Digital particle counter A20-HF bCPC

condensationfor clean roomsUSB

Product summary
The A20‑HF bCPC is a high‑flow condensation particle counter designed for ultra‑clean environments and high‑frequency flux measurements. It delivers a 2.3 lpm sample flow to provide significantly more sample volume to the detector than a standard CPC. Available with n‑butanol or odorless, non‑flammable propylene glycol (PG) working fluid where butanol is restricted. Supports 1 Hz logging by default with options for 10 Hz or raw pulse output for Eddy Covariance applications, and emits zero instrument particles for cleanroom suitability.

Designed for

• Semiconductor and cleanroom contamination monitoring (ISO 14644)
• Eddy Covariance turbulent flux measurements on flux towers
• Applications with low particle concentrations where every count matters

Technology and variant highlights

• Extended condenser to enable particle growth at higher flow
• Larger nozzle to maintain consistent pulse widths across A20 variants
• PG (propylene glycol) variant for odorless, non‑flammable operation where butanol is restricted
• Zero instrument particle emission for cleanroom compatibility
• 10 Hz data logging and raw pulse output available for high‑frequency/flux applications

Features and benefits

• High sample flow: 2.3 lpm
• 7 nm cut‑off (4–10 nm available on request)
• Zero instrument particle emission
• Easy‑to‑use touchscreen
• 1 Hz default data logging; 10 Hz or raw pulse output options
• Cleanroom & semiconductor ready
• Eddy Covariance flux compatible

Notes
* Cut‑off is given as mobility‑equivalent diameter (silver particles). Custom calibrations (4–10 nm) available on request. A 10 nm option gives EN 16976:2024 compliance. ** The A20‑HF has a lower maximum concentration than some CEN/UF variants (100,000 #/cm³ vs 150,000 #/cm³) due to the higher flow through the optics.

Technical specifications

• Model: A20‑HF bCPC
• Particle size range: 7 nm – 2.5 μm *
• Cut‑off (Dp50%): 7 nm standard (4–10 nm available on request)
• Concentration range: 0 – 100,000 #/cm³ (single particle counting mode)
• Aerosol inlet/sample flow: 2.3 lpm (full flow through optics)
• Response time: t95 < 1.15 s
• False counts: < 0.001 #/cm³
• Working fluid: n‑Butanol (>99.5%) or Propylene Glycol (on request)
• Data logging: 1 Hz default; options for 10 Hz or raw pulse output via PNC analog out
• Sample conditions: Pressure 75–105 kPa; Dew Point < 15°C
• Environmental conditions: Temperature 15–35°C; Pressure 75–105 kPa; RH 0–95%
• Communication: Analog out (BNC, 0–10 V), Pulse out (BNC), RS‑232, Ethernet (RJ45), USB Type B
• Diagnostics: Flow rate, saturator/condensor/optics temperature, liquid level, nozzle pressure, critical orifice pressure, laser current, pulse quality
• Fittings: Inlet 1/4" SS tube; External vacuum 1/4" SS tube (built‑in pump on request)
• Software: Airmodus MultiLogger (Windows 10+)
• External vacuum requirement: 100–400 mbar at NTP (or <40% of inlet pressure)
• Power: External adaptor 100–240 VAC 50/60 Hz, max 160 W; steady state 100 W; output 12 VDC 11.5 A
• Dimensions & weight: 260 × 230 × 400 mm (H × W × D), 8.5 kg
• Shipping: Temperature 0–40°C; RH <95% non‑condensing; ship upright