Skip to Main Content
  • Instrumart
Instrumart logo
  • Products
  • Brands
  • Applications
  • Lab
  • Blog
  • Account
  • Email Us
  • 1-800-884-4967
  • What can we help you find?

    Can’t find what you’re looking for? Contact one of our engineers today. We’re open 8:00 am to 5:30 pm ET.
    • 1-800-884-4967
    • Email Us
    • Live Chat
  1. Temperature Calibrators
  2. Thermocouple Calibrators

PIE 311 / 311Plus Automated Universal RTD Calibrator

Read & source RTDs with ±0.015% accuracy, available as single channel RTD or dual channel RTD & milliamps.

PIE 311 / 311Plus Automated Universal RTD Calibrator
PIE 311 Automated Universal RTD Calibrator
Starting at $2,019.00

View Company Reviewsby Trustpilot
Manufactured
  • By PIE Practical Instrument Electronics
Includes
  • FREE Ground Shipping
  • FREE Lifetime Tech Support
Availability
  • Some models in stock. View available part numbers.
Product Manual Product Specs (2 Files)
Questions?
Call 1-800-884-4967 or Email Us.
Open 8:00 am to 5:30 pm ET.
Trustpilot

Overview

Features

  • ±0.015% of reading + 0.05Ω accuracy
  • Relative humidity range:
    • 10% ≤RH ≤90% (0 to 35°C) non-condensing
    • 10% ≤RH ≤70% (35 to 60°C) non-condensing
  • Optional milliamp channel (311Plus)
    • Sources & reads 0 to 24mA
    • Includes current leakage test
  • Calibrates directly in °F & °C
  • Automatically detects 2, 3, or 4 wire RTDs
Instrumart logo

This is the recommended replacement for the Altek 311, 311A, 311A-KP Universal RTD Calibrator.


Description

The PIE 311 / 311Plus automated universal RTD calibrator automatically detects 2, 3, or 4 wire RTDs. It can be used to calibrate and measure all RTD instruments and sensors, automatically indicating connections on the display to simplify hookups.

It is available as a single channel RTD (PIE 311) or double channel milliamp and RTD calibrator (PIE 311Plus). Both models are compatible with any smart transmitter, PLC, DCS, or multichannel recorder.

The PIE 311 / 311Plus features automatic output stepping for fast calibration. Choose between 2, 3, 5, 11 and 21 steps to automatically increment the output in 100, 50, 25, 10 or 5% of span. Then select the step time to match your system from 5, 6, 7, 8, 10, 15, 20, 25, 30 and 60 seconds.

PIE 311 / 311Plus Automated Universal RTD Calibrator Models:

  • PIE 311-BP: Includes RTD AutoDetect, rubber boot, and NIST certificate
  • PIE 311: Includes RTD AutoDetect, rubber boot, carrying case, test leads, and NIST certificate
  • PIE 311PLUS-BP: Includes LeakDetect, RTD AutoDetect, rubber boot, and NIST certificate
  • PIE 311PLUS: Includes LeakDetect, RTD AutoDetect, rubber boot, carrying case, test leads, and NIST certificate

Documents

Spec Sheets

  • PIE 311 Automated Universal RTD Calibrator Datasheet PDF (566 KB)
  • PIE 311Plus Automated Universal RTD Calibrator Datasheet PDF (1.0 MB)

Manuals

  • PIE 311 Automated Universal RTD Calibrator Manual PDF (1.0 MB)
  • PIE 311Plus Automated Universal RTD Calibrator Manual PDF (1.3 MB)

Links

  • All possible part numbers

Accessories

PIE RTD Wire Kit
PIE RTD Wire Kit

2 red and 2 black leads with retractable shield banana plugs and spade lugs.

In Stock
$95.00
PIE Ni-MH Batteries and Charger
PIE Ni-MH Batteries and Charger

Ni-MH 1 hour charger with 4 Ni-MH AA batteries.

$126.00
PIE 020-0236 Magnet and Hanging Strap
PIE 020-0236 Magnet and Hanging Strap

Hang your PIE calibrator from racks, cabinets, and from pipes.

In Stock
$20.00

In Stock

Part Number Price Available
PIE 311
Show Configuration
$2,134.00 1 in stock
PIE 311PLUS
Show Configuration
$2,559.00 1 in stock
Configuration for PIE 311
Base Price:
$0.00
Channels
Includes RTD AutoDetect, NIST certificate, rubber boot, carrying case, and test leads (+$2,134.00)
Reconfigure
Configuration for PIE 311PLUS
Base Price:
$0.00
Channels
Includes LeakDetect, RTD AutoDetect, NIST certificate, rubber boot, carrying case, and test leads (+$2,559.00)
Reconfigure

Interested in Other Part Numbers?

Other part numbers are available to order but are not currently in stock. Current availability for non-stock parts is "Usually ships in 4-6 weeks". Click here to select options

Need Help? Call a Calibration engineer at 1-800-884-4967

We're open 8:00 am to 5:30 pm ET

John A. headshot John A.
Senior Applications Engineer
19 years at Instrumart
Mike C. headshot Mike C.
Senior Applications Engineer
24 years at Instrumart
Shawn S. headshot Shawn S.
Senior Applications Engineer
30 years at Instrumart
Liam W. headshot Liam W.
Applications Engineer
2 years at Instrumart
Angelo S. headshot Angelo S.
Cal & Pressure Engineering Lead
6 years at Instrumart
Nate H. headshot Nate H.
Applications Engineer
2 years at Instrumart
Brynn O.S. headshot Brynn O.S.
Applications Engineer
3 years at Instrumart
Fabian M. headshot Fabian M.
Applications Engineer
Mark D. headshot Mark D.
Applications Engineer
14 years at Instrumart
John A. headshot John A.
Senior Applications Engineer
19 years at Instrumart
Mike C. headshot Mike C.
Senior Applications Engineer
24 years at Instrumart
Shawn S. headshot Shawn S.
Senior Applications Engineer
30 years at Instrumart
Liam W. headshot Liam W.
Applications Engineer
2 years at Instrumart
Angelo S. headshot Angelo S.
Cal & Pressure Engineering Lead
6 years at Instrumart
Nate H. headshot Nate H.
Applications Engineer
2 years at Instrumart
Brynn O.S. headshot Brynn O.S.
Applications Engineer
3 years at Instrumart
Fabian M. headshot Fabian M.
Applications Engineer

Recently Viewed

PIE 311 / 311Plus Automated Universal RTD Calibrator
PIE 311 / 311Plus Automated Universal RTD Calibrator
United States Canada Mexico
Shop
Products
Brands
Applications
Support
Customer Service
Ask a Question
Live Chat
Track Order
Fraud Prevention
Financing
Our Company
Blog
About Us
Contact Us
Jobs
Travel Information
Our Team
Privacy Policy
Terms and Conditions of Sale
Terms and Conditions of Purchase
Accessibility Statement
Connect
1-800-884-4967
sales@instrumart.com
Instrumart
35 Green Mountain Dr
S Burlington, VT 05403 US
Mo-Th 8:00am to 5:30pm ET
Fr 8:00am to 5:00pm ET
Join Us on Facebook
Follow Us on X

Instrumart is a member of a family of industrial stores

Instrumart Compressor World Pump World BioPharm World Filtration World Motion World Qualitrol Engineered Solutions Wholesale Air Pipe
© Instrumart 2025

Family of Industrial Stores

Welcome to our family of stores, your go-to source for a wide selection of commercial and industrial products in the flow control and automation sectors. Each store features a curated range of specialized industrial solutions, with many items designed to complement each other, ensuring you can find everything you need for your specific application. Explore the stores below to discover our extensive product offerings for your business needs.

  • Instrumart

    Shop Industrial and Laboratory Instruments.

    Shop Now!
  • Compressor World

    Shop Compressed Air Equipment.

    Shop Now!
  • Pump World

    Shop Industrial, Water, and Waste Water Pumps.

    Shop Now!
  • BioPharm World

    Shop Sanitary Process Solutions and Products.

    Shop Now!
  • Filtration World

    Shop Industrial Filters.

    Shop Now!
  • Motion World

    Shop Motion Control and Process Automation Systems.

    Shop Now!
  • Qualitrol

    Shop Remanufactured or Repair Automation Products.

    Shop Now!
  • Engineered Solutions

    Shop Custom Engineered and Manufactured Systems.

    Shop Now!
  • Wholesale Air Pipe

    Shop Air Piping.

    Shop Now!