At Palmer Wahl, we take pride in being one of America’s longest-running manufacturers, with a legacy that began in 1836 and continues today from our Asheville, North Carolina facility. For nearly 190 years, we have focused on designing and manufacturing highly precise temperature measurement tools that industries around the world rely on—from food processing and […]
In high-stakes industrial environments, precision and reliability aren’t optional— they’re essential. That’s why Palmer Wahl is proud to offer the Digi-Stem® Advanced Digital Process Pressure Gauge with Data Logger, Alarms, and optional Transmitter & Switch (DSPG) — the latest innovation in our trusted Digi-Stem® lineup. Uncompromising Accuracy The DSPG delivers 0.1% accuracy at 23°C across pressure types including Relative, […]
In 2026, Palmer Wahl marks an extraordinary milestone: 190 years as America’s first instrumentation company, proudly serving industry since 1836. This celebration is not about looking backward with nostalgia. It is about honoring a legacy that continues to shape how precision, reliability, and trust are defined in industrial measurement today. Where It All Began Founded […]
In industrial environments where precision matters, small errors can lead to big consequences. Pressure gauges are often the unsung heroes of process reliability, yet when they’re even slightly off, the ripple effects can reach far beyond a single reading. From energy plants to chemical processing to manufacturing lines, inaccurate pressure measurement doesn’t just risk equipment […]
Every industrial process is unique, and so are its measurement challenges. Off-the-shelf temperature sensors may work for routine applications, but when accuracy, durability, or speed of response is critical, you need a solution designed specifically for your environment. That’s where Palmer Wahl’s Custom Engineered Temperature Sensor Assemblies come in. Partnering With Our Engineers At Palmer […]
When it comes to precision temperature measurement, one size rarely fits all. Every process, plant, and application has unique requirements—from power supply and mounting constraints to environmental challenges and response-time expectations. That’s why Palmer Wahl designed the DST700 Wahl Digi-Stem® Advanced RTD Digital Thermometer with Data Logger and Optional Transmitter and Switch as part of […]
Windows in our Palmer 8" and 12" Circular Chart Recorders - both Aluminum and Pelican® style cases - can be user replaced in the field if necessary. Watch our Instructional Videos to learn more: Aluminum Case Pelican Case
Our DST700 Wahl Digi-Stem® Advanced RTD Digital Thermometers feature Easy Connect connectors on all remote probes. These M12 connectors make it simple to securely connect and disconnect the meter without removing the installed probe. Straight and 90° Angle versions are available to fit the requirements of your installation. Simply plug in and tighten the nut […]
The DP Cell unit on Palmer Differential Pressure Recorders is made of Steel and has a safe working pressure of 2,500 psi. The housing is secured with a quantity of 6 steel bolts of size 1/2-13 x 5.5. When using these instruments in applications where solids or semi-solids may accumulate inside the pressure housings, periodic […]
Palmer Wahl endeavors to pack our customers’ products with the utmost care to ensure they arrive at their destination without damage. Sometimes, though, problems happen. Our policy below is to help customers get restitution in the event of a shipping damage issue. Palmer Wahl cares about customers receiving the products they purchase and will support […]
Download these instructions for printing Digi-Stem® DST300, DST400, DST500, DST600, DSP Series and the HSICBB-P Portable Ambient Blackbody units are powered by Lithium Metal Batteries. Transportation regulations require that products powered by Lithium Metal batteries are shipped without the battery installed, with the exception of the HSICBB-P, which has a power switch and must be […]
The United States Food & Drug Administration is "...responsible for protecting the public health by assuring the safety, efficacy, and security of human and veterinary drugs, biological products, medical devices, our nation's food supply, cosmetics, and products that emit radiation." As a part of this mission, the FDA regulates the thermal processing of low acid […]
There are two basic types of electronic temperature sensors: thermocouples and resistance sensors (primarily RTDs and thermistors.) Thermocouples have much less mass in the sensor itself, and can be grounded - meaning the sensor actually touches the inside wall of its protective sheath, giving a much quicker transfer of heat energy - for a non-transmitting […]
Wahl TM Series meters ( TM612 and TM630) underwent a product line upgrade in 2016 that changed the standard connector on these meters. The original meters (part numbers TM612 an TM630) are dark gray and blue, with a light gray protective rubber boot. They feature a M8x1, 4 pin connector. The current meters (part […]
Need help choosing the correct Digi-Stem® Meter for your application? Digi-Stem® Digital Temperature Meters are available with different measuring technologies and configurations to meet the needs of your application. Models are available in Thermocouple and RTD varities, with or without transmitters. Specialty models are available for Intrinsically Safe applications, and where Max-Min temperature recording is […]
Palmer Wahl will once again be attending the IFTPS annual meeting (Institute for Thermal Processing Specialists), to be held this year in Nashville, TN. Happening March 12 - 14 at the Lowe's Nashville Hotel, Palmer Wahl will be there with our DST600 Digi-Stem® RTD Meters for retorts, as well as our new DSP Digi-Stem® Advanced […]
Our new DSP Digi-Stem® Digital Pressure Gauge is an Advanced Digital Pressure Gauge for use in industrial processes. An extension of our perenially popular Digi-Stem® Process Thermometers utilizing the same rugged and durable housing, the DSP offers precision and durability in pressure measurement. Key Features of the DSP Advanced Digital Pressure Gauge: Accuracy and […]
Are you interested in how Infrared Temperature Measurement works? Are you trying to understand the physics behind the process? Wahl Instruments invented portable handheld infrared temperature measurement with our Heat Spy series. Our expertise in infrared means we know it inside and out - and we're happy to share our knowledge! Watch our Seven Part […]
Palmer Wahl will be displaying in Booth 3052 at the upcoming AISTech event in Columbus, OH! Held at the Greater Columbus Convention Center May 6 - 9, 2024. The Premier Technology Event for the Steel Industry, Palmer Wahl will be showcasing our Non-Contact Temperature Sensors (both Fixed and Handheld), as well as our High Temperature […]
Restrictions of Mercury Added Products A number of US states and foreign countries prohibit the use of mercury in their territories. These include: California Connecticut Illinois Louisiana Maine Massachusetts Michigan Minnesota New Hampshire New York Ohio Rhode Island Vermont Washington Wisconsin Canada This list is subject to change without notice. Make sure you know the […]
Sanitary Flanges are installed for use on a piece of pipe, using a Tri-Clamp hygenic fitting connection to make cleaning quick and easy. The most important part of choosing a Sanitary Flange and Tri-Clamp fitting for your installation is selecting the correct size Sanitary Flange for your application. Remember, the size of the flange is […]
Palmer Wahl offers a standard Certificate of Conformance on the bottom of each packing list, included with your order when it ships. The standard Certificate of Conformance looks like this: Sometimes more information is required. If so, we also offer a Long Form Certificate of Conformance, available for an additional charge. The Long Form Certificate […]
A wide variety of thermocouple types exist, each reading temperature by measuring a voltage generated by the difference between two dissimilar electrical conductors that form an electrical junction. The voltage is generated as a result of the Seebeck effect, and is measurable to be interpreted into a temperature. Thermocouples are: Interchangeable, utilizing standard connectors Measure […]
Palmer Circular Chart Recorders are available in five different case mounting styles. Select the one most appropriate for your application. Reference the above dimensions for each mounting style sketch. Wall Mount Wall mount recorders come with hangers attached, allowing you to mount your recorder with 1/4 inch diameter screws, with the back of the box […]
As the manufacturer, Palmer Wahl is able to provide our extensive experience to our customers. Our personnel have years of experience in a variety of industries, with familiarity of an assortment of applications. Many of our existing products can be modified to meet special requirements, or we can work with you to create a product […]
Palmer Wahl offers an assortment of handheld probes to fit Thermocouple and RTD handheld meters. Our Heat Prober Hand Held RTD probes have different connectors to fit our Heat Prober meters. Thermocouple Probes have the ANSI Mini-Connector for the appropriate thermocouple type of the probe. RTD probes are available with four different connectors: 4 Pin […]
view tc850 dipstick specs To connect tip upon receipt of tc850: Remove screws and carrier top to expose the meter, and remove. Insert the tip into the lance, and lock into place with 2 screws. Attach Chromel lead (with yellow jacket) to the + (positive) terminal of the connector Attach Alumel lead (with red jacket) […]
The following information is an excerpt from "Reproducibility of the temperature of the ice point in routine measurements" published by the Commerce Department, National Institute of Standards and Technology (NIST), 1995. The complete document is available on their website. A properly prepared ice bath is one that consists of a cylindrical Dewar flask (a typical […]
Dipstick Meters for Molten Metal Dips are available in a variety of configurations.
View our available ST2200 Series Soldering Iron Testers
Do you need to replace the probe on your Digi-Stem® DST600 Series Meter? Our electronics tech walks you through the process, step-by-step.
Learn about the different types of electronic temperature sensing and how they work.
Palmer Circular Chart Recorders with Pelican® brand cases are available for Temperature, Pressure, Combination, and Test & Valve Recorders in both 8 and 12 inch cases.
Learn more about initiatives to reduce or eliminate Mercury from the waster stream Northeast Waste Management Officials Association - Interstate Mercury Education & Reduction Clearinghouse (IMERC)
Palmer Wahl manufactures products that contain Mercury, Electronic components, and batteries. Each of these have specific methods of safe disposal. Mercury Products, Batteries and Electronic Disposal Mercury Recycling (Redirects to heritage-enviro.com) Consumer Guide to Battery Recycling (Redirects to energy.gov) Electronics Donation and Recycling Guidance (Redirects to epa.gov)
Use SQC for determining the sample size and criteria for various popular quality control procedures, including ISO and others. Online Calculators and Tables for SPC/SQC
Palmer Aluminum Case Circular Chart Recorders are available in temperature and pressure variations, with five different case mounting styles. Select the one most appropriate for your application. Reference the above dimensions for each mounting style sketch. Wall Mount Wall mount recorders come with hangers attached, allowing you to mount your recorder with 1/4 inch diameter […]
Are you trying to locate a part you already have? Palmer Wahl's engineering team creates special designs If your part number begins with C, DP, or PW it is likely a special product that was custom designed for you. If you need help identifying one of these parts, please contact us.
Many of our Digi-Stem thermometers are available with Remote Probes to allow for installation in a variety of applications. We offer two different types of Straight Quick Disconnect connectors: standard (metal) quick disconnect hardware and thermoplastic polyurethane quick disconnectors. Both connectors are IEC IP67 Rated. Please note that cables with molded connectors are made to […]
Palmer Wahl offers DSTCAL software for the calibration of our Digi-Stem DST600 units. Watch below to see a demonstration performed by our product expert, Jim Eldridge, to learn more.
From time to time your Palmer Pressure Recorder may require calibration. Watch this video for a hands-on demonstation on how to do it with our Product Supervisor, Kim Banks.
Replace the pressure system in your existing Palmer pressure recorder for repairs, or to change the range of your unit. Our production manager, Kim Banks, show you how below.
Download this chart to learn about proven methodologies for prioritizing abnormalities. For use with Infrared Inspection of Electrical and Mechanical Systems. Overheat guidelines
USDA Equipment Acceptance Certificate for the DST600, DST500, and DSX500. Complance with NSF/ANSI/3-A-14159-1-2019 (Hygiene Requirements for the Design of Meat and Poultry Processing Equipment). View Certificate
Wahl Digi-Stem® with Multi-Probe switch saves budget and keeps first responders safe! LEARN MORE
Midwest Food Processing Company Reduces Costs, Increases Processing Speed, and Improves Measurement Accuracy with the Wahl Digi-Stem® LEARN MORE
This information is excerpted from NBS Monograph 90 Mercury separations commonly occur as a result of exposure to shock and rough handling during shipment. This condition can generally be corrected by carefully following the procedure below, which was developed by the National Bureau of Standards, the predecessor of NIST: The National Institute of Standards and […]
The following information is an excerpt from "Reproducibility of the temperature of the ice point in routine measurements" published by the Commerce Department, National Institute of Standards and Technology (NIST), 1995. The complete document is available on their website. A properly prepared ice bath is one that consists of a cylindrical Dewar flask (a typical […]
We offer both Mercury and Liquid actuated temperature systems in our Rigid & Remote Dial Thermometer systems. Find drawings and descriptions of the liquid actuated temperature bulb styles available below. 81 Series Remote Bulbs for Remote Reading Dial Thermometers - Liquid Actuated 1B Liquid Filled Case Compensated Thermal System. These temperature systems are filled with […]
We offer both Mercury and Liquid actuated temperature systems in our Rigid & Remote Dial Thermometer systems. Find drawings and descriptions of the temperature bulb styles available below. 51 Series Remote Bulbs for Remote Reading Dial Thermometers - Mercury Actuated 5B Mercury Filled Case Compensated Thermal Systems For ranges over 500°F mercury is used in […]
Temperature bulbs for temperature chart recorders are available in the different configurations shown below. Note: All mercury filled systems conform to ASME 5B. Non-mercury systems conform to 1A with capillary over 30 feet and 1B with capillary under 30 feet. Mercury and Non-Toxic filled systems are constructed of 304 stainless steel and have a maximum […]
Title 21 of the US Code of Federal Regulations concerns the FDA department of Health & Human Services and how they regulate food for human consumption. Part 113 of the title specifically concerns Thermally Processed Low-Acid Foods packaged in hermetically sealed containers. Visit the Electronic Code of Federal Regulations, Title 21 page for more information. […]
Transmitter for Pet Food Processing U.S. Pet Food Processing Company uses Wahl Transmitters to increase measurement accuracy for safe and healthy dog food! LEARN MORE
