M12TX

RTD probes with 4 to 20 mA Analog Output and M12 Connector

Models In Stock

Programmable Transmitter
Molded Connector (IP67)
M12 Connection
4 to 20 mA Output = 0 to 150°C Default Setting

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M12TX

From ^TWD 6,326

Models In Stock

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4 Variations available

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Data Sheet

Product Overview

Accuracy Class A
Body Material Thermoplastic
Downscale 3.6 mA
Electrical Output 4 to 20 mA
EMC In accordance to EN 61326
Enclosure Ratings IP67
Enclosure Ratings Note IP65 and IP67 in accordance to IEC60529
Factory Setting 0 to 150°C/sensor break >21 mA (upscale)
Operating Temperature, Max 80 °C
Operating Temperature, Min -40 °C
Permissible Load 700
Permissible Load Note 700 @ 24 Vdc [RLo= (Vsupply-8.5)/0.020]
Process Connection Size N/A
Process Temperature, Max 500 °C
Process Temperature, Min -50 °C
Range Configurations Note It is possible set the input temperature range (span) by the M12TX-CONFIG-SETconfiguration kit (PC with OS Windows® required)
Relative Humidity, Max 1
Relative Humidity, Min 0%
Response Time < 50 ms
RTD Type 100 Ω Pt Sensor
Sensor Break Monitoring Note Selectable: Upscale (>21.0 mA) or downscale (<3.6 mA) action Sensor Short-Circuit: Fixed to downscale (<3.6 mA) action
Sensor Error Compensation Note Over 2 points (maximum 1% of span)
Series ID M12TX
Span, Min 50°C
Span Note 50°C (122°F) [if the zero value is set between one of these values: -40°C (-40°F), -20°C (-4°F), 0°C (32°F), 20°C (68°F), 40°C (104°F), the minimum span is 20°C (68°F) rather than 50°C (122°F)]
Supply Power Effects Negligible
Supply Voltage 8.5 to 32 Vdc
Temperature Influence, Max ± 0.3%
Temperature Influence Note Maximum of ± 0.3°C/25°C (77°F) or ± 0.3% of span/25°C (77°F)
Temperature Sensor Type RTD
Thermocouple Type N/A
Tmax. Electronic 80°C
Upscale 21 mA
Zero Setting Adjustable Range Any value between -50 to 50°C (-58 to 122°F)

Supported Applications

The Omega M12TX series consists of analog PC-programmable 2-wire transmitters with integrated Pt100 RTD sensors. Designed for space-limited areas, these compact mineral-insulated probes feature a molded IP67 connector and are intended for industrial temperature measurement applications where the electronic section must remain within -40 to +80°C.

Operating Conditions & Performance

The M12TX series provides a configurable input temperature range from -50 to 800°C via software, with standard factory defaults typically set for ranges such as 0 to 150°C. The Pt100 sensor (Pt-0.00385) meets Class A accuracy in accordance with IEC751 up to 300°C. Transmitter accuracy is specified at a maximum of ±0.2°C or ±0.2% of span.

Performance characteristics include:

Response Time (90%): <50 ms for the transmitter electronics.
Sensor Response Time (63.2%, test in water to IEC751): Less than 3.5 seconds for Ø3 mm probes and less than 13 seconds for Ø6 mm probes.
Ambient Temperature: -40 to +80°C (for the electronic section).
Process Temperature Limits: Up to 500°C (-58 to 932°F) is listed for standard operation; higher process temperatures up to 800°C are configurable but require adherence to Tmax./Tenv. graphs to prevent damage from heat transfer.
Humidity: 0 to 100% relative humidity.

Configuration Options

The series supports a wide envelope of configurations for probe diameter, insertion length, and output parameters. The transmitter is powered by an external supply or via the configuration interface during setup.

Sensor Element: 3-wire Pt100 (Pt-0.00385) with a sensor current of 0.5 mA; maximum wire resistance per wire is 20 Ω.
Output Signal: 4 to 20 mA analog output, non-isolated. Permissible load is 700Ω @24Vdc (calculated as R_load = (U - 8.5) / 0.022).
Power Supply: 8.5 to 32 Vdc with polarity protection.
Housing & Materials: Thermoplastic body for the transmitter section; probe sheath and thermowell options include AISI 316L stainless steel or compact mineral-insulated (MgO) cable construction.
Degree of Protection: IP65 and IP67 in accordance with IEC60529. The molded connector is M12x1 male, compliant with VDE0627.
Error Monitoring: Configurable sensor break monitoring (upscale >21 mA or downscale <3.6 mA) and fixed short-circuit action (downscale <3.6 mA).

Key Product Differences

Variants within the M12TX series are distinguished by probe diameter, insertion length, and specific model families.

Diameter Options: Probes are available in 3 mm (approx. 1/8") or 6 mm (approx. 1/4").
Length Configurations: Insertion lengths range from 100 mm to 1000 mm, with specific inch-based variants including 4", 6", 9", 12", 18", and 24".
Bending Radius: The compact mineral-insulated cable probe allows a minimum bending radius of three times the outer diameter (excluding the sensing tip).
Configuration Kit: Programming is performed using the M12TX-CONFIG-SET, which includes USB interface hardware and software for Windows 10.0 or higher to adjust range span, units (°C/°F/K), sensor error compensation, and transmitter identification.