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2 Channel RTD Thermometer with Optional Datalogging Software

High Accuracy PT100 RTD Input Thermometers


Item# HH804U

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $187.37
5-9 $178.00
10-24 $174.25
25-49 $166.76
50-99 $163.01
100+ $159.26

In stock

Lead Time (If not in stock): 7 weeks
High Accuracy PT100 RTD Input Thermometers HH804U HH804U
  • PT100 (100 OHM) Platinum
  • 0.00385/0.003916/0.003926 curves
  • 3 or 4 Wire-RTD
  • High 0.05% Reading Accuracy
  • Elapsed Time
  • Hi/Lo Limits Alarm (Audible)
  • Dual Temperature Display
  • Optional Windows Software
  • Optional AC Adaptor (USB Models Only)

HH804U Model Options

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Data Interface
Measurement Type
Input Type
Additional Feature


The HH804U is a highaccuracy RTD input thermometer.These handhelds work with 100 .platinum PT100 RTDs and are selectablefor 3 different temperaturecoefficient curves. These unitscomply with ITS-90. Both comestandard with a built in USB portand DC power jack. OptionalWindows software and AC adapterallow real time data logging to PCfor extended periods. The HH804Wmodel features aquick and easy to use wirelessinterface instead of USB. Thisallows real time data transmissionat distances of up to 75'.
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Rated 1 out of 5 by from Connectors are an issue!! Connectors require DIN probes. Only a couple of probes are capable of being purchased with the correct DIN probes. No adapters exist. You'll be soldering these and hoping they work. And you won't be able to use the style of RTD probe which best suits your application.
Date published: 2017-08-22
Rated 2 out of 5 by from Difficult connectors Stupid me. The other reviewer warned that the connectors are difficult to solder to the RTD leads. Well, I verified that for myself. I regret buying this device because of that. A good solder connection is critical for proper temp measurement, as well as to keep the conductors from pulling loose during use. Too bad, as the device itself would probably work fine.
Date published: 2017-07-03
Rated 3 out of 5 by from Accurate thermometer but probes are a problem! The RTD probes are very difficult to solder to the connectors!
Date published: 2017-02-07
Rated 2 out of 5 by from No longer CE compliant! Really?!! Meter works great & seems to be quite accurate; however, this item was just designated as "No longer CE compliant". This should be documented somewhere! We planned to give these to our service technicians in Europe, but without CE compliance, it might be held up at customs. Seeking new meter now...
Date published: 2022-04-13
Rated 5 out of 5 by from Robust Travel Thermometer Our company relies on accurate and precise temperature measurements. This thermometer has been bumped around in a tool case, traveled hundreds of miles, and continued to provide results we can count on. An easy to understand user interface and long lasting battery makes this a great tool for those who rely on great results.
Date published: 2020-12-29
Rated 4 out of 5 by from Good unit This unit is a good bang for the buck. The only thing I would change is adding another digit of resolution. Make sure you are good at soldering, the connectors can be a bit tricky.
Date published: 2018-06-19
Rated 4 out of 5 by from I love this meter If you know that you soldier skills are lacking do not buy this meter. I did not have any issue with putting the connector on and have bought about three of these meters. You cannot beat this meter for the price. The connectors were a non issue for me and others that I recommend to purchase.
Date published: 2018-05-08
Rated 4 out of 5 by from Good value, overall. Soldering the extension wires to the probe connector was a bit of a challenge, but the finished product performs as expected.
Date published: 2017-08-24
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How do/can you retrieve readings off the HH804 that doesn't have a USB option?

Asked by: KMehne
The HH804 does not have any internal memory for data storage and there isn't an output connection to link to your PC or Laptop so you cannot data log on this meter.
Answered by: ANBENG
Date published: 2020-01-24


Asked by: Benchmark
Thank you for your inquiry! Unfortunately, the HH804U does not come with probes. The PR-16-2-100-1/16-6-E-HH804 is a handheld probe with the HH804U connector. The PR-10 can also be configured to have this connector on the product page (https://www.omega.com/en-us/temperature-measurement/temperature-probes/probes-with-lead-wires/pr-10/p/PR-10E-4-100-1-8-6)
Answered by: Application Engineer JM
Date published: 2021-03-04

If I want to use this with a flexible RTD sensor, will an HH804 connector type allow for easy use without soldering? (Specifically used with product # HSRTD-3-100-A-40-E-HH804-CONN)

Asked by: Achilles88
Thank you for your inquiry. Soldering is the only way to attached the HH804-CONNECTOR to a RTD.
Answered by: Application Engineer CB
Date published: 2021-10-15

If in Stock how long foes it take to ship

Asked by: Claro
Thank you for your inquiry. Please call our Customer Care team at 1-888-826-6342 to verify stock and shipping time and methods.
Answered by: Application Engineer JB
Date published: 2022-02-09

What is the part number for the USB cable for HH804U

Asked by: DAVY
Hi Davy, Software and cable are sold as a set only; HH800-SW. Best regards
Answered by: NORWALKAE_RS
Date published: 2020-11-25

Will you provide the communication protocol (or VI) that allows accessing meter readings using Labview. I've search forums & found partial code but haven't been successful. Doing this is VALUE ADDED & streamlines integration with test setups!

Asked by: ValueAdded
Omega will provide the HH800 series protocol upon request but does not offer technical support in writing code or debugging issues that may arise. Omega sells the HH800-SW Software to use in collecting data from the HH804U.
Answered by: ANBENG
Date published: 2019-12-22

is this product support windows 10? if so, I will buy right away.

Asked by: BrianChoi
The current version of HH800-SW is compatible with Windows 10 operating systems.
Answered by: ANBENG
Date published: 2020-02-26

Is there publicly available calibration documentation ?

Asked by: Nick Vence
You can contact the Temperature Engineering group at temp@omega.com to access the calibration procedure.
Answered by: ANB ENG
Date published: 2021-03-15
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