HG-250

Generation

Maximum H₂ generation

250 ml/min

Continuous duty (70 % of max.)For continuous consumption, draw no more than 70 % of the model's maximum capacity.

175 ml/min

H₂ purityReached after the three-stage drying train.

up to 99.9995 %

Cell technology

PEM electrolysis of pure water

Hydrogen storage

None — only the volume held in the filters

By-product

O₂, vented

Pressure

Outlet pressure

Set on the keypad

Over-pressure cut-outAbove 90 PSI generation stops and the pressure over alarm is raised.

90 PSI

Feed water

Water quality

Deionised, < 0.5 µS/cm (> 2 MΩ·cm)

ElectrolyteAdding alkali destroys the membrane and voids the warranty.

None — never add KOH or NaOH

Tank level sensing

3 levels — low, medium, full

Water change

Empty, rinse and refill every 30 days

Drying train

Stages

Water trap + silica gel + 5 Å molecular sieve

1 · Water trap

Automatic liquid knock-out, solenoid drain — no service medium

2 · Silica gelRegenerate in an oven at 120 °C for 60–120 min.

Blue indicating gel; pink at 60 % saturation

3 · Molecular sieveRegenerate in an oven at 300 °C for 120–240 min.

5 Å, dark yellow; no colour change — service monthly

Control & interface

Display

4-line LCD, normal and set mode

Keypad

3 keys — ▲, ▼, F (pressure / overflow)

Status LEDs

Power, Generate, Alarm

Water-level LEDs

Full, Med, Low

Readings in set mode

Operating hours, water quality, total H₂ generated

AlarmsAlarm LED blinks, buzzer sounds every 10 s, message on LCD line 4.

Water empty, water over, pressure over, H₂ leak

Data interface

RS-232

Installation & supply

Mains supply

220 V AC, 50 Hz

Power / fuseRating as supplied for the HG-250. Confirm the supply rating for HG-500 and HG-1000 at order.

150 W · 5 A glass fuse

Rear connections

H₂ outlet, water drain, RS-232, cooling fan

Siting

Level bench, fan and rear panel clear, drain accessible

Service interval

Water change + tank clean every 30 days

Ordering

Order code

HG-250

Overflow control (HG-OFC)

Option — kit with three-port N₂ purge valve

Filter refill set (HG-FLT)

Silica gel and 5 Å molecular sieve