OEM 3-in-1 Combo Machine | TENS & EMS Hardware | TOP-RANK
OEM dual-channel pulse generator. Integrates TENS, EMS, and bionic massage firmware on a single PCBA. Features constant current output up to 100mA at 500 Ohms.
Product Overview
The 3-in-1 combo machine is a multi-modal electrotherapy hardware platform. The internal PCBA integrates distinct firmware protocols to output high-frequency pain-gating signals (TENS), low-frequency motor unit recruitment pulses (EMS), and modulated bionic sequences (Massage). B2B retail brands and pharmacy chains deploy this unit as a primary OTC consumer physical therapy device.
Key Features
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Multi-Modal Firmware Switching
TENS relies on high-frequency continuous output (e.g., 80-120Hz) to interrupt neural pain pathways. EMS requires a strict duty cycle (e.g., 5 seconds ON, 10 seconds OFF) at lower frequencies (e.g., 35Hz) to force muscle tetany followed by physical relaxation. The MCU overrides the boost converter's modulation in real-time, executing these exact timing parameters from a single hardware interface.
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Constant Current Closed-Loop
Skin hydration alters the electrical load during a standard 30-minute session. A constant-voltage machine causes the actual current to drop when sweat dries on the epidermis. This PCBA measures the dynamic resistance at the electrode interface. The MCU adjusts the internal voltage continuously to lock the actual delivered mA output to the intensity level selected by the user.
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Bionic Kneading Modulation
The massage mode abandons fixed frequencies. The firmware utilizes a ramp-up and ramp-down modulation sequence. The pulse width expands and contracts (e.g., sweeping from 100µs to 250µs over a 2-second interval). This phase-shifting directly replicates the mechanical pressure sensation of physical tissue manipulation.
Applications
OTC Pharmacy Retail
Shelf-ready hardware for mass-market pain management and recovery.
Sports Recovery
EMS recruitment for post-training lactic acid clearance.
Chronic Pain Protocols
Neuropathic pain masking using high-frequency TENS.
OEM & Private Label
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UI/UX Customization : Liquid Crystal Display (LCD) mapping, backlight colors, and specific ABS casing Pantone matches are established during the injection molding and firmware flashing phases.
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Supply Chain Routing : PCBA SMT and plastic injection run in China. Final assembly, battery integration, and retail boxing are executed at our Vietnam facility to build supply chain resilience and manage regional logistics costs.
Certifications
Regulatory : Hardware architecture supports FDA 510(k) Class II and CE MDR clearances.
Systems : Assembly lines audited to ISO 13485:2016 and MDSAP.
Electrical Safety : Tested against IEC 60601-1 (General Safety) and IEC 60601-1-2 (EMC) parameters.
FAQ
Q: Can the user run TENS on Channel 1 and EMS on Channel 2 simultaneously?
A: This depends on the selected PCBA topology. Standard entry-level models use a single MCU timer, forcing both channels to output the same mode. Dual-oscillator hardware configurations are available to allow asynchronous multi-mode operation across the isolated channels.
Q: How does the machine handle a disconnected electrode pad?
A: The hardware monitors the circuit impedance. If the resistance spikes above 2000 Ohms, the MCU triggers an open-circuit fault. The firmware cuts the output to 0mA within 50 milliseconds. This prevents a high-mA shock hazard if the pad is pressed back onto the skin.
CTA
B2B retail buyers can request PCBA technical specification files and bare-metal testing prototypes.
👉 [Request Combo Machine Prototypes]
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Specifications
| Parameter | Metric Configuration | Engineering Detail |
| Channels | Dual Isolated | Transformer-level separation |
| Output Current | 0 - 100mA | Measured at 500 Ohm load |
| Waveform | Asymmetrical Biphasic Square | Zero net DC charge |
| Pulse Width | 50 - 300 µs | Firmware adjustable |
| Pulse Rate | 1 - 150 Hz | Mode-dependent switching |
