Pipe diameter (mm)
DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN150, DN200
Power supply
24 V DC ±10% or built-in battery type (battery life : approx.10 years at 20˚C)
Power consumption
24 V DC, 1.5 W or less
Applicable fluid
N₂ (diameter 25-80 mm)
Temperature and humidity of fluid
10°C to 60°C, RH 90% or less
Working pressure
Less than 1 MPa (gauge pressure)
Flow speed range min
DN25: Flow rate range ±0.6–35 m³/h; ±2.0% accuracy from ±3.5–35 m³/h, ±5.0% accuracy from ±0.6–3.5 m³/h
DN32: Flow rate range ±1.1–65 m³/h; ±2.0% accuracy from ±6.5–65 m³/h, ±5.0% accuracy from ±1.1–6.5 m³/h
DN40: Flow rate range ±1.3–80 m³/h; ±2.0% accuracy from ±8–80 m³/h, ±5.0% accuracy from ±1.3–8 m³/h
DN50: Flow rate range ±2.5–150 m³/h; ±2.0% accuracy from ±15–150 m³/h, ±5.0% accuracy from ±2.5–15 m³/h
DN65: Flow rate range ±4–240 m³/h; ±2.0% accuracy from ±24–240 m³/h, ±5.0% accuracy from ±4–24 m³/h
DN80: Flow rate range ±5–300 m³/h; ±2.0% accuracy from ±30–300 m³/h, ±5.0% accuracy from ±5–30 m³/h
DN100: Flow rate range ±10–500 m³/h; ±2.0% accuracy from ±50–500 m³/h, ±5.0% accuracy from ±10–50 m³/h
DN150: Flow rate range ±24–1200 m³/h; ±2.0% accuracy from ±120–1200 m³/h, ±5.0% accuracy from ±24–120 m³/h
DN200: Flow rate range ±40–2000 m³/h; ±2.0% accuracy from ±200–2000 m³/h, ±5.0% accuracy from ±40–200 m³/h
Air flow rate conversion accuracy
FWD025-080: ±2.5% of measurement (at 500 kPa, 25°C, dry air)
FWD100-200: ±2.0% of measurement (at ≥ 300 kPa)
Display
1st line: Totalized value (m3) 8-digit, Instantaneous flow (l/mm) 8-digit
2nd line: Instantaneous flow (Nm3/h) 5-digit (4-digit after 2000), Pressure (kPa) 5-digit, Temperature (°C) 3-digit
Outputs (not available with battery supply)
Current output: 4-20 mA DCC (±0.5% PE), max. load resistance. 400Ω, max. current output 22 mA
Instantaneous flow, pressure or temperature
Contact output: 2 contact outputs, max. load 24 V DC, 50 mA, max. frequency: 10 Hz
Output 1: pulses (forward)
Output 2: pulses (reverse), high/low alarm, system error
Process connection type
⌀25, ⌀32 mm: ⌀25 mm – Rc1, ⌀32 mm – Rc1-1/4
⌀40-⌀80 mm: Flange mounting (JIS10K)
⌀100-⌀200 mm: Flange mounting JIS10K
Mounting conditions (straight lengths)
⌀25, ⌀32 mm: 20D or more upstream, 5D or more downstream
When used for bidirectional measurement, 20D or more downstream and upstream
⌀40-⌀200 mm: 10D or more upstream, 5D or more downstream
When used for bidirectional measurement, 10D or more downstream and upstream
Materials of wetted parts
Aluminum alloy, PPS, fluorosilicone rubber, etc.
Installation location
Indoor or outdoor (IP64 equivalent)
Storage temperature
-20°C to 70°C, non-condensing
