Data Sheet
Temperature sensor
Type MBT 3250
Heavy-duty industrial temperature sensor.
Heavy-duty temperature sensors for controlling cooling water, lubrication oil, hydraulic oil and refrigeration plants within general industry and marine applications.
On a standardized Pt 100 or Pt 1000 element, which gives a reliable and accurate measurement. The sensor can also be delivered with NTC / PTC elements on request.
The MBT 3250 with changeable measuring insert is equipped with EN 175302-803-A Pg plug as standard.
The measuring insert is based on a silicone cable, which makes the sensor very resistant towards vibrations.
Features:
• Gaseous or liquid media, e.g. air, gas, vapour, water or oil
• Up to 200 °C media temperature
• Pt 100 or Pt 1000 sensing element
• 1 or 2 elements
• Can be used with 2 or 3 wire connections
• Gold plated male and female connector
• With interchangeable measuring insert
AI216786443991en-000201
Temperature sensor, Type MBT 3250
Product speci€cation
Technical data
Table 1: General data
Features |
Description |
|
|
Measuring range |
-50 – 200 °C |
|
|
Sensing element |
1 or 2 x Pt 100, 1 or 2 x Pt 1000 |
|
|
Protection tube |
ø8 × 1 mm |
|
|
|
|
|
|
Permissible media velocity |
Air |
25 m/s |
|
Water |
3 m/s |
||
|
|||
|
|
|
Table 2: Connection
Process connection |
G ¼ |
G ¼ A |
G ¾ A |
|
G ³⁄ A – M18 |
M24 |
|||
|
|
|||
Max. tightening torque |
25 Nm |
50 Nm |
100 Nm |
|
|
|
|
|
Table 3: Response time
|
|
|
|
Indicative response times |
|
|
|
Type |
Protection tube |
|
Water 0.2 m/s |
|
Air 1 m/s |
|
|
|
t0.5 |
t0.9 |
t0.5 |
t0.9 |
|
MBT 3250 with interchangeable measuring insert |
ø8 × 1 mm |
9 s |
33 s |
95 s |
310 s |
|
|
|
|
|
|
|
Table 4: Mechanical and environmental speci€cations
Features |
Description |
|
|
Sensor tolerance |
EN 60751 Class B: ± (0.3 + 0.005 × t) |
t = temperature of medium, numerical value |
|
|
|
|
|
Vibration stability |
Shock: |
100 g / 6 ms |
|
Vibrations: |
4 g sine function 5 – 200 Hz, measured acc. to IEC 60068-2-6 |
||
|
|||
|
|
|
|
Enclosure |
IP65 according to IEC 60529 |
|
|
Cable entry EN 175301-803 |
Pg 9, Pg 11 or Pg 13.5 |
|
|
|
|
|
Table 5: Materials
Features |
Description |
|
Protection tube in contact with media |
W.no. 1.4571 (AISI 316 Ti) |
|
Process connection |
W.no. 1.4404 |
(AISI 316 L) |
Extension length |
W.no. 1.4571 |
(AISI 316 Ti) |
Union |
Nickel plated brass |
|
Gasket |
Silicone |
|
Plug En 175301-803 |
PA 6.6 (max 125 °C) |
|
|
|
|
Table 6: Max. temperature and load
Max. temperature (Ext. length “None”) Plug EN 175301-803 |
Max. load on protection tube (ø8 × 1, ø10 × 2) acc. to EN 175301-803 |
|
<![if ! IE]> <![endif]>Danfoss 93Z99 |
L |
Insertion length |
|
Tp |
Temperature for electric plug |
|
|
|
|
|
Tm |
Media temperature |
|
TA |
Ambient temperature |
|
|
|
|
|
© Danfoss | Climate Solutions | 2021.02 |
|
|
AI216786443991en-000201 | 2 |