BT1 series temperature transmitters combine a Class B Pt100 sensing element and transmitter in a compact 316 stainless-steel assembly. Standard 1–4 inch probes and threaded process connections suit hydraulic systems, mobile equipment, industrial automation and oil-and-gas applications.

Choose 4–20 mA, voltage, ratiometric or custom voltage output, with CSA or ATEX application options as documented for the selected configuration. The configurator covers standard Celsius and Fahrenheit spans within the specified −40 to 200°C media limits. Availability is by inquiry.

BT1 Series Temperature Transmitters — Catalogue BT1/BT2/BT3 CSA Intrinsically Safe Transmitters — Installation Instructions

Select & Configure Model

Base Model #	Temperature Range	Output Options	Approval Options	Availability	Add to Cart / Configure Part #

BT1	−40 to 200°C media; factory-calibrated span	4–20 mA; voltage; ratiometric; custom voltage	CSA or ATEX; standard or hydrogen application	Inquire	Configurator

Sensing Element:

1 × Pt100 RTD, Class B

Probes:

Standard probe lengths: 1, 2, 3 or 4 inches; custom lengths by inquiry

Case Material:

316 stainless steel

Output(s):

4–20 mA; voltage; 0.5–4.5 V ratiometric; custom voltage. ATEX: current output only.

Accuracy:

±1% FS at 25°C; overall accuracy ±2% FS

Response Time:

Electrical response: <2 ms, per datasheet

Electrical Connections:

MIL-C-26482; M12x1 (S763-4); EN 175301-803-A; 4-conductor cable

Ambient Temperature :

−40 to 85°C (−40 to 185°F)

Humidity:

0–100% RH, non-condensing

Vibration:

20 g, three axes, to EN/IEC 60068-2-6

Temperature Range:

Media: −40 to 200°C (−40 to 392°F); calibrated span specified when ordering

Probe Diameter:

6 mm (0.24 in) sensing tip

Pressure rating:

10,000 psi maximum operating pressure; verify selected connection/application

Power Supply:

Current: CSA 12–27 VDC; ATEX 20–27 VDC. Voltage: 10–27 or 15–27 VDC, model dependent. Ratiometric: 5 VDC ±5%.

Stability:

±0.1% FS per year under reference conditions

Process Connection:

G 1/4 Form E, 1/4-18 NPT or 7/16-20 UNF standard ordering codes; other connections by inquiry

Protection:

IP65 or IP67, depending on electrical connector

Storage Temperature:

−40 to 85°C (−40 to 185°F)

Shock:

1 m free fall to EN/IEC 60068-2-32

Approvals:

CSA and ATEX/IECEx options, configuration dependent; verify exact device marking and applicable certificate

Ordering and configuration

Select the approval/application, output, lower and upper range limits, temperature unit, probe length, process connection and electrical connection. The upper range limit must exceed the lower limit. The catalogue example is BT1CS-5-KZF-L1P8T2. ATEX selections are restricted to 4–20 mA current output by the documented electrical-data table.

For voltage and custom-voltage outputs, state the required signal span in the RFQ message. CAN J1939, CANopen, Kelvin units, custom probes/connections and the catalogue’s −55/−50°C endpoints require confirmation before ordering; complete ordering information is not supplied for all of these options. Standard configurable process codes are P1, P3 and P8; contact Mod-Tronic for 9/16-18 UNF or custom connections.

Application and approval limits

Media limits are −40 to 200°C and ambient limits are −40 to 85°C in the detailed specifications. The catalogue headline also lists ranges down to −55°C; confirm any application below −40°C with Mod-Tronic. Approval markings, permitted gas groups, supply/entity limits and connection requirements depend on the exact device and applicable certificate/control drawing. An external intrinsic-safety barrier is required where specified. The attached installation manual covers CSA intrinsically safe BT1/BT2/BT3 versions.