DoctorsMan DAYS TM-1 Hydrogen Gas Injector Review, Test Results & Discount

DoctorsMan DAYS TM-1 Review & Test Results

The DoctorsMan DAYS TM-1 is a specialized high-pressure hydrogen gas injector designed to produce hydrogen-rich bottled water on demand. Instead of generating hydrogen through an electrolytic cell during every serving, the DAYS system stores hydrogen in a rechargeable metal-hydride alloy tank and injects the gas into a sealed water bottle.

The system includes pressure gauges, specialized injection tubing, dedicated bottle caps with one-way check valves, a three-second injection switch, and a stainless-steel housing surrounding the Tankman hydrogen storage tank.

Independent H2HUBB testing using H2Blue® reagent measured an average dissolved-hydrogen concentration of approximately 4.0 mg/L at the manufacturer-rated preset pressure of 0.3 MPa or 43.5 psi. The standard deviation was approximately 0.06 mg/L, and the measured peak was also approximately 4.0 mg/L.

The tested 500 mL bottle contained approximately 2.0 mg of dissolved H₂, equivalent to approximately 24.28 mL of dissolved hydrogen gas. This represents a strong measurable dose from one prepared bottle.

To prepare the tested bottle, hydrogen was injected for approximately three seconds. The bottle was then shaken for approximately 30 seconds to improve contact between the pressurized hydrogen gas and water before the concentration was measured.

H2HUBB observed no increase in the water’s pH during testing. Based on its verified concentration, dose, tank capacity, pressure controls, one-way bottle-cap system, and overall operation, the DAYS TM-1 received the H2HUBB Seal of Approval.

H2HUBB-Verified Hydrogen Dose

Based on the independently measured results in the tested 500 mL bottle:

• Manufacturer-Rated Pressure: 0.3 MPa or approximately 43.5 psi
• Average Concentration: Approximately 4.0 mg/L
• Standard Deviation: Approximately 0.06 mg/L
• Peak Concentration: Approximately 4.0 mg/L
• Hydrogen Dose: Approximately 2.0 mg per 500 mL bottle
• Equivalent Dissolved Gas Volume: Approximately 24.28 mL H₂
• Two Bottles: Approximately 4.0 mg of dissolved H₂

High-Pressure Laboratory Capacity

H2HUBB also evaluated the system at a laboratory pressure of at least 0.8 MPa or approximately 116 psi. At that setting, the device produced an average concentration of approximately 10.0 mg/L, a peak of approximately 10.75 mg/L, and approximately 5.0 mg of dissolved H₂ in 500 mL.

These higher-pressure results document the system’s technical capacity. They are not consumer operating instructions. The H2HUBB report directs users to operate the DAYS TM-1 exclusively at the manufacturer-rated preset pressure.

Tank Capacity and Number of Bottles

At the preset pressure, H2HUBB measured approximately 125–130 mL of hydrogen gas per injection. The tested tank completed approximately 75 injections before its pressure decreased below the level required to maintain normal preset-pressure performance.

The measured results indicate an approximate total tank capacity of 9–10 L of hydrogen gas. At one injection per 500 mL bottle, this corresponds to approximately 37.5 L of prepared hydrogen water before the tank requires recharging.

• One Bottle per Day: Approximately 75 days of use
• Two Bottles per Day: Approximately 37 days of use
• General Estimated Range: Approximately one to three months, depending on frequency

Actual tank life can vary with pressure adjustment, injection duration, tank condition, connection losses, frequency of use, and refill procedures.

Independent Test Procedure

For the H2HUBB evaluation, a 500 mL bottle was filled with distilled water while leaving a small amount of headspace. The dedicated one-way cap was tightened, and the injection tubing was securely connected.

Hydrogen gas was injected for approximately three seconds at the selected pressure. The bottle was then shaken for approximately 30 seconds before the cap was removed and dissolved-hydrogen concentration was measured immediately using H2Blue reagent. The measured values were converted to SATP.

Pressure and Operating Safety

The DAYS TM-1 is a pressurized hydrogen system. Consumers should not modify the pressure setting, pressure regulators, gauges, tank fittings, injection timing, tubing, bottle caps, or check valves.

Operate the device only at the manufacturer-rated preset pressure and follow the supplied instructions for tank installation, gas injection, bottle agitation, pressure release, tank removal, storage, transport, and recharging.

Hydrogen is flammable. Keep the device, tank, tubing, prepared bottles, and any released gas away from flames, smoking materials, sparks, static discharge, heating elements, and other ignition sources. Use the system only in a suitably ventilated location.

Bottle-Cap Compatibility

The tested system used specialized bottle caps with one-way valves. The H2HUBB report notes that the supplied caps were designed around the 30 mm bottle-cap format commonly used in Japan.

Many standard U.S. disposable water bottles use 28 mm caps. Buyers in the United States should confirm bottle compatibility and obtain any required 28 mm adapter before purchasing.

DoctorsMan DAYS Discount

Shop the DoctorsMan DAYS TM-1 through H2HUBB and receive a $540 discount, including free shipping. The current H2HUBB offer reduces the price from $7,040 to $6,500.

Because the system uses a specialized rechargeable hydrogen tank, contact H2HUBB before purchasing to confirm availability, tank-refill arrangements, bottle-cap compatibility, shipping terms, and product-support requirements.

Learn more about how H2HUBB evaluates hydrogen products in our H2HUBB Product Performance Standards.