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EWSA
Air Temperature Sensor for Indoor or Outdoor Use
Models In Stock
- Designed for Indoor and Outdoor Use
- Screw Terminals for 4-Wire Pt100 Connection
- Optional Built in 4 to 20 mA Transmitter
- Rugged Sensor and Protection Tube Design

Product Overview
- Electrical Connection Screw Terminal
- Enclosure Ratings IP65
- Mounting M20 Cable Gland
- Number of Wires 4
- Probe Diameter 12.7 mm
- Probe Length 75 mm
- Standard Transmitter Scaling None
Description
OMEGA’s rugged air temperature sensors offer the perfect solution for temperature monitoring outdoors or in demanding environments.A 6 mm–diameter sheathed RTD probe is housed in the center of a 12.7 mm (0.5") outer protection tube which is drilled to improve airflow around the sensor. A 4-terminal connector block or 4 to 20 mA transmitter are housed in a tough aluminum alloy enclosure rated to NEMA 4X (IP65).
A cable gland is fitted on the opposite side of the enclosure to the sensor, suitable for cables from 2.5 to 6.5 mm (0.098 to 0.25") diameter.
SPECIFICATIONS
Dimensions:
Box: 80 W x 75 H x 58 mm D (3 x 2.9 x 2.3")
Sensor: 75 mm long x 12.7 mm OD (2.9 x 0.5")
Cable Entry: M20 Nylon gland for 2.5 to 6.5 mm (0.098 x 0.25") OD cable
EWSA-PT100:
Sensor Type: Thin film Pt100 class A 4 wire
Ambient Temperature Range: -50 to 100°C (-58 to 212°F)
Electrical Connection: Screw terminal block
EWSA-PT100-TX:
Ambient Temperature Range: -40 to 85°C (-40 to 185°F) at 10 to 90% RH non condensing
Standard Transmitter Scaling: 4 mA -25°C (-13°F), 20 mA at 75°C (167ºF)
Electrical Connection: Screw terminals, 2-wire
Power Supply: 10 to 30 Vdc, loop powered
Maximum Output Load: [(V supply-10)/20] kΩ eg 700Ω @ 24V
Show Ratings & Reviews
Rated 5 out of
5
by
Sheik from
it great
it great product Air Temperature Sensor for Indoor and Outdoor Use
Date published: 2021-10-28
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Will there be any RoHS compliance certificate for EWSA-PT100-TX published? How long should I expect to wait for the certification to be made public?
Asked by: Alex M
Thank you for your inquiry. Please send your request to temp@omega.com
Answered by: Application Engineer JB
Date published: 2020-04-03
EWSE-PT100 VS EWSA-PT100 Disregarding any spec sheets for the TR option: Can we wire the new EWSA-PT100 EXACTLY the same as we wire the now obsolete EWSE-PT100? Was the old EWSE-PT100 a 4-20 output and what output is the EWSA?
Asked by: Anonymous
Thank you for contacting Omega Engineering on your EWSA-PT100 question.
Please see below product manuals for the older discontinued EWSE-PT100 series and the new replacement EWSA-PT100 series. As you can see the electrical connections are the same for the EWSE-PT100 vs EWSA-PT100 RTD type output and the EWSE-PT100-TX vs EWSA-PT100-TX 4 to 20 mA type output.
EWSE-PT100 user manual including the 4 to 20 mA transmitter model EWSE-PT100-TX;
https://assets.omega.com/manuals/EWSE.pdf
EWSA-PT100 RTD type output;
https://assets.omega.com/manuals/M5732.pdf
EWSA-PT100-TX 4 to 20 mA type output;
https://assets.omega.com/manuals/M4561.pdf
Answered by: Jane
Date published: 2019-06-17
Can you provide dimensions on this part so we can design mounting methods before purchase?
Asked by: Mohamed Ghori
Dimensions:
Box: 80 W x 75 H x 58 mm D (3 x 2.9 x 2.3")
Sensor: 75 mm long x 12.7 mm OD (2.9 x 0.5")
Answered by: Temperature
Date published: 2025-01-27
What is the sampling frequency for this sensor? Is it capable of recording wind speed and direction values once ever second? (1Hz)
Asked by: Trevor42
Hi Daniel18
Thank you for the inquiry. This unit provides temperature indication via analog output only.
Best regards
OMEGA
Answered by: NorwalkAE_RS
Date published: 2021-07-06
EWSA-PT100-TX for this which cable is suitable??
Asked by: Narendra
Hi Narendra,
Thank you for the inquiry. Cable rated for low voltage process signals similar to our TX2-100
Specs
https://assets.omega.com/spec/PX_WIRE.pdf
Best regards,
OMEGA
Answered by: NorwalkAE_RS
Date published: 2020-09-24
Where can I find the wiring diagram for the EWSA-PT100-TX, specifically the Transmitter wiring with power requirements listed?
Asked by: Paul17
Thank you for your inquiry. You can refer to the TX12 Transmitter Manual for a wiring diagram for the EWSA-PT100-TX since that is transmitter inside.
https://www.omega.com/en-us/data-acquisition/signal-conditioners/head-mount-signal-conditioners/tx12-head-mnt-temp-tx/p/TX12
Answered by: Application Engineer CB
Date published: 2024-04-05
Has the EWSA-PT100 a protective cover for sensor using in outdoor of hazadus condition? I did not found it on your website and manual.
Asked by: Withgony
Unfortunately, EWSA-PT100 is not rated for outdoor and hazardous conditions
Answered by: Application Engineer MC
Date published: 2024-11-01
Hello, I am looking at the EWSA-PT1000, and it says optional built in 4-20ma transmitter. What part number(s) do I have to give my supplier to get this and the transmitter?
Asked by: Cmrch
Hi Cmrch,
Thank you for the inquiry. The transmitter is available for the EWSA-PT100 only. Part# EWSA-PT100-TX.
Best regards
OMEGA
Answered by: NorwalkAE_RS
Date published: 2023-03-06
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