TxIsoPack-USB is a fully isolated 4-20mA two-wire loop-powered temperature transmitter for in-head assembly. Complete sensor type selection and range configuration is done by connecting the device directly to a PC USB port — no other interface, special converter, or additional driver required. The isolated and linearised current output represents the sensor input signal according to the temperature sensor selected.
Why use isolated transmitters?
Isolated transmitters protect electrical instruments by eliminating ground loop effects and substantially reduce undesirable interferences and instabilities in sensor measurements.
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Novus TxIsoPack-USB Datasheet Download
Novus TxIsoPack-USB Manual Download
Technical Details
Input Sensor: configurable — thermocouples J, K, R, S, T; Pt100 (2, 3, or 4-wire, 0.170mA excitation current, α=0.00385 per IEC 751); Voltage 0-50mVdc (impedance >1MΩ)
Total Accuracy: max error 0.3% of max range for thermocouples; 0.2% of max range for Pt100 and voltage
Response Time: ≤500ms. Isolation: 1000Vac for 1 minute between input and output
Output: 4-20mA or 20-4mA current, two-wire type, linear to measured temperature. Output Resolution: 0.004mA (12 bits)
Power: 12 to 35 Vdc over the transmitter. Maximum series load: RL=(Vdc-12)/0.02Ω
Operating Temperature: -20 to 75°C. Relative Humidity: 0-90% RH
Electromagnetic Compatibility: EN 50081-2, EN 50082-2
Internal protection against reversed power voltage polarity. Internal cold junction compensation for thermocouples
Enclosure: ABS, 44mm diameter, 24mm max height. Communication cable: mini-B USB, 5 pins
Frequently Asked Questions
Do I need extra configuration hardware?
No — it connects directly to a PC USB port for sensor type selection and range configuration, with no separate interface or driver needed.
Does it fit inside a standard sensor head?
Yes — the compact 44mm diameter, 24mm max height ABS enclosure is designed for in-head assembly.
Can I switch between sensor types after installation?
Yes — the sensor type and range are fully configurable via USB, so you can reconfigure it for a different thermocouple, Pt100, or voltage input as needed.
Industry Applications
- Head-Mounted Sensor Retrofits — compact in-head assembly fits standard sensor head housings.
- Ground Loop Elimination — full isolation protects signal accuracy on installations with electric potential differences.
- Multi-Sensor Installations — configurable input handles most industrial sensor types in one part number.