1. Introduction
The HYTAIS TS20B is a high-precision, smart digital pen multimeter designed for a wide range of electrical measurements. Its compact and portable pen-type design makes it convenient for both professional and DIY electrical work. Featuring an auto-ranging function, True RMS measurement, and a clear digital display, it simplifies complex electrical testing. This manual provides detailed instructions for safe and effective use of your TS20B multimeter.

Figure 1: HYTAIS TS20B Pen Multimeter highlighting its core functions.
2. Safety Information
Always observe basic safety precautions when using this multimeter to avoid personal injury or damage to the device. Read and understand all safety information before operation.
- Do not exceed the maximum input values specified for each function.
- Ensure the test leads are properly connected and in good condition before making any measurements.
- Do not use the multimeter if it appears damaged or if the battery cover is not properly closed.
- Exercise extreme caution when working with live circuits. Always assume circuits are live until proven otherwise.
- Keep fingers behind the finger guards on the test probes during measurements.
- Replace batteries immediately when the low battery indicator appears to ensure accurate readings.
- Do not operate the multimeter in explosive gas, vapor, or dusty environments.
3. Package Contents
Verify that all items are present and undamaged upon opening the package:
- HYTAIS TS20B Digital Pen Multimeter
- One Black Test Probe
- User Manual

Figure 2: Package contents and device dimensions.
4. Product Overview
The TS20B features a streamlined design with intuitive controls and a clear display.
4.1. Controls and Display

Figure 3: Button functions of the TS20B Multimeter.
- Power/SEL Button: Press and hold for 3 seconds to power on/off. Short press to toggle functions (Diode, Capacitance, Frequency).
- HOLD/Flashlight Button: Short press to activate Data Hold. Press and hold for 3 seconds to activate/deactivate the flashlight.
- NCV/Live Button: Short press to switch between Non-Contact Voltage (NCV) and Live Wire detection modes.
- Display: Digital display showing measurement readings, function indicators (DC, AC, Ω, F, Hz, NCV, Live), and AUTO mode.
4.2. Detachable Probe
The multimeter features a detachable probe design at the rear end for convenient storage and replacement.

Figure 4: Detachable probe for versatility and easy storage.
5. Setup
5.1. Battery Installation
The HYTAIS TS20B requires two AAA batteries (not included) for operation.
- Locate the battery compartment cover on the back of the multimeter.
- Open the battery compartment.
- Insert two AAA batteries, ensuring correct polarity (+ and -).
- Close the battery compartment cover securely.

Figure 5: Battery compartment for two AAA batteries.
6. Operating Instructions
6.1. Power On/Off
Press and hold the Power/SEL button for approximately 3 seconds to turn the multimeter on or off. The display will show "Auto" upon startup, indicating the intelligent automatic measurement mode.
6.2. AUTO Intelligent Measurement Mode
In AUTO mode, the multimeter automatically identifies and measures AC/DC voltage, resistance, and continuity without manual range selection.

Figure 6: Multimeter displaying various measurements in AUTO mode.
6.3. Non-Contact Voltage (NCV) Detection
The NCV function allows for safe detection of AC voltage without direct contact with wires.
- Short press the NCV/Live button to enter NCV mode. The display will show "NCV".
- Bring the tip of the multimeter close to the wire or electrical outlet.
- If AC voltage is detected, the multimeter will beep and the display will show a varying number of dashes (e.g., "---H") indicating signal strength.

Figure 7: Using NCV for non-contact voltage detection.
6.4. Live Wire Detection
This feature helps identify live wires in an electrical system.
- Short press the NCV/Live button repeatedly until "Live" appears on the display.
- Touch the tip of the multimeter to the wire or terminal.
- The multimeter will sound an alarm and display a reading if the wire is live. It will remain silent if it's a neutral wire.

Figure 8: Identifying live wires using the Live detection function.
6.5. AC Voltage Measurement
- Ensure the black test probe is connected to the COM jack and the red test probe is connected to the VΩHz jack.
- In AUTO mode, touch the test probes to the AC voltage source. The multimeter will automatically detect AC voltage and display the reading.

Figure 9: Measuring AC voltage with the multimeter.
6.6. DC Voltage Measurement
- Ensure the black test probe is connected to the COM jack and the red test probe is connected to the VΩHz jack.
- In AUTO mode, touch the test probes to the DC voltage source. The multimeter will automatically detect DC voltage and display the reading.

Figure 10: Measuring DC voltage with the multimeter.
6.7. Resistance Measurement
- Ensure the black test probe is connected to the COM jack and the red test probe is connected to the VΩHz jack.
- In AUTO mode, touch the test probes across the component to measure resistance. The multimeter will display the resistance value.

Figure 11: Measuring resistance with the multimeter.
6.8. Capacitance Measurement
- Short press the Power/SEL button until the capacitance symbol (F) appears on the display.
- Connect the test probes across the capacitor. The multimeter will display the capacitance value.

Figure 12: Measuring capacitance with the multimeter.
6.9. Diode Testing
- Short press the Power/SEL button until the diode symbol appears on the display.
- Connect the red test probe to the anode and the black test probe to the cathode of the diode.
- The multimeter will display the forward voltage drop. Reverse the probes to check for open circuit (OL) or a high reading, indicating a good diode.

Figure 13: Performing a diode test.
6.10. Continuity Test
- In AUTO mode, the multimeter will automatically perform a continuity test if resistance is low.
- Connect the test probes across the circuit or component. If continuity exists (low resistance), the multimeter will emit an audible beep.

Figure 14: Checking for circuit continuity.
6.11. Frequency Measurement
Short press the Power/SEL button until "Hz" appears on the display to enter frequency measurement mode. Connect the test probes to the signal source to measure its frequency.
6.12. Flashlight Function
Press and hold the HOLD/Flashlight button for 3 seconds to turn the built-in flashlight on or off. This is useful for working in dimly lit areas.

Figure 15: Multimeter with its integrated flashlight.
6.13. Data Hold
Short press the HOLD/Flashlight button to freeze the current reading on the display. Press it again to release the hold function.
6.14. Auto Power Off
The multimeter will automatically power off after a period of inactivity to conserve battery life. This feature can typically be disabled or adjusted in advanced settings, though specific instructions are not provided in the available data.
6.15. Video Demonstration
For a visual guide on how to use the HYTAIS TS20B multimeter, please watch the following video:
Video 1: Demonstration of the HYTAIS TS20B multimeter's functions, including power on, flashlight, NCV, live wire detection, AC/DC voltage, resistance, capacitance, and diode testing.
7. Maintenance
- Cleaning: Wipe the multimeter with a dry, soft cloth. Do not use abrasives or solvents.
- Storage: When not in use for extended periods, remove the batteries to prevent leakage. Store the device in a cool, dry place away from direct sunlight.
- Probe Care: Keep the test probes clean and free from corrosion. Replace damaged test leads immediately.
8. Troubleshooting
- No Display/Power: Check battery installation and ensure batteries are not depleted. Replace if necessary.
- Inaccurate Readings: Ensure test leads are properly connected. Check battery level. Verify correct function mode is selected (though AUTO mode handles most common measurements).
- "OL" on Display: This usually indicates an open circuit, a value exceeding the measurement range, or an incorrect connection.
- Slow Response: Low battery can sometimes cause slow response times. Replace batteries.
9. Specifications
The following table outlines the key functional parameters and general specifications of the HYTAIS TS20B Digital Pen Multimeter:
| Parameter | Value |
|---|---|
| Model Number | TS20B |
| Brand Name | HYTAIS |
| Operating Mode | Auto Range |
| Display Type | Digital Display |
| Maximum Display | 4000 Counts |
| DIY Supplies | Electrical |
| Origin | Mainland China |
| Battery Included | No |
| High-concerned chemical | None |
| AC Voltage | 1V ~ 600V ± (1.0%+5) |
| DC Voltage | 1mV ~ 600V ± (0.8%+5) |
| Resistance | 1Ω ~ 40MΩ ± (0.8%+5) |
| Capacitance | 1pF ~ 40mF ± (4.0%+5) |
| Frequency | 0.1Hz ~ 10MHz ± (0.1%+5) |
| Continuity Buzzer | Yes |
| Diode | Yes |
| Flashlight | Yes |
| Auto Power Off | Yes |
| Data Hold | Yes |
| Low Voltage Display | Yes |
| Body Dimensions | 184.5 x 25.7 x 29.2 mm |
| Body Weight | Approximately 75g (Including Battery) |
| Power Supply | AAA*2 Batteries |
Table 1: HYTAIS TS20B Functional Parameters.
10. User Tips
- For quick checks, the AUTO mode is highly efficient as it automatically detects the measurement type.
- Utilize the NCV and Live functions for initial safety checks before making direct contact with wires.
- The compact size and flashlight make this multimeter ideal for tight spaces and low-light conditions.
- Always ensure a firm connection with the test probes to get stable and accurate readings.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact details provided by your retailer or the official HYTAIS website. Keep your purchase receipt as proof of purchase for any warranty claims.




