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High accuracy Wireless Temperature and Humidity Data Loggers



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1-4 $191.75
5-9 $182.16
10-24 $178.33
25-49 $170.66
50-99 $166.82
100+ $162.99

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Lead Time ( If not in Stock): 7 Days

High accuracy Wireless Temperature and Humidity Data Loggers OM-EL-WIFI-TH OM-EL-WIFI-TH
  • OM-EL-WIFI-T Wireless Temperature Data Logger with Internal Temperature Sensor
  • OM-EL-WIFI-TH Wireless Temperature/Humidity Data Logger
  • OM-EL-WIFI-TP Single Channel and OM-EL-WIFI-DTP-PLUS Dual Channel Wireless Temperature Data Logger with Removeable Thermistor Probes
  • OM-EL-WIFI-TC Single Channel and OM-EL-WIFI-DTC Dual Channel Thermocouple Input Temperature Data Loggers
  • High Accuracy Models (OM-EL-WIFI-T-PLUS,
  • WiFi Capability and Integrated Display
  • Wireless Connectivity to PC Via WiFi
  • WiFi Connection Indicator
  • 802.11b Compliant
  • Easy Set-Up Using Free PC Software Download from omega.com
  • View and Analyze Multiple Data Loggers Using the PC Application, Including Immediate Graphing of Historic Data
  • Large Memory–Stores All Data Even if WiFi is Temporarily Disconnected
  • Rechargeable Internal Lithium Polymer Battery
  • USB Port Used for Recharging
  • Low Battery Indicator
  • Configurable High and Low Alarms with Indicator
  • Maximum and Minimum Readings

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Product Specs


The OM-EL-WIFI-TH wireless temperature/humidity data logger measures the temperature and humidity of the environment in which it is situated via internal sensors. The OM-EL-WIFI-TP (single channel) and OM-EL-WIFI-DTP-PLUS (dual channel) wireless temperature data loggers measures temperature via the included removable thermistor temperature probes. The OM-EL-WIFI-T wireless temperature data logger measures temperature via an internal sensor. The OM-EL-WIFI-TC (single channel) and OM-EL-WIFI-DTC (dual channel) wireless thermocouple input temperature data loggers accept a type J, K, T or N thermocouples. Data is transmitted wirelessly via a WiFi network to a PC and viewed using a free software package.

During configuration the data logger will search for an existing wireless network while physically connected to the PC. It can then be placed anywhere within range of the network. If the data logger temporarily loses connectivity with the network, it will log readings until it is able to communicate again with the PC application (max 60 days at 10 second sample interval for OM-EL-WIFI-TH) (max 120 days at 10 second simple interval OM-EL-WIFI-TP, OM-EL-WIFI-T and OM-EL-WIFI-TC (max 30 days at 10 second sample interval for OM-EL-WIFI-DTC and OM-EL-WIFI-DTP-PLUS). The range of the data logger can be increased by using WiFi extenders. The probe on the OM-EL-WIFI-TP and OM-EL-WIFI-DTP-PLUS can be used in a wide range of temperature situations e.g. manufacturing processes, cold storage and hot storage.

The OM-EL-WIFI Series are low powered battery devices. When configured using typical sampling periods (e.g. once every 60 seconds) the data logger will operate for over one year. The battery can then be recharged via a PC or USB 5V wall adaptor using the USB lead provided. The battery is safely charged when the unit is operating between 0 to 40°C (32 to 104°F). It is protected against charging outside this temperature range. Data logger readings may be inaccurate during battery charging.

With the OM-EL-WIFI Series the software installed on the PC will allow set-up, data logging and data review. Set-up features will include data logger name, °C/°F, sample rate, and high/low alarms. Once configured, historic data can be viewed via the graphing tool or exported into Excel. This software is available for free from OMEGA. The OM-EL-WIFI-TP (single channel) and OM-EL-WIFI-DTP-PLUS (dual channel) wireless temperature data loggers are supplied with removable thermistor temperature probes. The probe can be attached to a wall or other flat surface using the included mounting bracket (probe clips into the bracket).

Rated 4 out of 5 by from Does the job Bought this to remotely monitor temperature in a residence. Does essentially what I need it to. Would really like to see an API so I can integrate it into my network more fully. Don't really like to have this information in the cloud.
Date published: 2016-02-12
Rated 4 out of 5 by from Troublesome but Great We had to purchase a new, used computer as our existing ones operated on windows 10, and this product is only compatible with windows 7. This caused quite a bit of frustration, but after spending more money on a computer we did get your monitor working and it is doing the job we wanted it to do. So, having said all that, please let us know when you have a windows 10 version of the product, Thanks, Steven Baker
Date published: 2016-04-01
Rated 2 out of 5 by from Wi-Fi Functionality misleading This unit is supposedly designed for use on a Wi-Fi network, but it doesn't work with the most up to date WiFi encryption (WPA2). Omega happily handled the return, but this is obviously a significant design limitation of this device that should be stated upfront.
Date published: 2018-06-11
Rated 2 out of 5 by from Troublesome, Not Trustworthy, Fails Calibration I've had two of these units, the OM-EL-WIFI-TH and the TH+. They're easy to use and have a nice display. You have to pay $8/mo to monitor them, but the software is nice and has great features. However, if you need a unit that's calibrated this isn't for you. Initial calibration was great. Year 2: failed calibration until they charged it all the way and then it passed. Year 3: failed calibration regardless if it was fully charged or not. Don't buy this if calibration accuracy is important to you.
Date published: 2018-10-19
Rated 1 out of 5 by from Excellent Device for Loggin Data, bad connection I bought this data logger to record the temperatures of the freezer and refrigerator at my company. The set up is easy and the logger pages are great but the device does not stay synced with the PC and would never set up on the cloud. The customer support was great, which attempted to assist me with the issues through a couple of weeks of trouble shooting. Unfortunately I could not resolve these issues. The set up on the PC go through the setup great and the device connects to the network as well as sets up the computer but after a few data downloads by the device it looses connection and cannot reestablish the connection to the network. I get the blinking antenna of death. As for the cloud, I do get through the connection to the Newark but the device continues to fail in the final setup so I never did get the device linked to the cloud. Bottom line, the logging portion of the device is great but the connection side needs work. I will set my calendar reminder to download the data by way of USB every month to retain for records. So do not purchase this device if you would like a wireless data logger because it flat out does not operate properly, which I'm sure there are cheaper data loggers out there that just record with no WiFi or just network wired connection.
Date published: 2016-04-06
Rated 5 out of 5 by from Nice device The temperature and humidity device is a nice device and quality product
Date published: 2021-05-09
Rated 5 out of 5 by from CEO Excellent for control temperature and humidity in my pharmaceutical facility .
Date published: 2020-11-19
Rated 4 out of 5 by from Accurate, great data This is a great unit - we checked it against a two different test kits and it reads within posted limits. The wifi does drop out sometimes, so if you insist on 100% realtime data that will bug you, but it will eventually pick up and post all measurements. I love the graphs and statistics that the software shows.
Date published: 2020-04-15
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My WiFi network has many VLANs w/ different subnet. Devices are randomly placed in VLAN pools. Do the devices it have to all be on the same VLAN/Subnet in order to function?

Asked by: NetEnger
Hello The devices do need to be on the same VLAN/Subnet with the computer you want to communicate with in order to function.
Answered by: JA Engineer
Date published: 2020-10-07

do you provide certificate of calibration for Item# OM-EL-WIFI-TH? if yes, is there any additional fee?

Asked by: roro
Thank you for your question. You can order a unit with calibration certificate. Please see link to our website for OM-EL-WIFI-TH-NIST. https://www.omega.com/en-us//p/OM-EL-WIFI-TH-NIST
Answered by: Application Engineer PV
Date published: 2021-04-09

Do the units make noise? Is there an audible alarm?

Asked by: tdiscar
Thank you for your question. The unit alone only has visual alarm indication. If you require audible than you need to purchase OM-EL-WIFI-ALERT. https://www.omega.com/en-us/data-acquisition/data-loggers/ethernet-and-wireless-data-logging/om-el-wifi-alert-alarm/p/OM-EL-WIFI-ALERT
Answered by: Application Engineer PV
Date published: 2021-05-21

A previous question asked about the amount of time needed to acclimate or get to full accuracy. After these sensors have "acclimated", will they be sensitive enough to monitor small changes(0-2%) over a period of seconds/minutes?

Asked by: Zach 2
Hello Zach The unit runs via a WiFi connection, it is limited to the speed of the network. Reading intervals are as fast as one every ten minutes, as slow as one every ten hours, the resolution for humidity is 1% and for temperature is 0.1
Answered by: JA Engineer
Date published: 2020-01-09

How to switch units from °F to °C

Asked by: glenn A
Hi, to advise on your question, please see section 7.4 of the manual at the following link to change the units on your logger: https://assets.omega.com/manuals/M5381.pdf Thank you!
Answered by: Jane
Date published: 2019-06-25

Which thermometer would respond more quickly, the OM-EL-WiFi-TP or the OM-EL-WiFi-TC, and how long would it take to get a stable reading?

Asked by: Allan
Hello Allan, response time is at least 60 minutes before your readings are at full accuracy.
Answered by: PVDAS
Date published: 2019-11-16

Is there a labview driver for this instrument?

Asked by: Wad8
Hello, thank you for your inquiry. Unfortunately LabView drivers are not available for this series.Omega do have other options that include such drivers and we would love to discuss your application to help you find a suitable solution. Please give us call or send us your requirements to sales@omega.com.
Answered by: DA Engineer
Date published: 2020-05-14

is there a calibration certificate coming with instrument, and If so, is it traceable to ILAC-MRA standards?

Asked by: paulo
Hi, thanks for connecting with us. The calibration certificate is an additional purchase. If you order this at the time of purchase, it would come with the logger. Yes, our certificates are NIST traceable as well as traceable to ILAC-MRA standards. MDQ Calibration Laboratory is accredited to ISO 17025:2005 by PJLA which is an MRA Signatory of ILAC. The insignia for both ILAC-MRA and PJLA are included on our calibration certificates. Please contact us if you have any further questions.
Answered by: Jane
Date published: 2019-05-01
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USB power adaptor for recharging any OM-EL-WIFI series data logger (120 Vac input, 5 Vdc/1 A output via standard size USB type A connector)
28 In Stock
Thermistor probe extension cable, 1.5 m (5') for OM-EL-WIFI-TP and OM-EL-WIFI-TPPLUS
0 In Stock
Thermistor probe extension cable, 10 m (33')
3 In Stock
Thermistor probe extension cable, 5 m (16.5') for OM-EL-WIFI-TP and OM-ELWIFI-TP-PLUS
0 In Stock
Audible and visual alarm for OM-EL-WIFI Series data loggers
5 In Stock

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