PIE 520B / 521B Thermocouple Simulators

Source-only thermocouple calibrators for checking transmitters, recorders, controllers, and alarms — 521B covers 14 TC types plus mV with NIST Traceable Certificate included.

Key advantages

14 TC types + mV (521B) — J, K, E, T, R, S, B, N, G, C, D, L, U and mV.
±(0.015% of mV setting + 0.009 mV) — typical ±0.35 °C for Type K.
EZ-Dial / EZ-Check — 0.1 °C/°F steps; 0%/100% span switch; miniature TC connector.
NIST included — ~45 h AA battery life; 60 V protection; optional boot/case.

Typical applications

Field/shop source calibration of TC instruments without carrying a decade box.
Cold-junction compensated temperature simulation into PLC/DCS/recorder inputs.

Selection guide

520B vs 521B — Confirm type count and functions for 520B vs 14-type 521B on RFQ (this SKU lists both).
Accuracy — ±(0.015% of mV setting + 0.009 mV).
Output — Temperature in °C/°F or mV; source only (not a dual measure/source meter).
Power — Standard AA alkaline; long continuous run time.
Accessories — Rubber boot, TC wire with miniature connector, carrying case optional.

Common mistakes

Expecting measure mode — 521B page positions it as source only.
Ordering fewer TC types than needed — lock 520B vs 521B.
Forgetting cold-junction expectations of the instrument under test.
Calibration

When to RFQ / what to tell us

520B vs 521B; TC types required.
Boot/case/lead accessories; quantity; ship-to.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	34585
Brand	PIE (Practical Instrument Electronics)
Model	520B / 521B
Product type	thermocouple simulator (source)
Accuracy	±(0.015% of mV setting + 0.009 mV); typical ±0.35 °C Type K (521B)
Output signal	Simulated TC temperature or mV (source only)
Supply voltage	AA alkaline batteries
Notes	521B specs from piecal.com; NIST certificate included on 521B listing. Confirm 520B differences on RFQ.

Documents

PIE 521B product page

FAQ

Q: Source only or measure too? A: 521B is positioned as a thermocouple source (plus mV). State if you need a measure/source multifunction instead.

Q: What should I send for a quote? A: 520B vs 521B, TC types, accessories, quantity. Compatible with systems using PIE 520B/521B if you need a drop-in check — we do not claim authorized-dealer status.