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TX31-Series-TC-Tx
Head Mount Thermocouple Transmitter w/ Process Output
Models In Stock
TX31-Series-TC-Tx
From
C$
508.66
Models In Stock
Product Overview
- Calibration Trimpot/Switch
- Cold Junction Compensation ±2°C
- Diameter 45 mm
- Electrical Connection Screw Terminal
- Electrical Output 4 to 20 mA
- Height 27 mm
- Housing Material Aluminum, Epoxy, Polycarbonate
- Humidity Range 5 to 85% RH non condensing
- Input Type Thermocouple
- Isolation Galvanic, 1000 Vrms Input/output , continuous
- Linearity ±0.01%
- Operating Temperature, Max 70 °C
- Operating Temperature, Min -20 °C
- Output Detail 4 to 20 mA; Upscale < 26 mA, Downscale <3.8 mA
- Output Load 50 x (loop power - 12) Ω
- Probe Length 0 mm
- Repeatability ±0.01%
- Repeatability Note ±0.1% of voltage input span
- Response Time 200 ms
- RFI Effect < ±10% of span (5W, 470 MHz)
- Sensor Type Transmitter
- Series ID TX31-Series-TC-Tx
- Setup Controls Trimpot/Switch
- Sheath Material N/A
- Supply Power Effects ±0.01%/V
- Supply Power Note 12 to 32 Vdc; Reverse polarity protected
- Supply Power Type DC
- Supply Voltage 12 to 32 Vdc
- Temperature Coefficient ±0.02% /°C
- Temperature Input Range 0 to 600°C
- Weight 65 g
- Wire Gauge 22 to 12 AWG
- Zero Setting Adjustable Range 0.05
Supported Applications
The Omega Model TX31 is an analog, isolated 2-wire head-mounted temperature transmitter designed for process control, automation systems, and energy source management. It converts thermocouple inputs into a proportional 4 to 20 mA output current suitable for industrial signal conditioning.
Operating Conditions & Performance
The TX31 operates within an ambient temperature range of -20 to 70°C and supports humidity levels from 5 to 85 %, non-condensing. The unit provides galvanic isolation with a response time of 200 ms (0 to 90%). Accuracy is specified as ±0.1% of voltage input span for linearity error, with a temperature coefficient of ±0.02%/°C at Tamb = 5 to 50°C and repeatability of ±0.01% of voltage input span.
Measurement ranges vary by thermocouple type as documented in the series specifications:
- Type J: 0 to 600°C
- Type E: 0 to 600°C
- Type K: 0 to 1000°C
- Type T: 0 to 400°C
- Types R, S, and B: 0 to 1600°C
The transmitter accepts a power supply of 12 to 32 Vdc with reverse polarity protection. The maximum load resistance is specified as 50 x (loop power - 12) ohms or up to 250 Ω depending on configuration.
Configuration Options
The series supports multiple thermocouple types via a configurable model number guide: TX31-(*) where (*) is the inserted type J, E, K, T, R, S, or B. The unit features multi-range selectability through a 3 DIP-switch array and fine-tuning using ZERO and SPAN potentiometers.
Key configuration options include:
- Housing: Cast aluminum with epoxy coating and polycarbonate top cover (UL94-V0 grade), designed to fit DIN B connection heads for RFI immunity.
- Dimensions: 27 H x 45 mm Dia. (1.06 x 1.77").
- Electrical Connection: M3 screw terminals, nickel coated brass; compatible with AWG 12-22 wire.
- Fault Indication: Output signals upscale to < 26 mA or downscale to < 3.8 mA when a thermocouple wire is broken.
Available accessories include regulated power supplies (PSR-24S with screw terminal, PSR-24L with stripped leads) and an unregulated supply (PSU-93).
Key Product Differences
The TX31 series is distinguished by its thermocouple type selection. The model number suffix indicates the specific sensor compatibility: J, E, K, T, R, S, or B. While the physical housing and electrical interface remain consistent across types, the internal calibration ranges differ according to the selected thermocouple standard.
Span settings are adjustable via DIP switches (S1, S2, S3) which correspond to specific temperature spans for each type. For example, a Type K transmitter can be configured for spans ranging from 0-125°C up to 0-1000°C depending on the switch position.
