
High Temperature Industrial 
Shahin Baghai 
X7896
5/22/03 
L-1615 SqLabelColorComp.eps
200%
For Reference Only
ACTUAL SIZE
Bleed
Bleed
LASER RADIATION - DO NOT STARE INTO BEAM
LASER RADIATION DO NOT STARE  
INTO BEAM OR VIEW DIRECTLY WITH  
OPTICAL INSTRUMENTS. CLASS 2  
LASER PRODUCT.
MAX. OUTPUT  1mW, WAVELENGTH 630-670 nm, CLASS II (2) 
LASER PRODUCT. COMPLIES WITH FDA 21CFR 1040.10
®
CAUTION
AVOID EXPOSURE. LASER 
RADIATION IS EMITTED  
FROM THIS APERTURE
TYPE AND RULES PRINT BLACK 100%
BACKGROUND YELLOW 100% 
Infrared Thermometer
Non-Contact Temperature Measurement 
with Integral Display and Analog Output
OS555A Series
††
Optional
U 
Measure from 538 to 
2482°C (1000 to 4500°F)
U 
See Thru Glass Window 
Applications
U 
1% Rdg Accuracy
U 
110:1 Field of View
U 
Voltage/Current  
Analog Output
Make it Wireless 
with Optional RS232 
to USB Wireless 
Transceiver!
Available Accessories
OS555A sensor 
head (included) 
shown with 
OS550-MN 
mounting nut.
OS550-WC air/water 
cooling jacket.
optional, mounting 
bracket and 
mounting nut.
OS550-MB 
mounting 
OS550-AP air 
purge collar,
bracket.
U 
Fast 100 ms  
Response Time
U 
Backlit LCD
U 
Adjustable Emissivity
U 
High/Low Alarms
U 
Data Storage and Logging
U 
RS232 CommunicationsFree PC Data Logging 
Software Included
U 
Available with NEMA 4 
(IP65) Plastic or Aluminum 
Housing, or with No Case 
for OEM Applications
OMEGACARESM extended warranty program 
is available for models shown on this page. 
Ask your sales representative for full details 
when placing an order. OMEGACARESM 
covers parts, labor and equivalent loaners.
Extended Warranty
Program
SM
shown smaller than actual size.
OS555A-V1 
The OMEGA® OS555A Series 
industrial high performance 
thermometer/ 
temperature 
(1000 to 4500ºF),
transmitters offer a high 
range of 538 to 2482ºC 
 110 to 1 optical 
field of view, any voltage or current 
analog output to feed directly to panel 
meters, recorders, temperature/ 
process controllers, data loggers, 
and data acquisition systems. It also 
offers adjustable emissivity, high 
and low alarm outputs, PC serial 
interface, temperature data logging in 
real-time, and fast response time of 
100 msec.
These ruggedly designed units 
are ideal for high temperature 
measurement and see through 
glass window applications.
LASER RADIATION DO NOT STARE 
INTO BEAM OR VIEW DIRECTLY WITH 
OPTICAL INSTRUMENTS. CLASS 2 
LASER PRODUCT.
LASER RADIATION - DO NOT STARE INTO BEAM
MAX. OUTPUT  1mW, WAVELENGTH 630-670 nm, CLASS II (2) 
LASER PRODUCT. COMPLIES WITH FDA 21CFR 1040.10
AVOID EXPOSURE. LASER 
CAUTION
RADIATION IS EMITTED 
FROM THIS APERTURE
®
J-77
OS550-MF  
mounting flange.
Specifications
General
Range: 538 to 2482°C (1000 to 4500°F) 
Accuracy: ±1% rdg to 1093°C (2000°F); 
±2% rdg for higher temperatures; 25°C 
ambient, 0.95 emissivity
Repeatability: ±(1% rdg + 1 digit) 
Spectral Response: 2 to 2.5 microns 
Emissivity: 0.10 to 1.00 in 0.01 steps 
Field of View: 110 to 1 
Response Time: 100 ms, 0 to 63.5% of 
final value
Display: Backlit LCD 
Analog Output: 1 mV/degree, 
0 to 5 Vdc or 4 to 20 mA 
Alarms: High and low; red LED and 
audible indicators; two 100 mA current 
drives for external relays
Power: 8 to 24 Vdc, 80 mA 
PC Interface: RS232, 2-way
††
 Refer to Accessories on next page for 
NIST calibration ordering information.

DISTANCE: SENSOR TO OBJECT (FT)
0'  16'  82' 50' 
Model OS555A
Model OS524E
0.5" @ 0
SPOT DIA.* (INCH)
SPOT DIA.* (MM) 
1.5"
0.5"
38
13 mm @ 0
*SPOT DIAMETER MEASURED 
A T 90% ENERGY 
0 
5  15 
DISTANCE: SENSOR TO OBJECT (M) 
5.1"
D:S  = 1 10:1 
130
8.7"
221
25 
Environmental
Rating: NEMA 4 (IP65); sensor 
head and plastic or aluminum 
electronics enclosure
Operating Ambient: 0 to 50°C (32 to 
122°F) electronics and standard sensing 
head; 85°C (185°F) max temp for 
sensing head with water cooled jacket
Physical Dimensions: 
 Sensing Head: 109 L x 41 mm OD 
 (4.3 x 1.63”); 1.5-20 thread 
Electronics, Plastic Case:  
120 H x 80 W x 51 mm L  
(4.75 x 3.15 x 2”) 
Electronics, Aluminum Case:  
115 H x 90 W x 56 mm L  
(4.5 x 3.5 x 2.2”)
Connections: 4.5 m (15’) sensor head 
and power/output cables included
Weight: 0.45 kg (12 oz) sensing head; 
1.2 kg (42.3 oz) plastic case
Laser Sighting
Wavelength: 650 nm, red 
Operating Distance: Up to 12 m (40’) 
Max Laser Power Output: 
Less than 1 mW 
Classification: FDA Class II Laser 
product; European Class 2
Beam Diameter: 5 mm 
Operating Ambient: 0 to 50°C 
(32 to 122°F)
OS555A-V1-BB (OEM version) 
shown smaller than actual size.
Make it Wireless 
with Optional 
RS232 to Wireless 
Transceiver!
WUSB wireless 
receiver.
OS555AM-V1, infrared 
industrial thermometer 
WRS232-USB 
wireless transceiver 
sold separately.
with 0 to 5 Vdc analog 
output aluminum 
enclosure.
 To Order Visit omega.com/os555a for Pricing and Details
 Model No.  Electronics Enclosure 
 OS555A-(*)  Plastic, NEMA 4 (IP65) 
 OS555AM-(*)  Aluminum, NEMA 4 (IP65) 
 OS555A-(*)-BB  No enclosure, for OEM applications
Comes complete with operator’s manual. 
 Specify analog output signal: “MA” for 4 to 20 mA, “ V1” for 0 to 5 Vdc or “MV” for 
*
1 mV/degree. 
To order with longer sensor head cable, up to 15 m (50"), add suffix “-(†)FT” to model number, 
and add additional cost for each additional foot over 15". † Specify length in feet. 
Ordering Examples: OS555A-V1, infrared thermometer with 538 to 2482°C (1000 to 4500°F) 
range, 110 to 1 field of view, 0 to 5 Vdc output. 
OCW-3, OMEGACARE
Accessories 
 Model No.  Description
 OS550-AP  Air purge collar 
 OS550-WC  Air/water cool jacket 
 OS550-MF  Mounting flange 
 OS550-MB  Right angle mounting bracket 
 OS550-MN  Mounting nut 
 OS550-LS  Laser sighting** 
 CAL-3-IR-X††  NIST calibration certification 
 PSR-24S   Regulated 24 Vdc @ 400 mA supply, 
 PSR-24L   Regulated 24 Vdc @ 400 mA supply, 
 WRS232-USB  Wireless RS232 transceiver kit 
 TX8-100  Power/output extension cable, 30 m (100') 
 OM-CONV-USB  RS232 to USB interface converter 
 OS550A-PCAB-15  Power/output cable connector, 4.5 m (15') 
 OS550A-PCAB-100  Power/output cable connector, 30 m (100')
** One unit suitable for aligning many sensor heads.
SM 
extends standard 2-year warranty to a total of 5 years.
90 to 264 Vac input, screw terminal
90 to 264 Vac input, stripped leads
J
J-78