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Industrial Non-Contact Infrared Thermometer/Transmitter with Local Display, Dual Alarm and Analog Output


Item# OS551A-MA-5

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $617.49
5-9 $586.62
10-24 $574.27
25-49 $549.57
50-99 $537.22
100+ $524.87
Industrial Non-Contact Infrared Thermometer/Transmitter with Local Display, Dual Alarm and Analog Output OS551A-MA-5 OS551A-MA-5
  • Visual and Audible High and Low Alarms with Red LED Indication (OS551A has High Alarm only)
  • Voltage Alarm Outputs to Drive External Relays
  • Fast 100 msec Response Time
  • Two-Way RS232 Communication Available
  • Aluminum Case NEMA 4 Available
  • Wireless RS232 Communication Available
  • Accuracy ±1% of Reading
  • Models with Temperature Ranges Measuring Up to 1370°C (2500°F)
  • Current, Voltage, or Millivolt Output
  • Laser Sight Optional
  • °C/°F Keypad Selectable
  • Local Backlit LCD Display Standard
  • Dual Display Indicates Current plus Min, Max, Average, or Differential Temperatures on All Models
  • Emissivity Adjustable from 0.1 to 1.00 in 0.01 Steps via the Programmable Keypad
  • The Sensor Head the Electronic Box are a matched set

OS551A-MA-5 Model Options

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Process Temprature Range
Field of View
Communication Protocol
Accuracy @ Ambient
Operating Temprature range
Laser Output
Built in Display
Cable Length
Supply Voltage
Spectral Response
Response Time
Intrisically Safe

OMEGA's OS550A Series (Upgrade from OS550 Series) industrial, high performance, economical thermometer/transmitter offers a wide choice of temperature ranges, optical fields of view and 3 analog outputs (1 mV/degree, 4 to 20 mA, and 0 to 5 Vdc) to feed directly into panel meters, recorders, temperature/process controllers, data loggers, data acquisition systems, or other process instrumentation.

Since the OS550A Series infrared thermometers do not use chopper motors or vibrator mechanisms, they can be mounted in any position and in hostile environments without suffering any loss in performance.

Accuracy: ±1% of reading @ 25°C ambient or 1.7°C (3°F), whichever is greater
Repeatability: ±1% rdg ±1 digit
Spectral Response: 8 to 14 microns
Emissivity Range: 0.10 to 1.00
Field of View (FOV): See diagrams
Display: Backlit LCD
Transmitter Outputs: 1 mV/degree, 0 to 5 Vdc or 4 to 20 mA
Power: 8 to 24 Vdc @ 80 mA
Environmental Ratings: NEMA 4 (IP65) water-tight and dust-tight for sensing head and electronics enclosure
Ambient Operating Range: Sensing head 0 to 50°C (32 to 122°F) with OS550-WC; 0 to 85°C(32 to 185°F)
Response Time: 100 msec; 0 to 63.2% final value
Alarms: Visual and audible
Alarm Output: Voltage, 100 mA drive
RS232: Standard on OS552A, OS553A and OS554A models; two-way communication; PC compatible software included
Connection: 4.5 m (15') sensor head and power/output cables included
    Sensing Head: 10.9 x 4.1 cm(4.30 x 1.63'), 11.2 to 20 thread
    Electronics: 12 x 80 x 50.8 cm(4.75 x 3.15 x 2')
    Sensing Head: 0.45 kg (12 oz)
    0S550A Electronics Mounted in NEMA 4 (IP65) Enclosure: 1.2 kg (43.2 oz)
Max Laser Power Output: < 1 mW Class II laser product

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OS551A-MA-5....is there an equivalent that can be used instead of this unit...? Pls advise.....also is it still available for ordering...?

Asked by: Bob53
The OS550A series is no longer sold and the OSAO-Series is a good product to review as an alternative.
Answered by: Applications Engineer ANB
Date published: 2021-06-03
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