Dwyer Instruments SERIES BTO Catalog Page

Ø3-1/4 [Ø82.55] OR

SERIES BTO

BIMETAL THERMOMETER WITH TRANSMITTER OUTPUT

Bimetal Stem with 4-20 mA Output, 3˝ or 5˝ Dial

TEMPERATURE

3-5/16
[84.14]

7-1/8

[180.98]

Ø5-1/4 [Ø133.35]

Ø3-1/16
[Ø77.79]

2-15/16

[71.61]

The Series BTO Bimetal Thermometer with Transmitter Output eliminates the
need for a separate thermometer and transmitter.

FEATURES/BENEFITS

• Thermometer and transmitter in one device

• Weatherproof construction

APPLICATIONS

• Boilers

• Compressors

• Thermal oxidizers

MODEL CHART
Model Dial Size Stem Length Range Model Dial Size Stem Length Range
BTO32551

BTO32571
BTO34051
BTO34071
BTO36051
BTO36071
BTO39051
BTO39071
BTO31251
BTO31271

Note: -40 to 160°F, 0 to 200°F, 50 to 300°F, and 50 to 400°F ranges available, contact factory for more information.

Thermometers

3˝
3˝
3˝
3˝
3˝
3˝
3˝
3˝
3˝
3˝

2.5˝

2.5˝
4˝
4˝
6˝
6˝
9˝
9˝
12˝
12˝

0 to 250°F
50 to 550°F
0 to 250°F
50 to 550°F
0 to 250°F
50 to 550°F
0 to 250°F
50 to 550°F
0 to 250°F
50 to 550°F

BTO52551
BTO52571
BTO54051
BTO54071
BTO56051
BTO56071
BTO59051
BTO59071
BTO51251
BTO51271

5˝
5˝
5˝
5˝
5˝
5˝
5˝
5˝
5˝
5˝

SPECIFICATIONS
THERMOMETER SPECIFICATIONS

Wetted Materials: 304 SS.
Housing Material: 304 SS.
Lens: Glass.
Accuracy: ±1% FS.
Temperature Limits: Ambient: -58 to

185°F (-50 to 85°C).

Dial Size: 3˝ or 5˝.
Process Connection: 1/2˝ NPT.
Resolution: 2°F (5°F for 400°F and

550°F models).
Weight: 1.95 lb.

2.5˝

2.5˝
4˝
4˝
6˝
6˝
9˝
9˝
12˝
12˝

USA: California Proposition 65
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

0 to 250°F
50 to 550°F
0 to 250°F
50 to 550°F
0 to 250°F
50 to 550°F
0 to 250°F
50 to 550°F
0 to 250°F
50 to 550°F

STEM

LENGTH

1/2

NPT

3/4 NPT
CONDUIT
CONNECTION

3-3/16
[80.96]

Ø1/4

[Ø6.35]

TRANSMITTER SPECIFICATIONS
Temperature Limits: Ambient: -58 to

185°F (-50 to 85°C).

Power Requirement: 10-33 VDC.
Output Signal: 4-20 mA.
Loop Resistance: 1045 Ω.
Power Consumption: 38 mA.
Enclosure Rating: NEMA 4X (IP66).