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. Data Loggers

Watlow D4T Data Logger

1/4 DIN data logger, field removable I/O modules for maximum design flexibility, 4.3 inch color, graphical touch panel.

Watlow D4T Data Logger
Watlow D4T Data Logger
Retired products cannot be ordered
The Watlow F4T Process Controller is the recommended replacement

View Company Reviewsby Trustpilot
Manufactured
  • By Watlow
  • Made in the USA
Includes
  • FREE Ground Shipping
  • FREE Lifetime Tech Support
Product Manual Product Specs (2 Files)
Questions?
Call 1-800-884-4967 or email sales@instrumart.com. Open 8:00 am to 5:30 pm ET.
Trustpilot

Overview

Features

  • 6 slots for flex modules (up to 24 channels)
    • High density modules have 4 channels per slot
  • 4.3-inch, color touch panel
  • Ethernet Modbus TCP connectivity
  • Programmable function blocks
  • Multiple high-speed USB host ports
  • COMPOSER graphical configuration PC software
  • Flexibility to meet diverse process applications
  • NEMA 4X/IP65

Description

The Watlow D4T data logger offers a wide range of field removable I/O modules for maximum design flexibility. Configurations can be custom tailored to meet the scaling needs of a tremendous range of equipment and applications while providing exactly the hardware types required for compatibility. It is compatible with temperature, altitude, humidity, AC current and other 0-10VDC or 0-20mA process units.

The D4T easily complies with regulatory standards with the ability to choose encrypted, CSV or both types of file formats for tamper proof record needs. The D4T simplifies record keeping management with ability to archive records to the cloud or a connected PC network.

Documents

Spec Sheets

  • Watlow D4T Data Logger Datasheet PDF (842 KB)
  • Watlow D4T Data Logger Brochure PDF (12.3 MB)

Manuals

  • Watlow D4T Data Logger Setup and Operations Manual PDF (11.7 MB)
  • Watlow D4T Data Logger Installation and Troubleshooting Manual PDF (4.2 MB)

Links

  • All possible part numbers

Accessories

Watlow Mixed I/O Flex Modules
Watlow Mixed I/O Flex Modules

Single channel module for use with the Watlow F4T or D4T, 2 outputs available.

Some Models in Stock
Starting at $36.00
Watlow Communication Flex Module
Watlow Communication Flex Module

Modbus RTU 232/485 communications for slot 6 of the Watlow F4T or D4T.

Some Models in Stock
Starting at $103.00
Watlow Limit Flex Module
Watlow Limit Flex Module

Limit control with universal, thermistor and temperature inputs for use with Watlow F4T or D4T.

Some Models in Stock
Starting at $134.00
Watlow High Density Flex Modules
Watlow High Density Flex Modules

Four channel input module for use with the Watlow F4T or D4T.

Some Models in Stock
Starting at $111.00

Applications

Here's how some of our customers use this product...

Configurable High Input Data Logger

The Background: Our customer is a manufacturer seeking a data logger capable of recording data from 20 inputs so they can create an electronic record of parameters associated with their production process.

The Problem: The customer wants a compact logger with a display that can be expanded at a later time.

The Solution: We suggested the Watlow D4T data logger which can have up to 24 inputs and will fit in a standard 1/4 DIN panel cutout. The D4T has Plug-and-Play I/O cards so they can change the configuration in the future as their needs change.

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

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

Luke M. headshot Luke M.
Applications Engineer
5 years at Instrumart
David S. headshot David S.
Applications Engineer
Shawn D. headshot Shawn D.
Senior Applications Engineer
20 years at Instrumart
Ron J. headshot Ron J.
Temperature Engineering Lead
29 years at Instrumart
Dwight M. headshot Dwight M.
Senior Applications Engineer
28 years at Instrumart
Rhys D. headshot Rhys D.
Applications Engineer
Alex A. headshot Alex A.
Senior Applications Engineer
19 years at Instrumart
Luke M. headshot Luke M.
Applications Engineer
5 years at Instrumart
David S. headshot David S.
Applications Engineer
Shawn D. headshot Shawn D.
Senior Applications Engineer
20 years at Instrumart
Ron J. headshot Ron J.
Temperature Engineering Lead
29 years at Instrumart
Dwight M. headshot Dwight M.
Senior Applications Engineer
28 years at Instrumart
Rhys D. headshot Rhys D.
Applications Engineer
Alex A. headshot Alex A.
Senior Applications Engineer
19 years at Instrumart
Luke M. headshot Luke M.
Applications Engineer
5 years at Instrumart
Are you located in New England? Schedule an On-site Visit!

Recently Viewed

Watlow D4T Data Logger
Watlow D4T Data Logger
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
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!