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Bimetal Thermometers by Trend and Wika

How to Identify Trend & WIKA Bimetal Thermometers

Example of Model Code   30 060 A 0 01 G 4 XX
30 - Basic Model Code, 3" back connected, resettable
060 - Stem Length, 6 Inches
A - Logo, Trend
0 - Scale Type, Dual Scale
01 - Range 50/500 °F & 10/260 °C
G - Crystal, glass
4 - Process Connection ½" NPT
XX - Option Code(s)

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CLICK ON PICTURES FOR LARGER IMAGE
Basic Model: Measure the diameter of the Dial in inches, Also note if there is a screw or "bolt head" in the back. This determines if it can be adjusted or "resettable". Also note the mounting of the stem. the choices are: back, bottom and adjustable angle. You may also find some with left or right hand mounting, but these are less common. Select the Model from the following Table.
General Specifications
Model Dial Size Connection Resettable

20

2"

Back

No

30

3"

Back

Yes

31

3"

Bottom

Yes

32

3"

Adjustable

Yes

33

3"

Back

No

34

3"

Bottom

No

50

5"

Back

Yes

51

5"

Bottom

Yes

52

5"

Adjustable

Yes

53

5"

Back

No

54

5"

Bottom

No

Stem Length: Measure the stem from the top of the threaded connection to the end of the stem. The standard lengths in inches are: 2.5, 4, 6, 9, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72. The length is specified as XXX; 2.5" = 025; 72" = 720
A - Trend
D -  Wika
Dial Logo: Use "A" for Trend and "D" for Wika
Scale: There are three types of scales  for the dial: Dual Scale, Fahrenheit only and Celsius (Centigrade). The Dual scale is most common but some consider it confusing and prefer the single scale. Use "0" for Dual, "1" for Celsius and "2" for Fahrenheit
Range: Select the two digit range code from the table on the right. Click on the table to see a larger version
A - Acrylic
L - Lexan ® (only on 2" & 3" dial)
S - Shatterproof Glass
G- Glass
Lens: Also know as the window or crystal. The standard is glass. Although tough it can break and leave fragments. Shatterproof glass may break but will not shatter into fragments. Acrylic and Lexan® are plastic lens and may replace the glass. Chemical fumes may fog the acrylic or Lexan®
0 - Plain
1 - 1/8" NPT
2 - 1/4" NPT
3 - 3/8" NPT
4 - 1/2" NPT
5 - G 1/2B
7 - Union Connection
Process Connection: By far the most common connection is 1/2" NPT. This connection has a diameter of approx 27/32 (0.840) inches. Other connections are: Plain (None), 1/8" NPT, 1/4" NPT, 3/8" NPT, G 1/2 B or a Union connection.
Click here to see dimensions for pipes
http://www.plumbingsupply.com/pipethreadsizing.html
Options:
SF - Silicon Fill Silicon Fill is normally used where there is severe mechanical vibration. The silicon dampens and lubricates the internal mechanism, reducing oscillation and premature wear. Max Temp: 50/500 °F. Only available on Models: 30, 31,32,50,51,52
ST: Sharp Tip Sharp Tip: The tip of the stem is normally round to flat. The sharp tip makes it easier to pierce things
  MM - Min/Max Pointer This is a manual indicator that is moved by the temperature indicator and shows the max. or min temperature reached. It is reset manually. Only available on Models 30 and 50
Connection Location. Bottom connected thermometers can be orders with the connection oriented to the left (LS), right (RS) or the top (TS)
Heavy Duty If the thermometer is going to be inserted into compost, meat, etc.  then a heavy duty stem is recommended. Option HD provides a 3/8" heavy duty stem with 2-1/2" x 1/4" OD sensitive tip, the HA option provide for a 3/8" heavy duty stem for the entire length and the HS option provides a 3/8" stem, reduced tip with a sharp point. The thermometer on the left is shown with the optional EZ-Insertion Handle.
EZ-Insertion Handle. This is recommended where the thermometer is inserted compost, meat etc. It saves using the dial as the handle P/N TA600-0163
  316 Stainless Steel. The case and stem is made of 304 SS. In some cases where a thermowell is not used, 316 SS is available for the wetted parts. Option code SS

 

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