EL-WiFi-TH - Labfacility
EL-WiFi-TH
WiFi Temperature & Humidity Sensor
• 20 to +60°C (-4 to +140°F) temperature and 0 to 100% humidity
measurement range
• Wirelessly stream and view data on the FilesThruTheAir™ Cloud,
App or on a PC
• Easy sensor set-up using free PC software application
• View and analyse multiple sensors, including graphing of historic data
• Configurable high and low alarms with indicator
• Sensor memory stores all data even if WiFi is temporarily disconnected
The EL-WiFi-TH measures the temperature and humidity of the environment in which it
is situated. This sensor is typically accurate to ±0.3°C/±0.6°F (+5 to +60°C/+41 to +140°F)
and ±2.0%RH (20 to 80%RH @ 25°C). Data is streamed wirelessly over any WiFi network
and can be viewed on a PC using free software or on the FilesThruTheAir™ Cloud.
During configuration, the sensor will search for an existing wireless network whilst physically connected to the PC. It can then be
placed anywhere within range of the network. If the sensor temporarily loses connectivity with the network, it will log readings
until it is able to communicate again with the PC application or FilesThruTheAir™ Cloud (max 30 days at 10 second sample interval).
The sensor is IEEE 802.11b compliant, supports WEP, WPA/WPA2 encryption and enterprise networks.
EL-WiFi-TH has a protection rating of IP55. The unit is freestanding, but it can be attached to a wall or surface using the bracket
provided.
SPECIFICATIONS
ACCESSORIES
Minimum
Typical
Battery life
USB supply voltage
Maximum
>6
4.5
5
Vdc
+60 (+140)
°C (°F)
-20 (-4)
Logging period (user configurable)
10 sec
10 min
12 hrs
Transmission period (user configurable)
1 min
1 hr
24 hrs
Temperature measurement range
-20 (-4)
+60 (+140)
°C (°F)
0.5
°C
±0.3°C/±0.6°F
(+5 to +60°C/
+41 to +140°F)
Temperature accuracy
Humidity measurement range
0
Humidity measurement resolution
1.0
Humidity display resolution
1.0
Humidity accuracy (@ 25°C)
±2%RH
(10 to 90%RH)
Dimensions
USB Mains Power
Adapter for USA
PSU USB-UK
USB Mains Power
Adapter for UK
PSU USB-EU
USB Mains Power
Adapter for EU
EL-WiFi-Alert
Audible and Visual
Alarm for EL-WiFi
Data Logging
Sensors
°C (°F)
0.1 (0.2)
Temperature display resolution
PSU-5VDC-USB-USA
Months
5.5
Operating temperature range
Temperature measurement resolution
Unit
±0.8°C/±1.6°F
(-20 to +60°C/
-4 to +140°F)
°C/°F
100
%RH
%RH
%RH
±5.0%RH
(0 to 100%RH)
INCLUDED IN THE BOX
EL-WIFI WALL
BRACKET
Wall mounting
bracket for EL-WiFi
sensors
CABLE USB A-MICRO B USB Type A to Micro B
%RH
82 x 70 x 36mm (3.22 x 2.75 x 1.41”)
CALIBRATION CERTIFICATES NOW AVAILABLE
Lascar now offers a Traceable Calibration Certificate Service on Temperature Data Loggers. Using reference equipment
which has been calibrated by a UKAS/NIST
accredited laboratory and using apparatus traceable to national or
www.lascarelectronics.com/data-loggers
international standards. For more information please see www.lascarelectronics.com.
Issue 3 02/2017 Page 1 of 3
EL-WiFi-TH
WiFi Temperature & Humidity Sensor
EL-WiFi-WIN
Lascar’s WiFi software is available as a free download from:
www.lascarelectronics.com/software/easylog-wifi. Easy to install and use,
EL-WiFi-WIN allows easy connection of sensors to a WiFi network. The user
can select where data is stored - the PC or the Cloud.
EASYLOG CLOUD - Powered by FilesThruTheAir™
Interact with sensors via any internet-enabled device. Manage and monitor sensors,
access event logs and set up email alerts. A Cloud account is created during the WiFi
sensor set-up process using EL-WIFI-WIN with the choice of three account types depending
on which features are required.
FilesThruTheAir™ App
For users on–the-go, download the FilesThruTheAir™ app on the App Store and GooglePlay.
This app extends Cloud access and visibility to smartphone and tablet users, delivering an
enhanced user experience and features otherwise unavailable via the traditional mobile
web interface.
Download the latest version of the software free of charge from www.lascarelectronics.com/software/easylog-wifi
Battery Life and Power Supply
The battery can be recharged (unit must be between 0 - 40 °C) via a PC, a USB +5V wall adapter, or a portable USB battery pack
using the USB lead provided. It can also be permanently powered by a USB wall adapter or USB battery pack. Readings may be
affected while the internal battery is being charged. However, once charged, continued connection of the charger will have no
effect.
Battery life is dependent on: transmission period, WiFi encryption method, WiFi encryption key rotation frequency (determined by
the router/access point), signal strength between router/access point and WiFi device, presence volume and type of WiFi traffic
from other devices, sample rate and operating temperature.
Specifications liable to change without prior warning
www.lascarelectronics.com/data-loggers
Issue 3 02/2017 Page 2 of 3
EL-WiFi-TH
WiFi Temperature & Humidity Sensor
SENSOR ACCURACY & INFORMATION
EL-USB-2, EL-USB-2-LCD
EL-USB-2, EL-USB-2-LCD
EL-USB-2, EL-USB-2-LCD
Typical and maximal tolerance
in °C.
ΔT (°C) for temperature sensor
EL-USB-2,
EL-USB-2-LCD
±ΔT
2.0(°C)
± 2.0
± 1.5
± 1.5
± 1.0
± 1.0
± 0.5
ΔRH (%RH)
± 10
± 10
±8
typical accuracy
±± 10
8
±8
±6
±± 86
±6
±4
±± 64
±4
±2
±± 42
±2
±0
± 0.5
± 0.0
± 0.5
± 0.0
± 0.0
typical
accuracy
maximum
error
± 0.0-40
-40
-20
0
-40
20
-40
-20
0
20
-20
0
20
-20 600
40
8020
Temperature (°C)
40
60
80
Temperature (°C)
40
60
80
±± 20
Temperature
40
60 (°C)80
Temperature (°C) ± 0 0
100
90
100
80
90
70
80
60
70
50
60
40
50
30
40
20
30
10
20
0
10
0
70
70
typical accuracy
maximum error
20
10
20
30
60
80
40
60
20
40
40
10
50
20
30 40 50 60 70 80 90 100
Relative Humidity (%RH)
20
60 70 80 90 100
60 30
70 40
80 50
90 100
Relative Humidity (%RH)Relative Humidity (%RH)
60 70 80 90 100
Relative Humidity (%RH)
10
50
100
100
80
80
60
60
40
80-40
-20
-40
-20
Normal
Range
Max.Normal
Range
Range
Max.
Range
Normal
40 Range
20
Normal
20
0 Range
0 -40
200
80
typical accuracy
Operating conditions
80±3
100
0
typical
accuracy
maximum
error
typical accuracy
10
±3.5
±4
±3
±3.5
±3.5
±4
±3 ±3.5
±3 ±3.5
±3
±3 100
±3.5
90 ±3.5
±2.5
100
±3
±3.5 ±3 ±4
80
90
±2.5
±3 ±2.5
±3.5
±3.5
±3
±4
70
80 ±3 ±2.5 ±3.5 ±3 ±3.5
±2.5
±3 ±3.5
60
70
±3
±2.5
±3 ±2.5
±3
±3 ±3.5
50
±2
60 ±2.5
±3 ±2.5
40
50
±2 ±3
±2.5
±2 ±2.5
30
40
±2.5
±2
20
30
10
±2.5
20 ±3
0 ±3.5
±3
10
±3
±2.5
±3
±2.5
0 ±3.5
±3 40 50 60
0 10 20 30
±3.5
±3
±3
±2.5
Temperature
(°C)
0 10
0 10 20 ±3
30 40
50 20
60 30
70 40
80 50 60
±3.5
Temperature
(°C)
Temperature (°C)
0 10 20 30 40 50 60 70 80
Temperature (°C)
±3.5
Relative
Humidity
(%RH)
Relative
Humidity
(%RH)
Relative
Humidity
(%RH)(%RH)
Relative
Humidity
Typical accuracy of relative humidity measurements given in
100 ±3.5
±3
%RH for temperatures 0 to 80°C.
0
maximum error
maximum error
±0 0
0
30 40
Relative
Humidity
Relative
Humidity
(%) (%)
± 2.0
ΔT (°C)
±Δ10
RH (%RH)
ΔRH (%RH)
maximum error
± 2.0
± 1.5 maximum error
± 1.5 typical accuracy
maximum error
± 1.0
typical accuracy
± 1.0
± 0.5
Relative
Humidity
(%) (%)
Relative
Humidity
ΔT (°C)
and maximal tolerance at 25°C for relative humidity.
ΔTypical
RH (%RH)
-20
0
Max.
Range
Max.
Range
20
40
60
80
100 120
Temperature (°C)
20
40
60
80
100 120
0
80
100 120
Temperature (°C)
Temperature (°C)
Long
term 40
exposure
levels outside of the
0
20
60 to80humidity
100 120
Temperature offset
(°C) RH measurements
‘normal’ range may temporarily
20-40 40-20 60 0
(±3%RH after 60 hours). Once returned to less extreme
conditions the device will slowly return towards calibration
state.
When tracking changes in ambient conditions, the response time of the humidity sensor in your data logger is approximately
20 minutes to reach 90% of the reading. However, if you are measuring step changes in humidity (for example if calibrating the
product) it is advised that you leave the unit for up to four hours to ensure that it has enough time to settle at the new level.
It is worth remembering that the value of relative humidity is of course sensitive to temperature variation. As an example, at a
relative humidity of ~90%RH at ambient temperature, a variation in temperature of 1°C will result in a change of up to -5%RH.
Therefore when comparing multiple devices or calibrating them, any temperature variations must be considered.
www.lascarelectronics.com/data-loggers
Issue 3 02/2017 Page 3 of 3
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