OMEGA OS550

Core Technical & Performance Parameters

• Infrared Detection Wavelength: 8–14μm long-wave atmospheric transmission window (minimizes steam, dust measurement interference)
• Temperature Measurement Range: -40°C ~ +550°C full calibrated range
• Optical Distance-to-Spot Ratio (D:S): 30:1; 10mm diameter measurement spot at 300mm target distance
• Measurement Accuracy: ±0.75% full scale reading or ±1°C whichever greater
• Response Time Constant: 120ms fast response for dynamic moving target temperature tracking
• Emissivity Adjustment Range: 0.10–0.99 digital adjustable via on-board trim potentiometer
• Analog Output Signal: Isolated 4–20mA current output, corresponds linearly to full temperature range
• Power Supply: 12–24VDC loop-powered two-wire transmitter design
• Operating Temperature (Sensor Head): -20°C ~ +85°C; internal electronics temperature compensated
• Protection Class: IP65 stainless steel sensor probe housing
• Mechanical Dimension: Probe diameter 18mm, overall length 110mm; cable length standard 2m shielded cable
• Weight: 0.18kg sensor head assembly

Function & Feature Highlights

1. Non-contact measurement eliminates physical wear and damage to sensor from high-temperature, moving or corrosive target surfaces
2. 8–14μm long-wave infrared spectrum minimizes measurement error caused by water vapor, smoke and fine dust on production lines
3. Adjustable emissivity trim potentiometer compensates for different target material surface reflectivity (metal, plastic, ceramic, glass)
4. Full galvanic isolation 4–20mA two-wire loop output eliminates ground loop interference with industrial control systems
5. IP65 stainless steel probe housing withstands water washdown, oil mist and light chemical splash in food and chemical processing plants
6. Internal ambient temperature compensation circuit automatically corrects measurement drift caused by sensor head heating or cooling
7. Compact threaded mounting design (M18×1.5 male thread) compatible with standard industrial mounting brackets and protective air purge housings
8. No consumable components; solid-state infrared thermopile detector with long service life

Material & Structural Characteristics

• Sensor Probe Housing: 316L stainless steel seamless tube, corrosion resistant against mild acid, alkali and salt spray
• Optical Window: Hardened sapphire infrared transparent lens, scratch resistant, high thermal shock tolerance
• Internal Detector: Thermopile infrared sensing element based on Seebeck thermal voltage generation principle
• Cable Assembly: 2-core shielded twisted pair cable with PVC outer jacket, shield braid for EMI noise suppression
• Mounting Thread: M18×1.5 stainless steel male thread machined onto probe rear body
• Internal Circuit PCB: Conformal coated FR4 circuit board with high-temperature rated electronic components
• Optional Accessory: Stainless steel air purge collar to blow dust/debris off sapphire lens in dusty production environments

  Working Principle (Infrared Radiation Thermometry)

  1. All objects above absolute zero (-273.15°C) emit infrared thermal radiation proportional to surface temperature; OS550 sapphire lens focuses target infrared radiation onto internal thermopile detector
  2. Thermopile sensing element converts incoming infrared radiant energy into tiny proportional DC voltage signal via Seebeck thermoelectric effect
  3. On-board signal conditioning amplifier amplifies weak detector voltage, digital circuit compensates for ambient temperature fluctuation and user-set emissivity value
  4. Calibrated conversion circuit maps compensated thermal voltage value to linear 4–20mA standard current output signal
  5. Two-wire loop power transmits temperature signal to remote PLC, recorder or PID controller over long wiring distances without signal attenuation
  6. Built-in filtering circuit suppresses transient infrared interference from industrial arc flash, hot lamp and random thermal noise

  Installation Requirements

  1. Install via M18×1.5 male thread, matched with stainless steel mounting bracket; lock nut torque controlled at 1.0–1.2 N·m to avoid thread deformation
  2. Maintain clear unobstructed optical path between lens and measured target; dust, steam, oil mist directly covering sapphire lens causes severe measurement deviation
  3. Match D:S ratio strictly: ensure target physical size exceeds the calculated spot diameter at installation distance; partial target coverage leads to low temperature reading bias
  4. Two-wire shielded cable must separate from high-current AC power cables by minimum 15cm to block electromagnetic interference
  5. For high-dust/oil environments, equip air purge collar connected to clean dry compressed air (0.2–0.4MPa) to continuously clean lens surface
  6. Avoid direct radiant heat sources (furnace walls, hot pipes) irradiating sensor probe housing; install heat insulation baffle if ambient temperature exceeds 70°C

  Application Scenarios

  • Metal forging, casting and hot rolling non-contact surface temperature monitoring
  • Plastic extrusion, injection molding barrel and melt temperature measurement
  • Food baking tunnel, conveyor oven continuous product thermal detection
  • Glass manufacturing, ceramic kiln real-time temperature tracking
  • Automotive brake disc, engine part high-speed line thermal inspection
  • Chemical pipeline, reactor surface hazardous area temperature monitoring

  Operation & Maintenance Notes

  1. Adjust emissivity potentiometer strictly according to target material; polished metal surfaces require low emissivity (0.1–0.3), plastic/ceramic use 0.8–0.95
  2. Sapphire lens surface can only be wiped with lint-free microfiber cloth dipped in anhydrous alcohol; abrasive paper or rough cloth will scratch optical window permanently
  3. Do not bend shielded cable sharply at probe root; repeated bending fractures internal signal wires and causes intermittent signal loss
  4. Annual full calibration is recommended for precision production processes; send to OMEGA official calibration laboratory for traceable temperature correction
  5. Avoid long-term exposure of probe to continuous water spray without IP65 protective housing; water penetration damages internal thermopile detector
  6. If measurement reading drifts abnormally, first check lens contamination and air purge airflow before adjusting sensor parameters