
Calibrator/Thermometer
CL3515R
Standard
U USB and RS232 Interface 
with Windows® Software
U 11 Types of Thermocouples
K, J, T, E, R, S, N, L, U, B,  
and C (in °C, °F, or K),  
and mV Signal Output
U  NIST-Traceable  
Calibration Certificate with  
7 Data Points (Included)
U 2 Channels for 
Thermocouple Temperature 
Measurement (T1 and T2)  
with Offset Adjustment
U Ergonomic Rotary Knob 
Allows for 
Operation
The CL3515R is a portable 
calibrator/thermometer with a 4-digit 
LCD. It is designed to use external 
Type K/J/T/E/R/S/N/L/U/B/C  
thermocouples as temperature 
sensors. OMEGA offers a complete 
selection of thermocouples, or 
we can custom-design parts to 
meet your specifications. The 
thermometer features a dual 
thermocouple input and an 
adjustable thermocouple offset. The 
thermocouple types comply with the 
NIST monograph 175, revised to 
ITS-90 standards.
Specifications
Thermocouple (Resolution) 
Measurement Range*:
 K: (0.1°) -200 to 1372°C  
 (-328 to 2501°F) 
 J: (0.1°) -210 to 1200°C  
 (-346 to 2192°F) 
 T: (0.1°) -250 to 400°C  
 (-418 to 752°F) 
 E: (0.1°) -250 to 1000°C  
 (-418 to 1832°F) 
 R: (1°) 0 to 1767°C  
 (32 to 3212°F) 
 S: (1°) 0 to 1767°C 
 (32 to 3212°F) 
 N: (0.1°) -200 to 1300°C  
 (-328 to 2372°F) 
 L: (0.1°) -200 to 900°C  
 (-328 to 1652°F) 
 U: (0.1°) -200 to 600°C  
 (-328 to 1112°F) 
 B: (1°) 600 to 1820°C  
 (1112 to 3308°F) 
 C: (1°) 0 to 2316°C  
 (32 to 4200°F)
 According to temperature standard ITS-90.
*
One-Handed 
CL3515R shown with 
2 Type K thermocouples 
Accuracy:
 Thermocouple Types K/J/T/E/L/U: 
±(0.05% rdg + 0.5°C) -50 to 1372°C 
[±(0.05% rdg + 1.0°F) -58 to 2501°F]
 ±(0.05% rdg + 1.0°C) -50 to -250°C
[±(0.05% rdg + 2.0°F) -58 to -346°F]
 Thermocouple Type N: 
: 
±(0.05% rdg + 1.0°C) -50 to 0°C 
 [±(0.05% rdg + 2.0°F) -58 to 32°F] 
 ±(0.05% rdg + 0.5°C) 0 to 1300°C 
 [±(0.05% rdg + 1.0°F) 32 to 2372°F]
 Thermocouple Types R/S/B/C: 
±(0.05% rdg + 2°C) 0 to 1767°C 
 [±(0.05% rdg + 4°F) 32 to 3212°F]
Thermocouple Simulation Range:
 Resolution: 0.1° (1° for R/S/B/C) 
 Accuracy*: ±(0.3°C + 10 µV)
* Accuracy is specified for operating 
temperatures from 18 to 28°C (64 to 82°F)  
for 1 year, not including thermocouple error.
mV Range: -25 to 75 mV 
 Resolution: 10 µV 
 Accuracy: ±0.025% + 1 digit 
Temperature Coefficient: 
0.1 times the applicable accuracy 
specification per °C from 0 to 18°C and 
28 to 50°C (32 to 64°F and  
82 to 122°F) 
Display: 4-digit LCD with max 
reading of 19999 
Input Connector: Miniature 
thermocouple connector (SMP type)
Power: 9V battery (included) 
Battery Life: 17.5 hours nominal with 
low-battery indicator 
Dimensions:  
192 H x 91 W x 52.5 mm D  
(7.5 x 3.5 x 2.1")
Weight: 320 g (0.7 lb) 
Environmental 
Ambient Operating Ranges: 
0 to 50°C (32 to 122°F), <80% RH 
Storage Ranges: 
-20 to 60°C (-4 to 140°F), <70% RH
(included).
Free Thermocouples 
Included!
All CL3515R models include 2 free 900 mm (36") 
Type K insulated beaded wire thermocouple with 
subminiature connector and wire spool caddy. 
Order a Spare! Model No. SC-TT-K-30-36
 To Order Visit omega.com/cl3515r for Pricing and Details
 Model No.  Description
 CL3515R  Thermocouple calibrator
 SC-HH500  Soft case
 RSC-J-1-4-4 Type J retractable cable [0.3 m (1') expands to 1.5 m (5')] 
 RSC-T-1-4-4 Type T retractable cable [0.3 m (1') expands to 1.5 m (5')] 
 RSC-E-1-4-4 Type E retractable cable [0.3 m (1') expands to 1.5 m (5')] 
 RSC-K-1-4-4 Spare Type K retractable cable [0.3 m (1') expands to 1.5 m (5')] 
 88013K  Surface probe up to 815°C (1500°F)
 KTSS-HH  Immersion probe
Comes complete with 2 Type K beaded thermocouples [max temperature 260°C (500°F)], 
9V battery, TAS transition adaptor, 1 Type K cable, 2 PC interface cables, software and 
operator’s manual.
Ordering Example: CL3515R, thermocouple calibrator.
with 2 SMP-M
with 2 SMP-M
with 2 SMP-M
with 2 SMP-M
K-49
Exclusively 
from Omega!