Compare HOCl generators: Eco One, Hypo 7.5 and EWCO 300
All three machines make a hypochlorous acid (HOCl) cleaning solution on site from salt, water and electricity. The Eco One and Hypo 7.5 make it in batches, and the EWCO 300 makes it in continuous flow, so the right one depends on how much solution you use each day.
Side by side
| Specification |  Eco One |  Hypo 7.5 |  EWCO 300 |
|---|---|---|---|
| Full name | Eco One Portable Hypochlorous Acid (HOCl) Machine | Hypo 7.5 Hypochlorous Acid (HOCL) Generator | EWCO 300 Hypochlorous Acid Generator |
| How it works | Batch | Batch | Continuous flow |
| Output (ppm) | 40, 60, 100, 200 or 500 ppm | 200 or 500 ppm | 20 to 300 ppm free available chlorine, set by flow rate and additive (see the flow table below) |
| Batch size or flow | 1 L batch (the pitcher holds 1.5 L; fill to the 1 L line) | 7.5 L (2 gal) batch | 1.5 to 6.0 L/min |
| Time per batch | 40 ppm in 3 min, 60 ppm in 5 min, 100 ppm in 8 min, 200 ppm in 16 min, 500 ppm in 40 min | 200 ppm in 8 min, 500 ppm in 20 min | Continuous |
| Hourly or daily output | Not listed | Not listed | Not listed |
| Inputs | Water and food-grade non-iodized salt (2 g per 1 L for 200 ppm). Add 1 tsp of 5% distilled vinegar at 200 ppm, or 2 tsp before the 40-minute 500 ppm run, for pH 5 to 6. Optional potassium carbonate makes a KOH degreaser (don't mix it with salt). | Water and 2 scoops of table salt (iodized or non-iodized). Add 2 scoops of 5% vinegar at 200 ppm or 4 scoops at 500 ppm, for pH 5 to 6. | Salt, water and electricity, with a 4 L brine tank. Formula 1: salt and water, about pH 7 to 8. Formula 2: salt and vinegar, about pH 6 to 7. Formula 3: salt, water and 37% hydrochloric acid, about pH 5 to 6. |
| Water hardness | Under 80 ppm recommended | Not listed | Feedwater and brine under 80 ppm |
| Power (store) | 110V/220V, 50/60 Hz | 120–240 VAC @ 1.7 A, 50/60 Hz via the included adapter. Also 12 V DC, max 8 A, solar compatible; approx. 120 W. | 110V/220V, 50/60 Hz |
| Power (label or manual) | Rating label: input AC100–240 V, 2.0 A, 50/60 Hz; output 12 V, 5 A (60 W max) | — | Manual: AC110/220 V, 50/60 Hz, 180 W |
| Size | 21 × 15 × 36 cm (8.3 × 5.8 × 14 in) | Unit: 22 × 22 × 41 cm (8.5 × 8.5 × 16 in). Packaged: 30.5 × 30.5 × 43 cm (12 × 12 × 17 in) | 26.2 cm W × 41.8 cm H × 17 cm L |
| Weight | 0.6 kg (1.3 lb) | Unit: not listed. Packaged: 6.6 kg (14.5 lb) | 11.8 kg (26 lb) operating weight |
| Mounting | Portable pitcher | Batch unit, no lid | Wall installation, with two mounting brackets for the system and brine tank. ⅜-in inlet, ½-in outlet. Installed by a qualified installer. |
| Cell | Not listed | Not listed | Patented cell; 316 stainless, single-stream, non-membrane |
| Made in | South Korea | United States | South Korea |
| Warranty | 1-year limited warranty for household use, from The HOCL Store. Commercial purchasers are excluded except as the law requires. | Issued by HypoSource LLC: assembly 5 years; electrical items and tanks 1 year; electrodes 2,000 hours or 5 years, prorated (year 1 full). | 1 year from HOCL LLC to the original purchaser, covering adapters, PCBs and electrolysis cells. Excludes plumbing, solenoids and pumps; no labor or freight. Warranty (PDF) |
| Price | $199.99 | $2,199.00 | $4,999.00 |
| Manual | Eco One manual (PDF) | Hypo 7.5 manual (PDF) | EWCO 300 manual (PDF) |
| Store | View the Eco One | View the Hypo 7.5 | View the EWCO 300 |
Store figures come first. The Eco One label and EWCO 300 manual figures are ratings, not measured power use.
Manufacturer-stated storage: keeps close to 90% of its strength for about 90 days in a closed, light-protected container at room temperature or cooler.
EWCO 300 flow table
The EWCO 300's output depends on its flow rate and on which additive goes in the brine.
| Flow rate | With salt (ppm) | With 37% hydrochloric acid (ppm) |
|---|---|---|
| 1.5 L/min | 200 | 300 |
| 2.0 L/min | 150 | 225 |
| 3.0 L/min | 100 | 150 |
| 4.0 L/min | 75 | 112 |
| 5.0 L/min | 60 | 90 |
| 6.0 L/min | 50 | 75 |
Formula 3 uses 37% hydrochloric acid, a strong acid. Handle it as the EWCO 300 manual directs. Poison Help: 1-800-222-1222.
Which one fits
Eco One and Hypo 7.5. For a small site, the Eco One makes a 1 liter batch. For a larger or busier site, the Hypo 7.5 makes a 7.5 liter batch. The Eco One's 1-year limited warranty covers household use only (see the warranty row above). This pairing fits:
Restaurants and food service · Animal care · Auto detailing · Childcare · Clinics · Farms · Greenhouses · Gyms · Janitorial · Offices · Schools · Senior living · Spas and salons
Hypo 7.5 and EWCO 300. For a smaller plant, store or venue, the Hypo 7.5 makes a 7.5 liter batch. For a full site that needs a steady supply, the EWCO 300 runs in continuous flow. This pairing fits:
Beverage and dairy · Cruise ships · Fish and seafood · Hotels · Meat processing · Poultry processing · Sports facilities · Supermarkets
The Hypo 7.5 is recommended on all 21 industry pages. See all industries
Manuals and store
Not sure which machine you need?
Tell us about your site and how much solution you use, and we'll help you pick. Email sales@ewco.com.