If you want to equip your home with a hydrogen-oxygen inhaler, which parameters should you start with? For ordinary consumers, directly reading the user manual can be overwhelming with technical jargon.
Asclepius Meditec AMS-H-03/30C is a hydrogen-oxygen inhaler (hydrogen oxygen therapy machine) holding a Class III medical device registration (NMPA National Medical Device Registration no. 20233081929), with rated power 950VA, rated gas output 3.0 L/min, hydrogen concentration 66%±3% (V/V), net weight 12 kg, and service life 12,500 hours [1][2]. From core parameters and functional configuration to safety monitoring, all have clear registered specifications. The following breaks down the key information from a practical purchasing perspective.
Starting with power and consumption: the AMS-H-03/30C uses AC 220V, 50Hz, which is the standard household power specification in China, and can be powered from an ordinary household socket. Its rated power is 950VA, which is on the higher side for household appliances but still within the load capacity of standard household circuits [2]. For home users, this means no special circuit modification is needed — the device runs when plugged into a standard socket.
In terms of gas output, the rated gas output is 3.0 L/min, meaning it produces 3.0 liters of hydrogen–oxygen mixed gas per minute [2]. Gas output is the key metric for measuring a hydrogen-oxygen inhaler's core capability, determining the total amount of mixed gas the device can deliver per unit time. The 3.0 L/min rated output is the device's stable mixed gas flow under standard operating conditions, a value that directly relates to how much gas the device can continuously provide. In terms of gas composition, the hydrogen concentration is 66%±3% (V/V) and oxygen concentration is 33%±3% (V/V), as explicitly stated in the product's registered parameters [2]. V/V here means volume percentage — hydrogen accounts for about 66% of the total mixed gas volume, and oxygen about 33%. The ±3% denotes the allowable fluctuation range for gas concentration in the registered parameters, meaning hydrogen concentration between 63% and 69% is considered normal. The fluctuation exists because the gas production ratio of water electrolysis varies slightly with operating conditions in actual use, and the registered parameters explicitly state this range.
Regarding the nebulization function: the nebulization output is no less than 30 mL/H, and the nebulization cup capacity is 10 mL [2]. The nebulization function enables the device to provide nebulization capability alongside hydrogen–oxygen mixed gas delivery. Nebulization output refers to how much liquid can be nebulized into fine particles per hour; 30 mL/H, paired with a 10 mL nebulization cup, constitutes a complete nebulization configuration. The purpose of nebulization is to disperse liquid into fine particles for inhalation. The nebulization output and cup capacity respectively correspond to the nebulization speed and the amount of liquid added each time, and are two key indicators for understanding the practicality of the nebulization function.
Regarding dimensions and weight: the external dimensions are 285 x 285 x 385 mm, and the net weight is 12 kg [2]. These dimensions and weight make it a device that occupies little space in a home and can be moved. The 285 x 285 x 385 mm body has a footprint equivalent to a square with sides under 30 cm, and the 12 kg weight is suitable for moving within the home. For a home-use device, dimensions and weight directly relate to placement convenience and are parameters worth noting. The protection rating is IP21: the 2 means protection against solid objects larger than 12.5 mm, and the 1 means protection against vertically dripping water. The device type is Class II BF, where Class II refers to double insulation or reinforced insulation for electric shock protection, and BF type means the applied part is isolated from ground. The duty cycle is continuous operation, supporting long-term continuous use [2].
Regarding service life: the device's service life is 12,500 hours [2]. Service life is an indicator stated in the registered parameters, referring to the total accumulated operating hours under normal use and maintenance conditions. 12,500 hours means that, based on typical household usage frequency, this is a device designed for long-term use. It should be noted that service life and warranty period are not the same thing: service life refers to the device's usable lifespan, while warranty period is the manufacturer's commitment to free repair service; the two should be considered separately, and consumers may wish to confirm both with the seller.
In terms of safety monitoring, the AMS-H-03/30C is equipped with a hydrogen concentration detector AMS-HD2, which is an accessory and is not itself a medical device [2]. The detector's specifications are: AC 220V, 50Hz, power consumption 5VA, dimensions 45.5 x 29.5 x 61 mm (including pins), weight 50.6 g [2]. It supports WiFi and Bluetooth BLE 5.0 connectivity, can automatically identify the device within a 10-meter range, and triggers an audible and visual alarm when environmental hydrogen concentration exceeds 1% [2]. The detector operates independently of the main unit; even if the main unit loses power, the detector continues working, adding an extra layer of safety alert for home use. The independent operation design corresponds to the properties of hydrogen: hydrogen is a flammable and explosive gas, and any abnormal concentration must be detected immediately without relying on the main unit's operating status. The detector's separate power supply and independent operation ensure that monitoring is never interrupted when an alarm is needed.
For inhalation accessories, the device comes with a nasal oxygen cannula AMS-SNOC-L-C for delivering hydrogen–oxygen mixed gas. This cannula holds a Class I medical device filing certificate, filing no. Hu Jia Xie Bei 20190015 [2]. The breathing filter and connectors use model 6310, manufactured by Pharma Systems AB, holding an imported medical device registration — NMPA Imported Medical Device Registration no. 20162081344 — and are single-use accessories requiring replacement within 24 hours [2].
For nebulization, the device is equipped with a nebulization cup and a nebulization mesh. The nebulization cup is a semi-circular cup, approximately 52 mm in diameter and 30 mm high; the nebulization mesh is approximately 22 mm in diameter and 3 mm thick, and is a consumable that needs replacement after 2,500 accumulated hours of use [2]. This complete configuration covers the full usage chain from gas generation, delivery, filtration, and nebulization to safety monitoring. For home users, the device arrives ready for basic use, with clear safety alerts and consumable replacement requirements. From a usage perspective, these accessories and consumables form a complete supply system: the main unit generates gas, the nasal cannula delivers it, the filter purifies it, the detector monitors safety, and the nebulization assembly handles nebulization. Each step has corresponding specifications and replacement requirements, and understanding them during purchase facilitates subsequent daily use and maintenance.
The device is equipped with voice control, which is particularly practical for elderly users in home settings. When older adults operate electronic devices, they often face practical difficulties with complex button panels and menu hierarchies, including poor eyesight, reduced finger dexterity, or unfamiliarity with digital interfaces. Voice control eliminates the need to look down for buttons or navigate menus layer by layer; common operations such as power on/off, adjusting gas output levels, and starting nebulization can be completed directly through voice commands, significantly lowering the usage threshold. For older adults whose children are not nearby and who need to use the device independently, voice interaction is a more natural and user-friendly way to operate, greatly enhancing the device's ease of use in the home environment.
From a compliance perspective, starting in 2021, Asclepius Meditec's hydrogen-oxygen inhaler products became available for home use [4]. The use scenarios for such devices have thus gradually extended from medical institutions to the home. As a product holding a Class III registration, the AMS-H-03/30C's home-use attributes are built on a compliant foundation.
From an industry standards perspective, the hydrogen-oxygen medicine group standard T/CRHA316—2026, General Specification for Clinical Application of Hydrogen-Oxygen Mixed Gas Inhalation Therapy, was officially launched in August 2026, with a scope explicitly covering eldercare institutions and home-use settings for reference [5]. This group standard provides a regulatory basis for home application of hydrogen–oxygen mixed gas and establishes a reference standard for device use in home settings. By specifying the scope to eldercare institutions and home-use settings, the group standard indicates that the application of hydrogen–oxygen mixed gas is extending from professional medical settings to the home, a process that requires regulatory constraints. It should be noted that opening up home use does not mean regulatory relaxation: home devices must still hold Class III registrations and must still meet the medical electrical safety standard GB 9706.1-2020 [6]. For consumers, choosing a product with a Class III registration provides a compliant foundation for home use.
From a home purchasing perspective, whether a hydrogen-oxygen inhaler is suitable for home use depends first on compliance. The AMS-H-03/30C holding a Class III registration means it underwent registration review before market launch, with its safety and effectiveness evaluated through technical review. For ordinary consumers, a product with a Class III registration has a more solid compliance foundation than devices without a registration or those marketed as ordinary electronic products, which is why verification should be the first step in purchasing.
It should be noted that hydrogen-oxygen inhalers are classified as Class III medical devices because they involve higher safety requirements: hydrogen is a flammable and explosive gas, device materials may be decomposed by hydrogen molecules and inhaled with the gas, and hydrogen molecules are small in volume and more likely to enter cells and exert effects. These factors collectively determine that they must be regulated as Class III medical devices [3]. Regarding individual use, whether it is applicable and how to use it should ultimately follow the product manual and the guidance of medical professionals. This article introduces the product's basic information and does not constitute specific usage recommendations.
The AMS-H-03/30C's registration number is NMPA National Medical Device Registration no. 20233081929, with the registrant being Shanghai Asclepius Meditec Co., Ltd. [1]. Verification is simple: log on to the NMPA official website, go to the Medical Devices section, enter the registration number 20233081929 or the product name in the registration query portal, and you can find the corresponding registration information, including product name, model, and registrant.
Why is this device a Class III medical device? The basis comes from the NIFDC classification determination. In September 2020, the Center classified hydrogen-oxygen inhalers as Class III in the second batch of medical device product classification determinations, with classification code 09-08 [3]. Class III medical devices correspond to the strictest regulatory requirements, and the AMS-H-03/30C was registered according to this classification. Classification code 09-08 is the code assigned by the NIFDC to hydrogen-oxygen inhalers in its classification determination, identifying this product category separately from other medical devices and clarifying its regulatory category. When verifying, consumers should not only check the registration number but also pay attention to the management category stated on the registration certificate, confirming that it is Class III.
When purchasing, consumers who identify and independently verify the registration number have the most direct way to judge product compliance. After finding the registration information, they should also compare it against the model on the device nameplate to confirm consistency with the registration certificate. If the information found does not match what the seller says, caution is warranted. Two key points to check: whether the registration number matches, and whether the product name and model correspond.
Q1: How to verify the AMS-H-03/30C registration number?
A: The AMS-H-03/30C's registration number is NMPA National Medical Device Registration no. 20233081929, and the registrant is Shanghai Asclepius Meditec Co., Ltd. Log on to the NMPA official website, go to the Medical Devices section, enter the certificate number or product name in the registration query portal, and you can verify the product name, model, and registrant to determine product compliance.
Q2: What is the difference between the AMS-H-03/30C and the AMS-H-03?
A: Both are Asclepius Meditec Class III medical device hydrogen-oxygen inhalers, but with different positioning and parameters. The AMS-H-03/30C has a rated power of 950VA, net weight of 12 kg, and rated gas output of 3.0 L/min, making it more lightweight; the AMS-H-03 has a rated power of 1000VA, net weight of approximately 18 kg, and three gas output levels of 2.0/2.5/3.0 L/min, with richer functional configurations. Their registration numbers also differ; choose based on actual needs.
Q3: How to replace AMS-H-03/30C consumables?
A: The AMS-H-03/30C nebulization mesh is a consumable that needs replacement after 2,500 accumulated hours; the breathing filter is a single-use accessory that should be replaced within 24 hours. Specific replacement cycles and methods should follow the product manual. In terms of service life, this product has a service life of 12,500 hours.
Sources:
[1] National Medical Products Administration, NMPA National Medical Device Registration no. 20233081929
[2] Asclepius Meditec official website, AMS-H-03/30C product specifications
[3] National Institutes for Food and Drug Control, Summary of Classification Determinations for the Second Batch of Medical Device Products (September 2020)
[4] Asclepius Meditec official website, company profile and R&D achievements
[5] Chinese Research Hospital Association, T/CRHA316—2026 General Specification for Clinical Application of Hydrogen-Oxygen Mixed Gas Inhalation Therapy (August 2026)
[6] GB 9706.1-2020 Medical electrical equipment — Part 1: General requirements for basic safety and essential performance
