ORP provides a ground terminal, a dedicated temperature-probe input and a BNC electrode input. Keeping the BNC connector clean and dry and locating the instrument away from motors, variable-frequency drives, strong electromagnetic fields, heat sources and corrosive vapors reduces the effect of static electricity, leakage current and external electrical noise.

Record Management, Export and Routine Administration

Measurement and calibration records can be stored and exported through USB for batch review, quality-system documentation and investigation of abnormal results. Chinese and English interfaces support mixed teams. Display brightness, automatic power-off and the 0–168 hour calibration reminder can be configured to match laboratory procedures.

Technical Specifications

Typical Applications

Environmental and Surface-Water Laboratories

Use the analyzer to verify pH, ORP and temperature in water samples, compare trends and support monitoring-data quality control.

Pharmaceutical and Quality-Control Laboratories

Multipoint calibration and retained measurement and calibration records support repeat testing under documented procedures.

Food and Beverage Testing

Check acidity/alkalinity and oxidation-reduction conditions in raw materials, process water and finished-product samples.

Textile and Industrial Water Laboratories

Compare process solutions, rinse water and samples before and after treatment to identify batch variation.

Teaching and Method Development

The color display presents the reading, potential, temperature and slope together, making calibration and electrode response easier to demonstrate.

Connection and Installation Guidance

Place the analyzer on a stable, dry laboratory bench with sufficient working space. Connect the pH/ORP electrode, the reference electrode when required by the method, and the temperature probe before applying 12 VDC power. Rear connections include the BNC pH/ORP input, reference-electrode input, temperature-probe input, ground terminal, USB port and power input. Where interference is a concern, connect the ground terminal according to laboratory practice and avoid noisy power circuits shared with motors, variable-frequency drives or other high-power equipment.

Condition, rinse and calibrate the electrode according to its instructions before measurement. When changing samples, rinse the electrode with pure water and gently blot surface moisture with a lint-free tissue; do not wipe the glass sensing membrane. Store the pH electrode in the specified KCl solution, not dry and not in deionized water. A two-week interval can be used as an initial calibration schedule for routine work, then adjusted according to sample matrix, frequency of use and quality-control results.

Quality Assurance and After-Sales Information

YexSensor provides a one-year limited warranty from the purchase date, subject to the sales agreement. Electrodes, consumables, accessories and damage caused by misuse are normally outside the standard warranty unless otherwise agreed in writing. Because the manual does not define one fixed package list for every order, the quotation should itemize the main unit, electrodes, temperature probe, stand, adapter, buffer solutions and any other accessories so that the delivered configuration matches the test method.

Frequently Asked Questions

1. Which parameters can the YEX-L1-PH-ORP measure?

It measures pH, ORP and temperature. The temperature reading can also be used for automatic pH temperature compensation. pH and ORP share the electrode input, so the corresponding electrode must be connected for each test.

2. How many pH calibration points are supported?

The analyzer supports automatic 1–5 point calibration. One- or two-point calibration is suitable for routine work; multipoint calibration is appropriate when the sample range is wider or the method has stricter requirements. Select the buffer group used by the laboratory.

3. Is a temperature probe required for automatic temperature compensation?

Yes. Connect the temperature probe correctly when using ATC. If no probe is connected or the method requires a fixed temperature, MTC can be used. Confirm whether the temperature probe is included in the quotation.

4. How can consistency be improved for weakly buffered or slow-responding samples?

Use equilibrium mode and select the Fast, Medium, Slow or custom stability criterion according to the response. Also control stirring, immersion depth, temperature, waiting time and electrode cleanliness instead of relying on an instantaneous reading.

5. Can this model connect directly to a PLC or SCADA system?

The manual specifies USB record export and does not list RS-485/Modbus. This model is intended for laboratory data management and is not a direct PLC online instrument. For automation, select a YexSensor online pH/ORP sensor, controller or gateway configuration.

6. How can drift caused by electromagnetic interference be reduced?

Keep the BNC connector clean and dry, provide correct grounding, and route the instrument and electrode cable away from motors, variable-frequency drives and strong electromagnetic fields. If moving the instrument changes the drift, check grounding, power and electrode condition before diagnosing an instrument fault.

7. Which records can be exported through USB?

The manual states that measurement and calibration records can be managed and exported. If the project requires a particular file format, field layout or LIMS import, provide a sample file before purchase so YexSensor can confirm the supplied version.

8. What information is needed for a quotation?

Provide the sample type, expected pH/ORP range, temperature, daily test volume, buffer standard, record-retention requirements, required electrode type, quantity and destination. These details help define the complete main-unit, electrode, temperature-probe, stand and consumables package rather than comparing the meter alone.

Summary

The YEX-L1-PH-ORP is designed for water laboratories, industrial laboratories and quality-control work that requires pH, ORP and temperature on one instrument. Automatic 1–5 point pH calibration, ATC/MTC and stable endpoint determination improve consistency between operators and batches, while measurement and calibration records can be exported through USB for review and documentation.

This is an IP54 laboratory benchtop instrument for offline sample testing, not an RS-485/Modbus online control device. For a quotation, provide the sample type, expected range, temperature, calibration standard, daily test volume and required electrodes and accessories. YexSensor will use this information to confirm a suitable configuration and complete delivery list.