The Furness Controls FCO452 is the industrial version of the 400 Series low differential pressure transmitters. Models range from ±50 Pa—accurate to 0.25% of reading—up to −1 to +10 bar, with an absolute pressure version of 1500 mbar also available. Its robust IP66-rated aluminum housing provides the necessary protection in wet or dirty environments and is available with various pneumatic connections and a process manifold option with stainless steel media contacts for isolation valves and aggressive gases. Features include temperature correction, configurable units, and adjustable output damping. Its microcontroller can apply the square root function to provide direct velocity or flow readings with Pitot tubes and laminar flow elements.
| Models / ranges | Model 1: ±50 Pa Model 2: ±150 Pa Model 3: ±500 Pa Model 4: ±2500 Pa Model 5: ±10 kPa Model 6: ±20 kPa Model 7: ±30 kPa Model 8: ±1 bar Model 9: −1 … +2 bar Model 10: −1 … +6 bar Model 11: −1 … +10 bar Model 12: 0 … +1500 mbar abs |
| Exit options | 2-wire 4–20 mA (models 1 to 7 only) 4-wire isolated 4–20 mA (models 1 to 7 only) 4-wire, single-pole isolated voltage: 0–1 V DC to 0–10 V DC full scale 4-wire, double-pole isolated voltage: ±1 V DC to ±10 V DC full scale |
| Screen options | Low-power LCD, high-brightness blue OLED (requires local 24V DC power supply) |
| Keyboard | Membrane keypad for easy field configuration |
| Adjustable damping | 0.0 … 60.0 seconds |
| Measurement functions | Linear, square root, custom linearization, and selectable engineering units |
| Trigger level relays | Optional: 2 relays of 2 A at 55 V AC / 30 V DC |
| Zero control | Optional: automatic or remote |
| Pneumatic ports | Spigots with locknuts for 6 mm OD x 4 mm ID flexible tubing. Options: 4 mm OD x 3 mm ID tubing, 1/8″ BSPF or 1/4″ BSPF. Optional: process manifold with 54 mm centers |
| Communications | Internal Micro-USB for instrument configuration (free software) |
| Accuracy at 20 °C | From 10% to 100% of range: < ± (0.25% of reading + 1 digit) From 0% to 10% of range: < ± (0.025% of range + 1 digit) |
| Span adjustment | From 10% to 100% of range (configurable at any point in the instrument’s range; for spans < 20% of range, accuracy is reduced to < ± (0.05% of range + 1 digit)) |
| Long-term drift | Typically 0.2% per year |
| Temperature coefficients | Zero: < 0.02 %/°C Range: < 0.02 %/°C |
| Operating temperature | −10 … +60 °C |
| Output resolution | 0.3 µA for 4–20 mA output 0.1 mV for 0–1 V, ±1 V, 0–2 V, ±2 V outputs 0.35 mV for 0–5 V, ±5 V, 0–10 V, ±10 V outputs |
| Overload | Models 1 to 7: 20x DP range Models 8 to 12: 1.5x range |
| Static pressure | Models 1 to 7: −1 … +10 bar gauge. Models 8 to 12: Do not exceed the instrument range. |
| Minimum response time | 100 ms |
| Output update | 50 ms |
| Feeding | 2-wire 4–20 mA: 9 … 40 V DC, 22 mA 4-wire isolated: 24 V DC ±10%, 30 mA With relays, OLED display or auto-zero: 24 V DC ±10%, 100 mA |
| Casing | Painted aluminum with IP66 protection rating |
| Dimensions | 163 × 128 × 92 mm (W × H × D) |
| Materials in contact with the environment | Standard: copper, brass, nickel, mica and PVC. Version with process manifold: stainless steel, mica and PTFE. |
| Media compatibility | Air and non-corrosive gases, max. humidity 95% non-condensing |
| Weight | 1 kg |
