Honeywell
Housings for STT 3000
Series STT250
SMART TEMPERATURE TRANSMITTER
EN0I-6032 01/98 |
Housing Specifications and Dimensional Drawings |
OVERVIEW
Honeywell’s STT250 range of Temperature Transmitters can be supplied with a wide variety of enclosures for direct sensor head, 2” pipe or wall mounting. Available materials include Aluminium, Plastic, Cast Iron and 316 Stainless Steel.
Select the most suitable housing for lowest installed cost, lightweight, corrosive environments or for safety approvals - whichever is most important to match your requirements.
•All the housings for direct sensor head mounting include the facilities for spring loading of the STT250 transmitter module at a 33mm pitch (DIN 43729).
•When integral meter is required, choose the pipe or wall (field) mount housing.
For Flame-Proof EEx d applications, choose the Cast Iron housing and ensure that the sensor connection is sealed with an approved flametrap by ordering the sensor assembly with the transmitter and housing.
•For FM or CSA Explosion-Proof applications, choose the Aluminium or 316 SS field mount housing.
•The housings can be supplied with the STT250 transmitter installed by specifying from the STT250 Model Selection Guide included in Sales Specification Sheet EN0I-6031.
•If the temperature transmitter is pipe or wall mounted, a housing can be supplied with a sensor and a terminal block installed for connection to the remote mounted transmitter.
•Order sensor and thermowells for this direct sensor head mounting by referring to Specification EN0I-6033 (nonNorth America) and 34-44-29- 01 (North America).
Housing Specifications (in mm)
Aluminium Direct Head Mount
Housing
Suitable for general purpose or Intrinsically Safe applications. Dimensions shown in Fig. 1. Housing entry length = 41 mm
Material : LM24 Aluminium die casting. Sensor entry : 1/2”NPT
Cable / conduit entry : 1/2”NPT or M20x1.5.
Weight : 0.3kg (0.7 lb)
Paint cover : beige polyester/ epoxy hybrid.
Enclosure classification : IP65
Order as STT250 Table II selection A _ _.
|
1/2" NPT or M20 |
33 |
40 |
|
|
|
2 x M3 |
2 x M4 |
|
|
41 |
|
1/2" NPT |
B-B section |
A-A section |
Figure 1
Plastic Direct Head Mount
Housing
Suitable for lightweight installation in salt air environments and for general purpose or Intrinsically Safe installations.
Maximum temperature = 70° C (158° F) Dimensions shown in Fig. 2.
Housing entry length = 26,5 mm Material : ABS
Sensor entry : 1/2”BSP (equivalent to 1/2”NPT)
Cable/ conduit entry : M20x1.5 Colour : light beige
Weight : 0.1kg (0.2 lb) Enclosure classification : IP67
Order as STT250 Table II selection P _ _.
A |
|
|
85 |
33 |
|
57 |
1/2" NPT or M20 |
2 x M4 |
|
|
26.5 |
|
1/2" NPT |
A |
|
C-C section |
A-A section |
Figure 2
Cast Iron Direct Head Mount
Housing
Suitable for Flame-Proof EEx d applications when sensor with flame trap is included in total assembly.
Dimensions shown in Fig. 3. Housing entry length = 41 mm Material : Cast Iron
Sensor entry : 1/2”NPT Cable/ conduit entry : M20x1.5 paint cover : light beige Weight : 2.5kg (5.5 lb) Enclosure classification : IP68
Conforms to the applicable requirements of NEMA 7 and 9.
Order as STT250 Table II selection B _ _.
|
( |
104) |
|
2 x M4 |
|
|
|
33 |
111 |
1/2" NPT |
or M20 |
2 x M4 |
|||
41 |
|
|
|
|
|
1/2" NPT |
|
B-B section |
|
A-A section |
|
Figure 3
2 |
EN0I-6032 |
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