Technical Specifications (typical OS550A family):
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Temperature Ranges (model dependent):
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OS551A: –30 to +400°C (–20 to +752°F)
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OS552A: –30 to +538°C (–20 to +1000°F)
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OS553A: –30 to +871°C (–20 to +1600°F)
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OS554A: –30 to +1370°C (–20 to +2500°F)
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Accuracy: ±1% of reading or ±1.7°C (3°F), whichever is greater @ 25°C ambient, ε=0.95
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Repeatability: ±(1% of reading + 1 digit)
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Spectral Response: 8–14 µm (silicon/pyroelectric detector, atmospheric window)
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Emissivity Adjustment: 0.10 to 1.00 in 0.01 increments
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Response Time: 100 ms (63.2% of final value)
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Optical Resolution (Spot Size): Various FOV lenses available; e.g. 25.4 mm spot @ 1524 mm distance (D:S ratios from 2:1 to 60:1 depending on optic code)
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Display: Backlit dual LCD showing current temperature, MAX/MIN/AVG/ΔT
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Analog Outputs: Simultaneous 4–20 mA (loop-powered or isolated), 0–5 VDC, and 1 mV/°C (degree)
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Alarm Outputs: 2× open-collector or voltage outputs (Hi/Lo); red LED + audible buzzer on alarm
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Serial Interface (on -A models): RS-232 bidirectional with Windows logging software
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Laser Sighting: Class 2 visible red laser (<1 mW @ 650 nm) for aiming (removable after alignment)
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Supply Voltage: 8–24 VDC @ 80 mA typical (for sensor head)
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Operating Temperature (Electronics): 0 to +50°C (32 to 122°F); with water-cooling jacket up to +85°C
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Ambient Humidity: 10–90% RH non-condensing
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Enclosure Rating: NEMA 4 / IP65 (sensor head and electronics case)
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Sensor Head Dimensions: Ø41 × 109 mm (1.63″ × 4.3″)
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Cable Length: 4.5 m (15 ft) standard sensor-to-electronics cable
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Weight: Sensor head 0.45 kg; complete kit ~1.2 kg
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Material: Anodized aluminum sensor housing; polycarbonate/ABS electronics case (or optional aluminum case)
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Certifications: CE, FCC
Features:
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Chopper-less design → can be mounted in any orientation without performance shift
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Emissivity table lookup or manual entry
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Peak hold / valley hold modes for transient temperature capture
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PC software for datalogging and configuration
Applications:
Roller/conveyor belt temperature in plastics & rubber, furnace wall monitoring, transformer busbar hot-spot detection, food processing belts, glass tempering ovens, paper mill dryer cans.
Installation & Precautions:
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Ensure target fills at least the minimum spot size; if target is smaller, accuracy degrades
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Clean lens periodically with compressed air or soft lens tissue — NEVER touch germanium/glass lens with fingers
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Shield from steam, dust, or high-energy RF; use air purge collar if needed
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Verify emissivity of material at measurement wavelength (8–14 µm) — polished metals need very low ε or 2-color pyrometer
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