Portable Temperature/Humidity Data Loggers with USB Interface
$70.98
Item# OM-141
Volume discounts available
Volume Discount Schedule
| Quantity | Price each |
|---|---|
| 1-4 | $70.98 |
| 5-9 | $67.43 |
| 10-24 | $66.01 |
| 25-49 | $63.17 |
| 50-99 | $61.75 |
| 100-199 | $60.33 |
| 200+ | $59.50 |
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Lead Time ( If not in Stock): 7 weeks
Portable Temperature/Humidity Data Loggers with USB Interface is rated
out of
5 by
15.
- One Button Starts/Stops Data Logging Without a PC
- Plug-and-Play USB 2.0 Interface No Need for Cables, Cradles or Docks
- Large Storage Capacity: 16,000 Pairs of Temperature and Humidity Readings
- 3½-Digit LCD Displays Real-Time Temperature and RH Readings, Device Working Status and “Memory Full” (OM-143 and OM-144 Only)
- Built-In Infrared Thermometer for Checking Temperature of Vents and Surfaces (OM-144 Only)
- Sampling Time and Hi/Lo Temperature and RH Alarm Setpoints are Selectable Using Included Software
- Software Also Calculates Dew Point and Wet Bulb Temperatures, and Mixing Ratio as GPP (Grains per Pound) or GPK (Grams per Kilogram)
- One-Click Exporting of Logged Data to Excel® or Word
- Long Battery Life (Up to One Year)
Product info
Measurement Type
Temperature, Humidity
Number of Measurements
2
Input Type
Internal
Maximum Samples
~16K
Display
None
Power
Battery
Data Interface
USB
Max Sampling Rate
10 sec
Product Specs
- Display Type LCD
- Display Size 3-1/2 Digit LCD
- Maximum Ambient Temperature 40°C (104°F)
- Minimum Ambient Temperature 0°C (32°F)
The OM-140 Series are low-cost, compact, battery powered temperature/humidity data loggers capable of unattended logging (recording) of the ambient temperature and relative humidity (RH) of an environment for days, weeks or months. The OM-144 data logger can also measure and optionally log surface temperatures spot-checked by a technician using the unit’s integral infrared (IR) thermometer. In addition, these units can also calculate and display absolute humidity levels in units of grains per pound (GPP) or g/kg. Also called mixing ratio, GPP is a more useful moisture metric than RH to water damage restorers. Using RH alone, a restorer might unknowingly introduce moist air—with a low RH but a high GPP—during a job’s drying phase.
Data logging can be started or stopped by pushing a button on the unit, eliminating the need to bring a laptop to the job site. After a data log has been captured and stored, it can be uploaded as a .txt file to any PC running the Windows® XP/7 or 8 operating system after plugging the data logger into one of the computer’s USB ports. The data logger’s internal flash memory is large enough to store 16,300 pairs of temperature and RH readings or for the model OM-144 nearly 10,000 sets of RH, ambient temperature and surface temperature readings. Included with the product is a mini-disc with the drivers needed to interface the unit to the computer, as well as software that can display a data log file as a table or graph and/or export it to Microsoft Excel. Exporting to Excel is recommended for sophisticated trending and analysis of humidity and temperature data and easy detection of unexpected excursions.
Rated 4 out of
5
by
Myrran from
Solid Logger (for the most part)
I have bought roughly 10 of these over the past 8 years. We use them for monitoring the temperature and humidity of a control room for Concrete testing. For the most part these are solid units. I have had a couple that had the screens go out on them after 5 years or so and the plastic gets discolored when exposed to sunlight. One had the temperature go out and it only lets you calibrate it slightly from the original settings. That said these generally work great with those few exceptions. The program for the PC is easy to use and understand. I will continue to purchase these as needed.
Date published: 2016-03-11
Rated 4 out of
5
by
AbudieyehM from
small size and great efficiency
My experience with this instrument is short but up to date it works very well.
Date published: 2016-03-05
Rated 5 out of
5
by
DR B from
So Far So Good
Been using two of these units for the past couple weeks and they are performing well. Temperature accuracy is as advertised (they give the exact same reading to the tenth of a degree C and these temps match other accurate devices I have. The relative humidity values vary by 0.5%, but this is in the advertised range. Very easy devices to set-up and to remove data..
Date published: 2016-12-26
Rated 4 out of
5
by
dusty from
works great.
easy to use.
had to guess where to get software to download data to but figured it out eventually.
USB connection works easily, but I would now pay a little mre for a wireless download option
Date published: 2018-03-14
Rated 4 out of
5
by
mccmfbgn from
Great value. Excellent product.
After 2 weeks of testing I'm going to give the OM-141 4 stars. If I could give it a 4.9 I would do that. I've only had one problem so far and it is not a showstopper.
I initially set the sampling rate to 30 seconds to collect and simulate a collection of many data-points, way more than we need), and in one week it had collected more data than the software seemed to download without a 'timeout' error being thrown. There needs to be a way to set the timeout value. When I put these in production we will set the sample rate to 12 hours, more than adequate for our needs, but I'd like to only download the data when I receive an alarm. if my freezers are doing well, I can foresee a timeout occurring if the time between downloads is sufficiently long to record a bunch of data-points.
In device setup, the sensitivity of the slider to set High/Low points is way too sensitive and I end up setting bounds slightly different from what I want. Not a big deal, but frustrating.
As I explore the software I am continually surprised by how many features are available. The best advice I can give to new users of the products is to "Read the **** manual".
Another problem we experienced had nothing to do with the device, but rather it was cockpit trouble: when we placed two of the device, I forgot to hit the start-button. I don't know what the solution would be on the OM141 to protect us from operator (me) error. Add that to your "would be a nice feature to have" list.
Date published: 2018-02-20
Rated 4 out of
5
by
1234 from
Good for general monitoring
We really like the OM-70 series for monitoring temperature and humidity during our testing. They work well and the software is easy to use.
The only issue we have is that they will not stay in calibration in the lower 10 degrees C of the published range and there is no adjustment to correct this. We calibrate them to 10 C above the published low range and they work well there.
Date published: 2017-11-16
Rated 4 out of
5
by
Professor Packrat from
Logger
Good device, intuitive SW. Good device, intuitive SW.
Date published: 2018-12-03
Rated 3 out of
5
by
Lumidity from
OK for low budget
I wish I had purchased the 143. The 141 is hard to tell if it's Power On or Not.
Date published: 2018-09-08
Can I log two separate temps continuously with this one unit? Since you discontinued the OM PL-TT I am looking for a replacement.
OM-72 has one internal and one external temperature sensor. Other options you can consider are OM-DVT4 or ISD-TC.
These are not direct replacements of the OM-PLTT, so please read the spec sheets before making your decision. If you have any question please contact our DAS team at das@omega.com or give us a call and ask for the Data Acquisition group.
Date published: 2019-11-21
I would like to know what is the maximum distance the logger can be from the sensors in the wired version? Is it possible to have the probes place approx. 20 meters from the device? will the information carry that far?
The OM-71 has a built in sensor it does not have a remote sensor. Take a look at the OM-74 that has a external thermocouple connection so you can use a remote probe and 20 meters is no problem for a thermocouple.
Date published: 2019-11-14
What is the resolution of this wireless data logger when connected to SC-GG-T-30-36-PP thermocouple? My need is 0.1 degree C measurement.
Hello Atul
The software displays exact numbers (ex. 73, it would not display decimal points).
Date published: 2019-11-07
What wireless receiver will work with the MWTC-D-J-915? For some reason I thought the receiver would come with it.
Hello Wells, receiver is sold separately. You can take a look at the MWTC-REC1-915 or MWTC-REC5-915 for your consideration:
https://www.omega.com/en-us/control-and-monitoring-devices/wireless-monitoring-devices/wireless-receivers/p/MWTC-REC1-915
https://www.omega.com/en-us/control-and-monitoring-devices/wireless-monitoring-devices/wireless-receivers/p/MWTC-REC5-915
Date published: 2019-10-11
Would this device be compatible with any type of probe . we are currently loooking for a device to measure compost temperature and humidity via some kind of probe. Thank you !
Hello Marc
As long as it is one of the following thermocouple types: J, K, T, E, R, S, B, C or N
Also the probe will need either a standard round prong or mini blade type connector attached at the end so it can connect to the transmitter.
Date published: 2019-08-28
What are the physical dimensions of the unit (length)? I would need to add the length of the thermocouple plug to find the overall length of the assembly. I need to verify if it will fit in our enclosure.
Hello Scott
The dimensions of the device are 82.5 L x 25.4 W x 15.2 H mm (3.25 x 1 x 0.6")
A mini-thermocouple connector's dimensions when connected to the transmitter are 20.6 (0.81") by 7.9 (0.31") and the width being 16.8 (0.66)
Date published: 2019-08-28
Dear Sir, We are interesting to purchase the product but we need some clarifications for this products, If the equipment is 24/7 working (Recorded) or only particular time working (Auto power off without disturbing the equipment? please advice.
When you are setting up the logger you can select either to stop on Memory Full or Memory Rollover for Continuous Recording.
Thank you.
Date published: 2019-07-22
I have the HH-309A temp mapping tool, it was working while I was running on windows 7 but not that I am running windows 10 the tool no longer shows a connection to the computer. Is there another program that I need to download?
Scott,
The problem is the driver. Not the program.
I have the HH-309A as well and the communication to the unit stopped working with Windows 10.
Luckily Windows 10 identifies my USB to serial cable (labeled USB-300 by Omega) as:
- CP2102 USB to UART serial connection.
But the provided driver by Microsoft did not work... nor the original driver by Omega.
I found the Silicon Labs CP210x driver to USB connection in this site: https://www.pololu.com/docs/0J7/all#2
I installed the X64 bit version of it and it now shows in the Windows Device Manager under Port (COM & LPT)
as: Silicon Labs CP210x USB to UART Bridge (COM1)
I re-installed the SE309 Software from the original mini-CD disk that came with the HH-309A unit and everything
is now working perfect.
Home this helped.
Adrian Crisci
Date published: 2019-07-19
CE