Changzhou Hopetech Electronic Technology Co., Ltd., founded in 2009, is a national high-tech enterprise integrating R&D, manufacturing, sales and service. We participate in the formulation of national metrology standards and deliver domestic alternatives for multiple imported test instruments.
For the connection-component industry, Hopetech builds a complete test-instrument portfolio covering contact-resistance testing, high-current contact-reliability verification, on-site inspection, high-precision calibration and airtight-sealing detection. It covers full workflows including incoming-goods inspection, laboratory calibration, production-line batch sampling, on-site after-sales inspection and IP-rated waterproof-sealing validation. It meets diverse test requirements for general connectors, precision aerospace terminals, high-current high-voltage connectors and IP67/IP68 waterproof components. Our products serve global manufacturers, supporting communication-protocol integration and remote technical support.

HT3540 Economical DC Resistance Tester: Mass-production Quality Gatekeeper Cost-effective general low-resistance measurement. It handles mass-production sampling for ordinary connectors, micro-switches and small relays, quickly screening out parts with excessive contact resistance for routine incoming and factory-release inspection.
HT3545 / HT3542 High–precision DC Resistance Tester: Precision–component Calibration Specialist High-accuracy low-resistance measurement. It identifies minor contact-resistance deviations for aerospace terminals, precision connectors and signal relays, supporting R&D, laboratory calibration and outgoing-quality confirmation for high-end connection components.
CHT9930A/CHT9931A Ground-Continuity Tester: High-current Condition Validator Delivers continuously adjustable DC 10-100 A output to replicate real-world high-current working conditions. It validates contact reliability for high-voltage connectors, power-relay contacts and high-current terminal loops, and detects hidden risks of contact overheating & poor contact under high-current stress.
HT/CHT3548 Handheld DC Resistance Tester: On–site Mobile Inspector Portable handheld design free from lab-bench constraints. Used for on-site commissioning and after-sales sampling, it re-measures contact resistance of connectors and switches on-site to rapidly locate field failures.
DP3115B/–2/–4 Differential–Pressure Airtightness Tester: Sealing–performance Investigator Differential-pressure detection with 0.1 Pa resolution for capturing extremely faint leaks. It performs IP67/IP68 sealing-performance tests for waterproof connectors, sealed relays and waterproof switches, screening micro-leakage defects invisible to naked eyes.
Hopetech’s test-instrument portfolio for connection-components covers five application scenarios: cost-effective mass-production sampling, high-end precision calibration, high-current contact-reliability verification, handheld on-site inspection and IP-rated waterproof airtightness testing. Multiple instruments can work in combination. They deliver full-lifecycle test coverage for connectors, relays, switches, terminal blocks and waterproof electromechanical components, ranging from incoming inspection, lab R&D and production-line testing to on-site after-sales service. Our solutions help customers detect risks such as poor contact, bad crimping and microleakage, improve finished-part quality of connection components and reduce after-sales failure risks.

| Test Category | Application / Materials | Model | Core Functions |
| Connection-component test(Connectors, relays, switches, terminal blocks, waterproof electromechanical components) | Contact-resistance test for high-voltage connectors & power-relay contacts; contact-reliability verification under simulated high-current conditions | CHT9930A/CHT9931A Ground-Continuity Tester | Continuously adjustable DC 10-100 A output; resistance measurement range: 0.1 μΩ ~ 600 mΩ |
| Routine contact-resistance test for ordinary connectors, micro-switches and small relays | HT3540 Economical DC Resistance Tester | General low-resistance measurement, cost-efficient for mass sampling of small-to-medium electromechanical components | |
| Precision contact-resistance calibration for precision connectors, aerospace terminals and signal relays | HT3545/HT3542 High-precision DC Resistance Tester | High-accuracy low-resistance measurement for performance testing of high-end precision connection components | |
| On-site after-sales sampling of contact resistance for connectors and switches | HT/CHT3548 Handheld DC Resistance Tester | Hand-held portable design supporting mobile on-site measurement and calibration | |
| IP67/IP68 waterproof & sealing-performance test for waterproof connectors, sealed relays and waterproof switches | DT3115B/-2/-4 Differential-Pressure Airtightness Tester | Differential-pressure detection principle; 0.1 Pa resolution; multi-channel optional; built-in standard IP-rating test programs for fast micro-leakage screening |