CMA BT01 User guide

BT01
CMA
Brand
CMA
Model
BT01
Type
User guide

CMA BT01 is a versatile temperature sensor designed for precise temperature measurements in various environments. With a measurement range of -40°C to 140°C, it can monitor both indoor and outdoor temperatures, making it ideal for weather monitoring and climate studies. Its ability to measure freezing and boiling water accurately makes it suitable for experiments related to phase changes and heat transfer. Additionally, CMA BT01 can be used to study endothermic and exothermic reactions, investigate specific heat, and conduct insulation and solar energy experiments.

CMA BT01 is a versatile temperature sensor designed for precise temperature measurements in various environments. With a measurement range of -40°C to 140°C, it can monitor both indoor and outdoor temperatures, making it ideal for weather monitoring and climate studies. Its ability to measure freezing and boiling water accurately makes it suitable for experiments related to phase changes and heat transfer. Additionally, CMA BT01 can be used to study endothermic and exothermic reactions, investigate specific heat, and conduct insulation and solar energy experiments.

TEMPERATURE(SENSOR&BT01!
USER’S!GUIDE!
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CENTRE FOR MICROCOMPUTER APPLICATIONS
http://www.cma-science.nl
2!|!BT01!Temperature!Sensor!User’s!Guide!!
Short!description!
The!CMA!BT01!Temperature!sensor!is!a!general-purpose!temperature!sensor!that! can! be!
used!to!measure! temperature! in ! liquids!(water,! mild! acidic! solutions)!and! air .! The!sensor!
can!record!temperature!in!the!range!of!-40°C!to!140°C.!!The!sensing! element!of!the!sensor!
is!20!kΩ!NTC!thermistor,!which!is!positioned!in! a! stainless! steel! tube.! ! The! thermistor!is!a!
variable!resistor!whose!resistance!decreases!nonlinearly!with!increasing!temperature.!The!
best-fit! approximation! of! this! non-linear! characteristic! is! the! so-called! Steinhart-Hart!
equation.!!
Sensor!recognition!
The! sensor!has!a !built-in!resistor!for !automatic!sensor!identification.!The!sensor!information,!!
its! name,! measured! qu antity,! unit! an d! calibration! is! automatically! read! from! the! system!
software.! If! your! Temperature! sensor! is! not! automatically! detected! by! an! interface! you!
have!to!manually!set!up!your!sensor!by!selecting!it!from!the!Coach!Sensor!Libra ry.!!
Calibration!!
The!Temperature!sensor!is!supplied!calibrated!in!degrees!Celsius!°C.!Resistance!20!kΩ!NTC!
thermistor!decreases!nonlinearly!with! increasing!temperature.!The!best-fit!approximation!of!
this!non-linear!characteristic!is!the!so-called!Steinhart-Hart!equation:!!
T!=![K
0
!+!K
1
*ln(R)!+!K
2
*!(ln(R))
3
]
-1!
-!273.15!
where!T!the!temperature!in!°C,!and!R!the!measured!resistance!in!Ω,!!
K
0
!=!1.02119E-03;!K
1
!=!2.22468E-04;!K
2
!=!1.33342E-07!
!
For!better! accuracy!the!pre-defined!calibration!can!be!shifted.!Use!the! Set$to$zero!option!to!
zero!the!values!when!there!is!no!air!flow!in!the!tube.!
Practical!information!!
The! Temperature! sensor! can! be! used! in! a! similar! way! as! a! thermometer.! Here! are! some!
general!guidelines!for!usage:!
• Do!not!use!the!sensor!to!measure!temperatures!higher!than!150°C,!this!may!damage!
the!sensor.!
• Keep!the!sensor!cable!away!from!the!heat!source.!!
• Do!not!put!any!part!of!the!sensor!in!a!flame!or!on!a!hot!plate.!
• Avoid!submerging!the!sensor!probe!beyond!the!stainless!steel!part.!The!handle!is!not!
waterproof.!
• Always!clean!the!sensor!thoroughly!after!use.!
• The!sensor!tube!is!constructed!from!stainless!steel,!which!has!a!high!resistance!to!
corrosion!from!weak!acids!and!alkalis.!Some!environments!e.g.!salt!water!may!cause!
some!discoloration!of!the!stainless!steel!tube!but!this!will!not!affect!the!senso r’s!
performance.!!
• Do!not!use!this!sensor!in!a!strong!acid!or!strong!base.!A!chemical!reaction!may!cause!
permanent!damage.!!
!
BT01!Temperature!Sensor!User’s!Guide! |!3!
• The!sensor!can!be!left!in!an!alkaline!solution,!such!as!NaOH,!for!up!to!48!hours,!with!
only!minor!discoloration.!We!do!not!recommend!using!the!sensor!in!basic!solutions!
which!concentration!is!greater!than!3!M.!
• The!maximum!length!of!time!recommended!for!exposure!to!an !acid!is!d epen den t!on !
the!acid’s!concentration.!In!general!we!do!not!recommen d!sen sors!b e!left!to!so ak!in !
acids!of!between!1!-!3!M!concentration!for!longer!than!48!hours.!The!exceptions!to!this!
are!Hydrochloric!acid!HCL!and!Sulp hu ric !a ci d!H
2
SO
4
.!The!maximum!exposure!time!for!
these!acids!are:!!
!
Acid
Maximum
Exposure Time
1 M HCL
2 M HCL
3 M HCL
20 minutes
10 minutes
5 minutes
1 M H
2
SO
4
2 M H
2
SO
4
3 M H
2
SO
4
48 hours
20 minutes
10 minutes
!
Suggested!experiments!!
The!CMA!Temperature!sensor!BT01!can!be!used!in!a!variety!of!experiments,!such!as:!!
• Monitoring!indoor!and!outdoor!temperatures.!!
• Monitoring!freezing!and!boiling!water.!
• Monitoring!endothermic!and!exothermic!reactions.!
• Specific!heat!experiments.!
• Insulation!investigations.!!
• Solar!energy!studies.!!
!
4!|!BT01!Temperature!Sensor!User’s!Guide!!
Technical!Specifications!
!
Sensor$kind$
Analog,!generates!an!output!voltage!between!0 – 5 V !
Measurement$range!
-40!°C!!..!!140!°C!
Measuring$element!
20!kΩ!NTC!Thermistor;!non-linear!
Calibration$$
(Steinhart-Hart$equation)$
$
Coefficients!
T!=![K
0
!+!K
1
*ln(R)!+!K
2
*!(ln(R))
3
]
-1!
-!273.15!
T!the!temperature!in!°C,!!
R!the!measured!resistance!in!Ω!
K
0
!=!1.02119E-03;!K
1
!=!2.22468E-04;!K
2
!=!1.33342E-07!
Accuracy!
±!2°C!at!-40!°C!
±!0.6!at!30!°C!
±!1.8°C!at!140!°C!
Maximum$temperature$that$sensor$
can$tolerate$without$damage!
150!°C!
!
Response$time$$
(time$for$90%$change$in$reading)!
10!seconds!(in!water!with!stirring)!!
270!seconds!(in!still!air)!
80!seconds!(in!moving!air)!
!
!
!
!
!
!
!
!
!
!
Warranty:!!
The! Temperature! sen sor! BT01! is! warranted! to! be! free! from! defects! in! materials! an d!
workmanship! for! a! period! of! 12! months! from! the! date! of! purchase! provided! that! it! has!
been!used!under!normal!laboratory!conditions.!This!warranty!does!not!apply!if!the!sensor!
has!been!damaged!by!accident!or!misuse.!!
!
Note:! This$ product$ is$ to$ be$ used$ for$ educational$ purposes$ only.$ It$ is$ not$ appropriate$ for$
industrial,$medical,$research,$or$commercial$applications.$$ $ $ $ $
Rev. 16/01/2020
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CMA BT01 User guide

BT01
CMA
Brand
CMA
Model
BT01
Type
User guide

CMA BT01 is a versatile temperature sensor designed for precise temperature measurements in various environments. With a measurement range of -40°C to 140°C, it can monitor both indoor and outdoor temperatures, making it ideal for weather monitoring and climate studies. Its ability to measure freezing and boiling water accurately makes it suitable for experiments related to phase changes and heat transfer. Additionally, CMA BT01 can be used to study endothermic and exothermic reactions, investigate specific heat, and conduct insulation and solar energy experiments.

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