The TXHUI range of low-cost, loop powered, isolated, microprocessor based linearised transmitters have, as standard, a universal input that accepts RTD (Pt100 or Pt1000) and Thermocouple (Types K, J, T, N, E, R, S, B) inputs.
We can offer the following pre-configuration options (note: temperature range must fall within minimum/maximum range for an input)
Input Type | Minimum Temperature | Maximum Temperature |
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Thermocouple Type K | -200°C | +1372°C |
Thermocouple Type J | -100°C | +1200°C |
Thermocouple Type T | -200°C | +400°C |
Thermocouple Type N | -180°C | +1300°C |
Thermocouple Type E | -100°C | +1000°C |
Thermocouple Type R | -50°C | +1760°C |
Thermocouple Type S | -50°C | +1760°C |
Thermocouple Type B | 0°C | +1820°C |
Pt100 3-wire | -200°C | +850°C |
Pt1000 3-wire | -200°C | +850°C |
The transmitters can be supplied configured to suit your application requirements (simply enter your configuration requirements above) or can be easily configured yourself using the
TX-USB Configuration Kit which is available separately. Simply install the software (which is available for free download from our website), connect the USB configuration module and plug the lead into the transmitter. The software will then provide the necessary prompts.
The TXHUI is a similar specification to the
TXHU transmitter, but with the following additional features:
Zero span pot
LED status indicator
Improved Thermocouple input accuracy (Types K, J, T, N, E: < ±1°C; Types R, S, B: < ±2°C)
Isolation test voltages between input/output
3750V AC for 1 minute
Operating temperature: -20°C to +85°C
Technical Details (Common) |
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Output | 4~20mA, 2-wire (loop powered) |
Power Supply | 10-36V DC |
Output Load Resistance | 700Ω at 24V DC (50Ω/V above 10V DC) |
Maximum Output Currrent | Limited to < 28mA (emission & immunity) |
Accuracy | < ±0.03% FSO typical |
Ambient Drift | < ±0.003%/°C FSO typical |
Noise Immunity | 125dB CMRR average (2.0kV DC limit) |
R.F. Immunity | <1% effect FSO typical |
Reponse Time | 400ms typical (10-90% 300ms typical) |
Sensor Break Output Drive | Function high upscale/low downscale |
USB Programmable Zero | 0 to ±99% of the span |
Operating Temperature | -20°C to +85°C |
Storage Temperature | -20°C to +100°C |
Operating Humidity | 5-85% RH max (non-condensing) |
Dimensions | 44mm (W) x 44mm (H) x 23mm (D) |
EMC Compliance | Emissions (EN 61326) |
Immunity (EN 61326) |
Safety (EN 61010-1) |
RTD Input Specifications |
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Input | Pt100 or Pt1000 DIN 3-wire type (2-wire can be used with offset calibration) |
Sensor Current | 0.15mA nominal |
Lead Wire Resistance | Pt100: 10Ω/wire max. |
Pt1000: 5Ω/wire max. |
0.02% FSO offset error per Ω of lead resistance |
Accuracy | ≤ 0.3°C |
USB Programmable Span | -200°C to +850°C |
Linearity (Pt100) | 0.02% FSO for span inputs ≤ +200°C |
0.1% FSO for span inputs ≤ +850°C |
Linearity (Pt1000) | 0.02% FSO for span inputs ≤ +200°C |
0.2% FSO for span inputs ≤ +520°C |
Thermocouple Input Specifications |
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Thermocouple Types | K, J, T, N, E, R, S, B |
Input Impedance | 1MΩ min |
Thermocouple Lead Resistance | 100Ω max |
Cold Junction Compensation | -20°C to +90°C |
Accuracy | Types K, J, T, N, E: < ±1°C |
Types R, S, B: < ±2°C |
Temperature Drift | Types K, J, T, N, E: < ±0.05°C |
Types R, S, B: < ±0.2°C |
CJC Error | < ±1°C |