text.skipToContent text.skipToNavigation

Four-Channel K Thermocouple Data Logger with USB and RS232

Four-Channel Data Logger with USB and RS232


Item# HH309A

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $357.74
5-9 $339.85
10-24 $332.70
25-49 $318.39
50-99 $311.23
100+ $304.08

In stock

Lead Time ( If not in Stock): 2 weeks

Four-Channel Data Logger with USB and RS232 HH309A HH309A
  • 4 Type K Thermocouple Inputs
  • Displays 4 Channels Simultaneously or 2 Channels with Delta
  • Data Logger with 16,000 Records per Channel
  • USB and RS232 Interface with Windows Software
  • Real-Time Clock
  • Auto Power-Off
  • HOLD Function
  • MAX/MIN Function
  • Resolution 0.1°C/0.1°F
  • Low Battery Indication
5 Year Warranty

Edit Options

View all models

Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Input Type
Display Type
Supply Power
Number of Channels
Communications Protocol

Product Specs

HH309A logger is in the end of its life cycle. As a possible substitute & upgrade, please check out Newest Released 8 Channel Thermocouple Data Logger OM-HL-EH-TC Series for more advanced features with better price.

The HH309A is a small 4-input thermometer plus a powerful data logger. The unit can store up to 16,000 records per channel at programmed intervals. The REC button is used to start and stop recording. You can store as many data sets as you want until memory is full. The unit comes with Windows-based software (Windows 98, NT, XP, ME) for the display and saving of data.

Range: -200 to 1370°C (-328 to 2498°F)
Typical Accuracy: ±0.2% rdg +1°C
Resolution: 0.1° between -200 and 200°C/F, else 1°C/F
Sample Rate: 3 seconds
Operating Conditions:0 to 50°C (32 to 122°F), 0% to 80% RH (0 to 35°C, 32 to 95°F), 0% to 60% RH (35 to 50°C, 95 to 122°F)
Storage Temperature: -20 to 60°C (-4 to 140°F)
Battery: 9 V (included)
Dimensions: 184 H x 64 W x 30 mm D(7.25 x 2.5 x 1.2')
Weight: Approx 250 g (8.8 oz)

Rated 5 out of 5 by from Simple, customizable, and quality I have the HH306A temperature logger, and we've had to increase testing. The HH309A does the exact same as the predecessor model, with more thermocouple inputs. Works great, button commands are a little different than before but easy to figure out if your used to the HH306A model. If not, the manual is pretty straightforward. Wouldn't change a thing.
Date published: 2017-12-07
Rated 5 out of 5 by from Great for Roast Profiling So far so good! Only issue I had was having to figure out through trial and error that the sensors don't work when they contact metal. Otherwise, I'm happy with the unit.
Date published: 2017-05-26
Rated 5 out of 5 by from Terrific Excellent service and perfect product. 100% satisfaction
Date published: 2017-04-09
  • y_2021, m_9, d_23, h_20
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.19
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_3
  • loc_en_US, sid_HH309A, prod, sort_[SortEntry(order=HELPFULNESS, direction=DESCENDING), SortEntry(order=POSITIVE_FEEDBACK, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_omega
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • LOCAL, getReviews, 2ms

Hi ! I did some measurment with many HH309A. The record files are in ".CH4" and it's impossible to open those files with Excel. It's possible to convert in excel file?

Asked by: AlanITP
Please use the HH309A software to convert the .CH4 file format to text that you can import to Excel.
Answered by: NJENG
Date published: 2019-11-16

Can the TC data be read from the device via USB/RS-232 without using the proprietary software? More specifically, we would like to capture its data using a LabView program. Can that be done without having to interface with the included software?

Asked by: Anonymous
This unit does not work with LabView program. It works only with the software provided with this handheld device. USB and RS232C interface work only with windows software supply with this unit. Thank you for your question.
Answered by: Application Engineer
Date published: 2020-03-02

Using the SE309 software to read the Omega 4 chaneel thermometer..... when I connect my power to my computer the results of the software does not work. Is this something to do with the power at the Com port affected by the source power to the computer?

Asked by: ddonato1
If the meter is not connecting to the PC, most likely cause is the driver was not installed properly due to the installer dod not have FULL administration rihgts to the PC. the software will need to be removed and reinstalled with a user that has FULL ADMIN rights.
Answered by: Temperature
Date published: 2019-11-27

I down loaded the software from the omega website for the HH309A, when I connect the device to my computer and try to download or view the data I keep getting a message "link error! please check your connector"

Asked by: Kelly
One of two issue will cause this error, the first being the driver was not installed by a user that has FULL ADMIN rights. The second being a defective cable or meter.
Answered by: Temperature
Date published: 2020-02-13

Can data recorded on the HH309A be read directly off the device or can temperatures recorded be reviewed only on the software provided?

Asked by: Curious George
The HH309A allows user's to view the data live during recording on the Software or download data stored on the logger. It however will not let you view stored data on the meter itself.
Answered by: Applications Engineer AB
Date published: 2021-02-26

In the statistic chart number 2 of the graph showed in software SE309, how can i do for it shows how long time the temperature was in a specific number, for example how long was in 30 C , how long at 40 C, instead of max, min and average.

Asked by: Chepe
Hi Chepe, The software does not provide data functions in addition to the min / max / avg functions. Thank you for your question.
Answered by: NorwalkAE_RS
Date published: 2019-08-14

When setting record interval it shows 00:15. Is that minutes:seconds? What are time units?

Asked by: StanNASA
The units for the interval setting is MIN:SEC
Answered by: Applications Engineer AB
Date published: 2020-10-05
  • y_2021, m_9, d_23, h_20CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.19
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_7
  • loc_en_US, sid_HH309A, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_omega
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • LOCAL, getContent, 0ms
Spare Type K thermocouple
50 In Stock
Power adaptor, 115 Vac
44 In Stock
61 In Stock
Spare RS232 interface cable
10 In Stock
USB interface cable (spare)
24 In Stock
Replacement MINI-TRIPOD expands 142 to 279mm (5.6 to 11")
140 In Stock

Save Configuration