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  • Accuracy ±(0.015% of mV Setting + 0.009mV)
  • Calibrate in temperature for your T/C type
  • Adjustable temperature output in selectable 0.1°C or 0.1°F steps
  • Compatible with single (520B) or multiple (521B) thermocouple types
  • Typical accuracy of ±0.35°C (0.5°) for Type K
  • EZ-Dial knob easily adjust output by 0.1°C or 0.1°F
  • Three position EZ-Check switch for 0% and 100% span adjustments
  • Uses standard "AA" Alkaline Batteries
  • Superior battery life of 45 hours under typical continuous usage
  • Easy access to battery compartment
  • Lightweight and Rugged with a Solid Feel
  • Small and tough
  • Protected to 60V
  • NIST Traceable Calibration Certificate

The PIECAL 520B & 521B thermocouple sources simulate standard thermocouple curves over the entire industrial temperature range. Both units provide a precise, economical, easy to use thermocouple source for checkout and calibration of all thermocouple instruments—including transmitters, recorders, controllers, alarms, data acquisition, and computer systems—in the field, shop or control room

The PIECAL 520B & 521B thermocouple sources work with the thermocouples you use including types J, K, T, E, R, S, B, N, G, C, D, L (J-DIN), U (T-DIN) and P (Platinel II). Choose the PIECAL 520B if you have only one type of thermocouple connected to your instruments or the PIECAL 521B if you have multiple types of thermocouples. Both units include a miniature thermocouple connector on the top end for fast connections and are cold-junction compensated for changes in ambient temperature.

The PIECAL 520B & 521B thermocouple sources work with both newer instruments as well as older instruments. Easily set any value quickly to within 0.1° with the adjustable digital potentiometer plus store any three temperatures for instant recall with the EZ-CHECK switch. The 520B and 521B include a backlit display with larger digits, rugged switches and a battery compartment for fast battery changes. Add an optional rubber boot with tilt stand for extra protection.

The PIECAL 520B and 521B RTD simulators ship complete with:

  • Alkaline batteries
  • Certificate of calibration
  • mV wire kit (1 red & 1 black leads with retractable shield banana plugs & alligator clips)
PIECAL 520B/521B thermocouple simulator specifications:
Accuracy ±(0.015% of reading + 0.009 mV)
Cold Junction Compensation ±0.25°C
MIllivolt Range -13.000 to 80.000 mV
Batteries Four "AA" Alkaline 1.5V
Protection against misconnection Over-voltage protection to 60 V dc (30 seconds)
Display High contrast graphic LCD with backlight
Output Impedance < 0.3Ohms
Source Current > 20 mA (drives 80 mV into 10 Ohms)
Noise ≤ 4 µV p-p for frequencies ≤ 10 Hz
Thermocouple Ranges and Accuracies
Type J -200.0 to -180.0°C at ±0.5°C
-180.0 to -50.0°C at ±0.4°C
-50.0 to 500.0°C at ±0.3°C
500.0 to 1200.0°C at ±0.4°C
Type K -230.0 to -100.0°C at ±0.8°C
-100.0 to 1050.0°C at ±0.4°C
1050.0 to 1371.1°C at ±0.5°C
Type T -260.0 to -200.0°C at ±1.2°
-200.0 to -50.0°C at ±0.7°C
-50.0 to 0.0°C at ±0.4°C
0.0 to 400.0°C at ±0.5°C
Type E -240.0 to -200.0°C at ±0.6°
-200.0 to -100.0°C at ±0.4°C
-100.0 to 850.0°C at ±0.3°C
850.0 to 1000.0°C at ±0.4°C
Type R -13.3 to 250.0°C at ±1.4°
250.0 to 750.0°C at ±0.8°C
750.0 to 1600.0°C at ±0.7°C
1600.0 to 1767.8°C at ±0.8°C
Type S -18.3 to 100.0°C at ±1.4°
100.0 to 400.0°C at ±1.0°C
400.0 to 1700.0°C at ±0.8°C
1700.0 to 1767.8°C at ±0.9°C
Type B 315.6 to 550.0°C at ±2.0°
550.0 to 900.0°C at ±1.3°
900.0 to 1150.0°C at ±0.9°C
1150.0 to 1820.0°C at ±0.8°C
Type N -230.0 to -180.0°C at ±1.2°
-180.0 to -50.0°C at ±0.7°C
-50.0 to 1100.0°C at ±0.4°C
1100.0 to 1300.0°C at ±0.5°C
Type G (W) 100.0 to 150.0°C at ±1.4°
150.0 to 400.0°C at ±1.0°C
400.0 to 1700.0°C at ±0.6°C
1700.0 to 2320.0°C at ±0.9°C
Type C (W5) -1.1 to 1500.0°C at ±0.7°
1050.0 to 1900.0°C at ±0.8°C
1900.0 to 2100.0°C at ±0.9°C
2100.0 to 2320.0°C at ±1.1°C
Type D -1.0 to 50.0°C at ±0.8°
50.0 to 1400.0°C at ±0.6°C
1 400.0 to 1800.0°C at ±0.7°C
1800.0 to 2320.0°C at ±1.1°C
Type P -217.8 to -150.0°C at ±0.8°
-150.0 to -50.0°C at ±0.6°C
-50.0 to 1000.0°C at ±0.4°C
1000.0 to 1395.0°C at ±0.5°C
Type L (J-DIN) -200.0 to -50.0°C at ±0.4°
-50.0 to 500.0°C at ±0.3°C
500.0 to 750.0°C at ±0.4°C
Type U (T-DIN) -200.0 to -75.0°C at ±0.5°
-75.0 to 100.0°C at ±0.4°C
100.0 to 600.0°C at ±0.3°C


PIE Ni-MH Batteries and Charger
Ni-MH 1 hour charger with 4 Ni-MH AA batteries


Please consider these optional accessories.

PIE Mini Plug Lead Kit for J, T, E K TCs
Mini plug lead kit with stranded wire for J, T, E and K thermocouples
PIE Mini Plug Lead Kit for B, R/S, N TCs
Mini plug lead kit with stranded wire for B, R/S and N thermocouples
PIE Rubber Boot
Protective rubber boot with tilt stand
PIE Certified Test Data for Calibrators and Simulators
PIE 020-0236 Magnet and Hanging Strap
Hang your PIE calibrator from racks, cabinets, and from pipes
Part Number Price Available
PIE 521B
Show Configuration
Base Price
Thermocouple Type
Types J, K, E, T, R, S, B, N, G, C, D, L, U and mV (+$134.00)
$699.00 1

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