Skip to search Skip to main content Skip to navigation

Call us at 1-888-826-6342

We noticed you are from . Visit your local site for regional offers and live support.

Head Mount Thermocouple Transmitter w/ Process Output

Isolated Miniature Transmitters


Item# TX31-J

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 C$418.51
5-9 C$397.58
10-24 C$389.21
25-49 C$372.47
50-99 C$364.10
100+ C$355.73

In stock

Lead Time (If not in stock): 9 weeks
Isolated Miniature Transmitters TX31-J TX31-J
  • Ultra-Low Profile Design
  • Multi-range Selectable
  • Galvanic Isolation
  • Long Term Stability

TX31-J Model Options

View all models

Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Input Type
Input Ranges
Input Class
Output Type
Output Class
Supply Voltage Type

Please check out our newer model 2-wire transmitter TX13 Series with more advanced features at a lower price.

The Model TX31 is an analog, isolated 2-wire head-mounted temperature transmitter that converts thermocouple input to the voltage, which is generated by the thermocouple sensor, linear, and highly accurate 4 to 20 mA output current.

The transmitter comes in a variety of applications such as process control, automation system, and energy source management. The TX31 is performed by means of a DIP-switch array for coarse range setting, and 2 multi-turn potentiometers (ZERO and SPAN) which are used for the final finetuning.

The TX31 is housed in a metal enclosure with a plastic top cover, fitting into DIN B connection heads, providing excellent RFI immunity. The TX31 accepts low level signal from the thermocouple, filtered, amplified, and converter process current to reduce susceptibility transients and noise operations while allowing the same 2 wires to carry the transmitter power and output current signal simultaneously.

Specifications (VLOOP = 24 VDC, TAMB =23±2°C, RLOAD = 250 Ω)
Output: 4 to 20 mA; Upscale < 26 mA, Downscale <3.8 mA
Loop Power: 12 to 32 Vdc; Reverse polarity protected
Input Thermocouple:Types J, K, E, T, R, S, or B
Supply Voltage Effect: ±0.01%/V
Temperature Coefficient: ±0.02% /°C (Tamb = 5 to 50°C )
Repeatability: ±0.01% of voltage input span
Linearity Error: ±0.1% of voltage input span (not temperature input)
Galvanic Isolation: Input/output 1000 Vrms, continuous
Cold-Junction Compensation: ±2°C max (Tamb = 5 to 50°C)
Load Capability: 50 x (loop power - 12) Fine Adjustment: 5% of zero & span
RFI effect (5W, 470 MHz): < ±10% of span
Response time (0 to 90%): 200 ms
Housing Material: Cast aluminum with epoxy coating and polycarbonate, UL94-V0 grade
Connection: M3, nickel coated brass; 22 - 12 AWG
Operation Environment: -20 to 70°C; 5 to 85 %, non-condensing
Dimensions: 27 H x 45 mm Dia. (1.06 x 1.77")
Weight: 65 g (2.3 oz)
loading all models
loading all reviews
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 9ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;
loading all QA
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 27ms
  • bvseo-msg: The resource to the URL or file is currently unavailable.;

Related Categories

Save Configuration