PSC FIDELIS Series
Compact Infrared Temperature Sensors (F309 / F318 / F323)
The FIDELIS Series from Process Sensors (a KPM brand) combines digital signal processing with a robust stainless steel housing to deliver reliable, non-contact temperature measurement across a wide range of industrial processes. Its digital microcontroller ensures 100% reproducibility of measured values through continuous ambient temperature compensation, so the device can be quickly readjusted if deviations arise over years of use.
Available in three models — F309, F318, and F323 — the series covers temperature ranges from 50°C up to 1800°C, with shortwave spectral responses that minimize errors caused by changes in emissivity. A clearly visible green laser sighting light makes aiming easy even on red-hot surfaces. Each unit supports both switchable 0/4-20 mA and RS485 output, small spot sizes down to 1 mm, sub-1.5 ms response time, and can be daisy-chained with up to 32 pyrometers on one network.
FIDELIS pyrometers are rated IP65 and designed to operate in ambient temperatures of 7°C to 70°C, making them well suited to induction heating, steel and metals processing, semiconductor wafer manufacturing, kilns, cement and lime production, vacuum furnaces, welding/brazing, ceramics, additive manufacturing, composites, sintering, molten glass, and R&D applications.
The included SensorTools software provides full device configuration, live graphical/numerical temperature display, data recording, and comparison of up to 16 measurement files at once — plus CSV export and settings transfer between devices.
FIDELIS Series Pyrometers – Technical Specifications
| Spec | F309 | F318 | F323 |
|---|---|---|---|
| Temperature Range | 550–1400°C (1022–2552°F) / 650–1800°C (1202–3272°F) | 100–700°C (212–1292°F) / 150–900°C (302–1652°F) | 50–600°C (122–1112°F) |
| Temperature Sub Ranges | Any sub-range within the full range (minimum span 50°C / 122°F) | ||
| Spectral Range | 0.7–1.1 µm | 1.65–2.1 µm | 2.0–2.6 µm |
| Detector | Silicon | InGaAs | InGaAs |
| Response Time (t90) | <1.5 ms (with dynamical adaptation at low signal levels), adjustable up to 10s | ||
| Accuracy (ε = 1, t90 = 1s, TA = 23°C) | Full-scale ≤1400°C: 0.3% of reading in °C + 1K Full-scale >1400°C: 0.5% of reading in °C + 1K |
Full-scale ≤1400°C: 0.3% of reading in °C + 1K Full-scale >1400°C: 0.5% of reading in °C + 1K |
70–100°C: 3° >100°C: 0.5% of reading in °C+1K (min. 2°C) |
| Repeatability (ε = 1, t90 = 1s, TA = 23°C) | 0.1% of reading in °C + 1K | 0.2% of reading in °C + 1K (min. 1.6°C) | 0.2% of reading in °C + 1K (min. 1.6°C) |
| Analog Output | 0 or 4–20 mA, max load 500Ω, resolution 0.0015% of the adjusted temperature (sub)range (16-bit); output settable within temperature range | ||
| Serial Interface | RS485 (4.8–921.6 kBd), resolution 0.1°C / °F | ||
| Inputs/Outputs |
2 digital input/outputs, each configurable as input or output:
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| Device Parameters | Temperature sub range, response time (<1.5 ms–10s), emissivity (0.050–1.200), transmittance (5–100%), peak picker (automatic / time clear / external via digital input), device address (00–97), baud rate (4.8–921.6 kBd), analog output (0 or 4–20 mA), temperature unit (°C / °F) | ||
| Power Requirement | 24V DC (18–30V DC), max., protected against reverse polarity | ||
| Isolation | No galvanic separation | ||
| Sighting | Laser targeting light, green, λ=515 nm, P<1 mW, laser class 2 per IEC 60825-1 | ||
| Ambient Temperature | 7°C to 70°C (45°F to 158°F) | ||
| Storage Temperature | -20°C to 85°C (-4°F to 185°F) | ||
| Relative Humidity | Non-condensing conditions | ||
| Housing / Protection Class | Stainless steel / IP65 (with female connector) | ||
| Weight | Approx. 500g (1.1 lbs) | ||
| CE-Symbol | According to EU regulations (EN 50 011) | ||
| Dimensions | Ø30mm head / Ø25mm body, 227mm overall length (194mm to connector), M25x1.5 threads | ||
Optics Data – Spot Size Diameter by Distance
| Lens Type | OF09-A0 | OF09-B0 | OF09-C0 | OF09-D0 |
|---|---|---|---|---|
| Models & Temperature Ranges | F309 All temp ranges |
F318 100–700°C (212–1292°F) |
F318 150–900°C (302–1652°F) |
F323 50–600°C (122–1112°F) |
| Spot Size Diameter M [mm] @ 200mm | 1 | 1.7 | 1 | 3.2 |
| Spot Size Diameter M [mm] @ 500mm | 2.4 | 4.8 | 2.6 | 9.1 |
| Spot Size Diameter M [mm] @ 1000mm | 5 | 10 | 5.5 | 19 |
| Spot Size Diameter M [mm] @ 3000mm | 15.6 | 30.5 | 16.8 | 58.5 |
| Aperture D | 13 mm | |||
Note: M refers to 90% of the acquired thermal radiation.
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