ST104A Horizontal Ionizing Air Blower
A horizontal blower covering 60 × 120 cm — roughly double the area of the desktop unit — at 70 to 120 CFM. Mounted above and pushing air across rather than down, it suits a two-operator bench, a packing station, or the open side of a conveyor where a bar cannot be fitted.
- Air coverage
- 60 × 120 cm
- Airflow
- 70–120 CFM, adjustable
- Ion balance
- 0 V ±10 V
- Size / weight
- 400 × 220 × 190 mm · 5.8 kg
- Supply
- 110 V/60 Hz or 220 V/50 Hz
Roughly double the coverage of the ST101A. For a full production line, the ST1200 covers 140 × 120 cm.
What the ST104A Fixes
If any of these is happening at your workstation, the cause is usually a surface charge nobody is measuring.
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One bench blower does not cover the bench
A desktop unit covers 40 × 60 cm. Where two operators work side by side, or the work area is wider than one position, the coverage runs out before the bench does.
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There is no room to mount a bar
A bar has to sit within a metre of the material. Where the geometry does not allow it, a horizontal blower reaches the area from above and to the side.
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Charge returns between stations
Material recharges as it separates from a surface. Covering the handling area, not just one point, is what stops it coming back.
How It Works
Corona discharge at the emitter points produces positive and negative ions, and the fan pushes them horizontally across the work area rather than down onto it. Airflow adjusts from 70 to 120 CFM, and ion balance is held at 0 V ±10 V. The high-voltage generator is built in, and a real-time ion-balance monitoring and alarm system can be fitted on request.
The process is self-limiting: once a surface reaches neutral it stops taking up ions. What decides whether it works in practice is whether the airflow actually reaches the charged surface — which is why coverage area, not ion output, is the figure to size a blower on. Verify the result with a static field meter rather than assuming it.
Specifications
| Model | ST104A |
| Operating voltage | 110 V / 60 Hz or 220 V / 50 Hz |
| Power | 16 W to 34 W |
| High-voltage generator | Built in |
| Air volume | 70–120 CFM, adjustable |
| Air coverage | 60 cm × 120 cm |
| Ion balance | 0 V ±10 V |
| Ion balance monitoring | Optional real-time monitoring and alarm system |
| Operating temperature | −10 °C to 50 °C |
| Dimensions | 400 mm (L) × 220 mm (W) × 190 mm (H) |
| Weight | 5.8 kg |
Decay Time — Measured
Measured decay times at three positions across the 120 cm width. The centre of the airflow is fastest and the edges lag slightly — about 0.2 seconds at 300 mm, which is what you would expect from a horizontal blower and is why coverage is quoted as an area rather than a distance.
| Position | 300 mm | 600 mm | 900 mm | 1200 mm |
|---|---|---|---|---|
| Left, 300 mm off centre | 1.3 s | 2.5 s | 3.9 s | 6.6 s |
| Centre | 1.1 s | 2.2 s | 3.6 s | 6.5 s |
| Right, 300 mm off centre | 1.2 s | 2.3 s | 3.8 s | 6.3 s |
Charge decay measured from 1 kV to 100 V, unit running on 110/220 V, ambient 22 °C and 75 %RH.
The spread between centre and edge stays under about 0.2 seconds out to 900 mm, so the whole 60 × 120 cm area clears within a comparable time rather than the centre clearing first and the edges lagging.
Not sure the ST104A is the right size? Send the area you need to cover, what the material is and the measured surface voltage — we will come back with a model and a mounting position.
Where It Goes
A blower neutralizes an area rather than a line. These are the positions the ST104A is sized for.
Two-operator benches
Where a single desktop unit runs out of coverage before the bench does.
SMT and PCB handling
Board loading, inspection and packing stations where components are exposed and static-sensitive.
The open side of a conveyor
Where a bar cannot be mounted close enough, a horizontal blower reaches the material from the side.
Bar or Blower, and Which Blower
Use an ionizing bar when the material moves past a fixed point — off a roller, out of a tool, off a stack. A bar mounted at that point neutralizes faster and holds a tighter balance, and is cut to the exact width of the material. Use a blower when the charge sits on a fixed area, or when there is no way to mount a bar within its 1 m working range.
Between the blowers it is a question of area: ST-S200 450 × 450 mm to build into a machine, ST101A 40 × 60 cm for one position, ST104A 60 × 120 cm for a wider bench, and ST1200 140 × 120 cm across a full line.
Frequently Asked Questions
What area does the ST104A cover?
60 × 120 cm — roughly double the coverage of the desktop ST101A.
How much airflow does it deliver?
70 to 120 CFM, adjustable.
What ion balance does it hold?
0 V ±10 V.
How is it mounted?
It is a horizontal unit, 400 × 220 × 190 mm and 5.8 kg, mounted above the work area and pushing air across it rather than down onto it.
What power supply does it need?
110 V / 60 Hz or 220 V / 50 Hz, drawing 16 to 34 W depending on the fan setting.
Can it replace an ionizing bar?
Not on a moving web — a bar mounted at the point where the material separates from a roller will always be faster and tighter. A blower is the answer where a bar cannot physically be fitted, or where the charge sits on a static area rather than a line.
ST101A, ST104A or ST1200?
The ST101A covers 40 × 60 cm for one position, the ST104A 60 × 120 cm for a wider bench or two operators, and the ST1200 140 × 120 cm across a full line.
How fast does the ST104A neutralize?
At the centre of the airflow, 1 kV falls to 100 V in about 1.1 seconds at 300 mm, 2.2 seconds at 600 mm, 3.6 seconds at 900 mm and 6.5 seconds at 1200 mm, tested at 22 °C and 75 %RH. Three hundred millimetres off centre in either direction the figures are within about 0.2 seconds of the centre.
Request a quote for the ST104A Give us the area to cover, the material and the measured surface voltage.
Related Products
New to ionization? What is an ionizing bar covers how corona discharge neutralizes a charged surface, and ionizing bar voltage output explains the kV figure. To compare the whole range, see all industrial static eliminators and ionizing bars.