A multi-function electrical safety tester is a versatile, all-in-one instrument designed to evaluate the safety, integrity, and compliance of electrical devices, systems, and components. It combines several tests—typically hipot (dielectric strength), insulation resistance, ground bond, and leakage current—into one unit to ensure compliance with standards like IEC/EN 61557.

Key functions and features can be combination:

• AC or DC Hipot/Dielectric Withstand voltage testing: Tests insulation at high voltage (AC or DC).
• Insulation Resistance: Measures the quality of insulation on wires, motors, and transformers.
• Ground Continuity/Bond: Ensures that the protective earth connection is low enough to protect users.
• Leakage/Touch Current: Evaluates the risk of shock by measuring leakage current.

Tessio has provided testers for all kind of multifunction testers are 2 functions in one tester, 3 functions in one Tester and 4 functions in one Testers to let the customer satisfied in all requirements

TX-9300 series : it's 2nd generation of Hipot Tester, a compact, economical and intelligent hipot tester designed for simple high-voltage insulation tests. Lightweight and high-performance. Display panel is key-pad/knobs, operation by push bottom. (2-3 functions in one unit)

TES-9700 & TES-9700X series : In new generation of Hipot Tester has operation by Touch-screen. AC/DC Hipot and insulation Tester integrates AC/DC Hipot, insulation resistance, arc detection, open circuit detection and other functions. It is compact size and light, accurate and efficient, reliable and stable and has rich interfaces. (2-3 functions in one unit)

TES-9630 series : High-Power current cut off type (upto 1000mA), Hipot Analyzer/Tester with integrates AC/DC Hipot, insulation resistance, arc detection, open circuit detection and other functions. It is accurate, efficient, reliable and stable, has rich interfaces and touch screen operation. The series of products are small in size, light in weight, making them ideal for desktop testing, system integration and other working conditions. (2-3 functions in one unit)

TES-9700K series : 10kV/20kV (High-voltage range) Withstand voltage and insulation tester is a three-in-one instrument (ACW/DCW/IR) that offers high voltage (supports 20kV AC and DC outputs), compact size (4U high-density housing) and high accuracy (withstand voltage accuracy up to 1%, insulation range up to 50GΩ).

TES-9620 series : It is 4 functions in one Electrical Safety Tester and it's a compact, multifunctional electrical safety tester with AC/DC withstand, insulation, and ground bond tests. Delivers 1% high accuracy and fast 0.5s operation for efficient, stable performance. Features rich I/O interfaces and intuitive touch-screen control for easy use.