The Practical Instrument Electronics (PIE) Model 322, 422, 520, 521, 522, and 525 are the industry's premier handheld Thermocouple (TC or T/C) calibrators. These small, lightweight, rugged calibrators provide several T/C curves, including mV, with the flexibility for custom curves to meet your needs! These units feature long battery life, selectable °C or °F, and internal cold-junction compensation.
The Model 525 also features a dual role as an RTD calibrator!
Thermocouple (T/C) Calibrators
Click on a calibrator for more information....
PIECAL 322-1
T/C Source with 4 types
Plus mV
PIECAL 422
T/C Source with 14 types
Plus mV
Model 520
T/C Single Type Source
T/C Type
Model 521
T/C Source with 8 types
Plus mV
Model 522
T/C Read & Source with 8 types
Plus mV
Model 525
T/C & RTD
Dual Calibrator
Function Comparison
Source 1 T/C Type
Source
Selectable T/C Types
Read
T/C
Resolution
Auto-stepping
Source & Read RTD
520
X
1°
521
8
0.1°
522
8
X
0.1°
322
4
X
0.1°
422
14
X
0.1°
525
X
X
0.1° or 0.01°
X
X
X - Indicates most accurate calibrator in that function
