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Environmental Wall-Mount Sensors and Transmitters

Environmental Wall Mount Sensors


Item# EWS-RTD-35FT

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $146.44
5-9 $139.12
10-24 $136.19
25-49 $130.33
50-99 $127.40
100+ $124.47

In stock

Lead Time ( If not in Stock): 7 weeks

Environmental Wall Mount Sensors EWS-RTD-35FT EWS-RTD-35FT
  • Thermocouple, RTD or Thermistor Sensor Models
  • Temperature, Temperature / Humidity and Barometric Pressure Transmitter Models
  • Low-Cost Miniature Design
  • Stylish Design Blends in Well with Your Office, Computer Room or Laboratory Décor

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Resistance or Output Type
Temperature Accuracy
Mounting Style
Electrical Connection Type
Maximum Temperature Measurement
Cable Length

Product Specs


OMEGA’s new low cost environmental wall mount sensors offer the perfect solution for keeping your office, computer room or laboratory’s décor looking great at an economical price. These miniature units come in 6 models that will interface directly with most process meters, controllers, recorders, data loggers and data acquisition systems. Thermocouple, RTD and Thermistor models come with 914 mm (36") leads standard. Temperature, Temperature/ Humidity and Pressure units come with user selectable industry standard 4-20 mA or 1-5 Vdc output.

Note: The EWS Series is for indoor applications only. They are not designed to be exposed to rain, snow or other extreme weather conditions.

Rated 2 out of 5 by from Not even close I've installed one of these so far. It read 84 F. I checked it with two accurate (expensive) and they both read 71 F. Apparently I need to calibrate it. I hope the rest are a little closer.
Date published: 2016-03-18
Rated 1 out of 5 by from Troublesome Product Constantly read high. Was told by customer support that the unit could handle 18 volts DC maximum despite the fact that the documentation said 24. Changed to a 15 volt supply and still had the same problem. Used a heat gun on the unit and noticed the board had a 90° hot spot on it. Maybe the RTD was picking some of that up. In the end I went with something else.
Date published: 2016-03-14
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We have a unit that is consistently reading low by more than 10 degrees. Is there a way to calibrate the sensor?

Asked by: David Wilson
Thank you for connecting with Omega. There is an adjustment labeled “P4” on the board for calibration at ambient. If you still have an issue after the adjustment try using a power supply with an output voltage between 8 and 18 volt dc.
Answered by: RD Engineer
Date published: 2019-11-17

Is the Omega Temperature Transmitter EWS-TX UL listed?

Asked by: PatK
Thank you for your inquiry! The EWS-TX is not UL listed
Answered by: Application Engineer JM
Date published: 2021-04-13

Does the EWS-RH come with the temperature and humidity sensors included? And also, do they have separate 4-20 mA analog outputs? (one for temperature and one for humidity).

Asked by: CarlosR
Thank you for your inquiry! Yes, the EWS-RH has internal temperature and relative humidity sensors. They also have separate 4-20mA outputs. Please find the EWS-RH Manual in the Quick Links tab and look to page 4 for wiring examples. Application Engineer CK
Answered by: Application Engineer CK
Date published: 2021-05-31
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