The Yamato WE-200 is a benchtop Pure Line water purifier that delivers Type 1 (ASTM D1193) / A4 (JIS K0557) deionized water for high-sensitivity trace analysis. It combines a three-stage treatment train — reverse-osmosis membrane, ion-exchange resin, and final membrane filtration — to produce 0.5–1.0 L/min of ultrapure water directly at the bench. A digital LED display continuously reports conductivity, resistivity, and temperature, while an RO-membrane-based cartridge set extends consumable life and lowers running cost versus deionization-only designs.
Key Specifications
| Water quality | Type 1 (ASTM D1193) / A4 (JIS K0557) deionized water |
| Treatment method | RO membrane → ion exchange → filtration |
| Delivery rate | 0.5–1.0 L/min, continuous production |
| Pre-treatment | Activated charcoal + 0.1 µm hollow-fiber membrane cartridge |
| Ion-exchange | 2 L resin with activated charcoal (CPC-T cartridge) |
| Final filtration | 0.1 µm membrane filter |
| Raw water | Pressure 0.13–0.5 MPa; temperature 10–30 °C |
| Water quality display | 7-segment LED (conductivity / resistivity / temperature) |
| Safety devices | Leak cut-off solenoid, water-quality/controller/pressure/flow error and earth-leakage protection |
| Power | Single-phase 100–240 VAC, 50/60 Hz, ≤1.3 A |
| Dimensions / weight | W350 × D430 × H470 mm / ~30 kg |
| Origin | Made in Japan |
| List price | Contact for pricing |
Application Profile
Trace analysis is unforgiving about water: ICP-MS, HPLC, ion chromatography, and molecular biology all fail quietly when the water carries dissolved ions, organics, or silica. The Yamato WE-200 targets exactly that requirement by producing Type 1 / A4 water — the highest purity grade in both the ASTM and JIS standards — with measured conductivity around 0.055 µS/cm and silica and chloride at or below detection. Because it sits on the bench and taps a standard water faucet, it fits labs that need ultrapure water at the point of use without a large wall-mounted system.
The design choice that pays off over time is putting a reverse-osmosis membrane ahead of the ion-exchange resin. RO removes the bulk of the ionic and organic load first, so the downstream CPC-T resin cartridge is not consumed as quickly — the brochure's lifespan curves show the resin holding low TOC and high resistivity across thousands of liters. The result is lower cost per liter and fewer cartridge changes than a deionization-only unit. An electromagnetic valve at the sampling port guards against leaks, and the LED panel tracks consumable status so replacements are scheduled, not guessed.
Frequently Asked Questions
What water quality does the Yamato WE-200 produce? Type 1 water per ASTM D1193 and A4 per JIS K0557 — the top purity grade in each standard, suitable for high-sensitivity trace analysis.
How much water can it make? 0.5 to 1.0 L/min in continuous production, drawn directly at the bench-height sampling port (250 mm above floor, RC1/4 fitting with membrane filter).
How does the treatment train work? Raw water passes through pre-treatment (activated charcoal + 0.1 µm hollow fiber), then a reverse-osmosis membrane, then a 2 L ion-exchange resin cartridge (CPC-T), and finally a 0.1 µm membrane filter before delivery.
Which consumable is not included? The CPC-T ion-exchange resin cartridge is an operational accessory that must be purchased separately. The supplied kit includes hoses, pre-treatment cartridge, RO membrane cartridge set, membrane filter, power cord, and seal tape.
What are the raw-water requirements? Feed pressure of 0.13–0.5 MPa and temperature of 10–30 °C. The unit must be connected to a drainage facility (drain rate up to 2 L/min).
Does it need a special power supply? No — it uses a universal 100–240 VAC single-phase input at 50/60 Hz, drawing 1.3 A or less, so it runs on standard lab mains worldwide.
Ordering & Configuration
WE-200 pricing is quote-based. Add it to your quote and our team will confirm current price, the initial consumable set, and lead time, and can include the required CPC-T ion-exchange cartridge plus optional items (water sampling stand, foot switch, remote sampling terminal) in the same quote.
Warranty: Per Yamato standard terms.
Positioning: The Yamato WE-200 is a benchtop Type 1 / A4 ultrapure-water source for trace-analysis labs that want point-of-use purity with RO-extended consumable life. Budget the separately purchased CPC-T ion-exchange cartridge as an ongoing consumable, and plan a drain connection at install.
