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Temperature Measurement
Siemens temperature measurement products that provide a 4–20 mA output signal, here are the common types used in industrial process control:
🔥 1. Temperature Transmitters (4–20 mA)These devices take a temperature sensor input (like a thermocouple or RTD) and convert it into a standard 4–20 mA output for PLC/SCADA.
Siemens Temperature Transmitter Examples-
Siemens SITRANS TF310
→ Universal temperature transmitter
→ Accepts RTD or Thermocouple input
→ Outputs 4–20 mA + HART -
Siemens SITRANS TF320
→ Two‑wire transmitter for field installation
→ Output: 4–20 mA -
Siemens SITRANS TF400
→ Loop powered transmitter
→ Suitable for harsh environments
👉 These transmitters mount near the sensor or in a control panel and are used when you need accurate, scalable temperature signals in a control system.
📍 2. Temperature SensorsTemperature sensors themselves (e.g., thermocouples or RTDs) do not output 4–20 mA directly — they produce a small voltage or resistance change. You must use a transmitter to convert that to a 4–20 mA industrial signal.
Examples:
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PT100 RTD (platinum resistance sensor)
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Thermocouple (types J, K, T, etc.)
These feed into a transmitter like the SITRANS TF series.
📊 How 4–20 mA Works for Temperature-
4 mA = Lowest measurement (e.g., 0°C)
-
20 mA = Highest measurement (e.g., 500°C)
The range can be set to match your sensor and process requirements.
The 4–20 mA signal also supplies power to the transmitter in two‑wire systems.
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4–20 mA Loop
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Two wires carry the 4–20 mA signal.
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Often HART is combined with 4–20 mA for diagnostics/configuration.
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Boilers
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Furnaces
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Heat exchangers
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Chemical processes
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Power plants
Head Mounted Temperature Transmitters
| Input Type | Ω, 4–20 mA, RTD |
| Output Signal | 4–20 mA |
| Head Type | Form A |
| Other Input Types | : PT-100 RTD K-TYPE |
| Sensor Input | Pt100, Pt1000 |
| Configuration | PC Configurable |
| Isolation | Isolated |
| Power Source | OUTPUT : 4 - 20 MADC --------- 2 WIRE |
| Model Name/Number | T15.H |
| Brand | WIKA |
APPLICATIONS
· PROCESS INDUSTRY
· MACHINE BUILDING AND PLANT CONSTRUCTION
SPECIAL FEATURES
· FOR THE CONNECTION OF PT100 AND PT1000 SENSORS IN A 2-, 3- OR 4-WIRE CONNECTION
· FOR THE CONNECTION OF REED CHAINS IN A POTENTIOMETER CIRCUIT
· PARAMETERISATION WITH THE WIKASOFT-TT CONFIGURATION SOFTWARE AND ELECTRICAL CONNECTION VIA QUICK CONNECTOR MAGWIK
· CONNECTION TERMINALS ALSO ACCESSIBLE FROM THE OUTSIDE
· ACCURACY < 0.2 K (< 0,36 °F) / 0.1 %
View Complete details
TEMPERATURE MEASUREMENT- SITRANS TH200
| Input Type | RTD + TC |
| Sensor Type | RTD |
| Output Signal | 4–20 mA HART |
| Mounting Type | Head Mount |
| Operating Range | 0-100 DEG,C |
| Sensor Input | N Type, Pt1000, K Type, Pt100, J Type, E Type, R Type, T Type |
| Measuring Range | 0–1200°C |
| Isolation | Isolated |
| Usage/Application | The SITRANS TH200 and SITRANS TH300 transmitters can be used in all industries |
| Accuracy | 0.075 |
SITRANS TH200 is designed to support all common RTDs, thermocouples, resistance and millivolt sensors. Setup is quick and easy with the transmitter modem and SIPROM T software. This configuration tool can be downloaded for free. Unique user-friendly details are implemented, one of them being the direct readout of the output current with a multimeter without having to open the 4 … 20 mA loop. A red/green LED indicates the device status at a glance.
Benefits-
Measures temperature with a linear output signal
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High accuracy across entire ambient temperature range
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Reduces plant noise
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Alarm signal for sensor break or short-circuit according to NAMUR 43
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Electro magnetic compatibility (EMC) according to DIN EN 61326 and NE21
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Saves expensive compensation cables with its internal reference junction
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Galvanic insulation for accuracy and safety in thermocouple applications
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Single- or dual-point trim
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Custom characteristic curve for application of non-standard sensors
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Difference- and average- measurement
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Explosion protected variants for US, Canada and Europe
-
Rugged design, fully potted electronics
View Complete details
SITRANS TH200
| Input Type | 4–20 mA, mV, Ω, RTD, RTD + TC, Thermocouple |
| Output Signal | 4~20 mA |
| Head Type | Form A |
| Input Types | Temperature |
| Operating Range | -200 TO 600 |
| Sensor Input | B Type, T Type, K Type, Pt1000, E Type, S Type, R Type, Pt100, J Type, N Type |
| Configuration | HART Config |
| Isolation | Isolated |
| Usage/Application | RTDs, thermocouples |
| Model Name/Number | TH200 |
SITRANS TH200 is designed to support all common RTDs, thermocouples, resistance and millivolt sensors. Setup is quick and easy with the transmitter modem and SIPROM T software. This configuration tool can be downloaded for free. Unique user-friendly details are implemented, one of them being the direct readout of the output current with a multimeter without having to open the 4 … 20 mA loop. A red/green LED indicates the device status at a glance.
Benefits-
Measures temperature with a linear output signal
-
High accuracy across entire ambient temperature range
-
Reduces plant noise
-
Alarm signal for sensor break or short-circuit according to NAMUR 43
-
Electro magnetic compatibility (EMC) according to DIN EN 61326 and NE21
-
Saves expensive compensation cables with its internal reference junction
-
Galvanic insulation for accuracy and safety in thermocouple applications
-
Single- or dual-point trim
-
Custom characteristic curve for application of non-standard sensors
-
Difference- and average- measurement
-
Explosion protected variants for US, Canada and Europe
-
Rugged design, fully potted electronics
View Complete details
Temperature switch Model TSM-550
| Sensing Temperature Range | -50–150°C |
| Switch Type | SPDT |
| Contact Rating | 10 A at 250 V AC |
| Temperature Range | 10 to 300 Deg C |
| Current Rating | 15A |
| Material | Brass |
| Sensor Type | Capillary |
| Mounting Type | Bulb and Capillary |
| Enclosure Protection | IP54 |
| Cable Length | Capillary length 3 to 8 meters |
Applications
· Pump, filters
· Lubrication system, hydraulic system
· HVAC
· Circuit breakers
· Turbines
View Complete details
FIELD MOUNT TEMPERATURE TRANSMITTER
| Measured Parameter | Temperature |
| Output Signal | 4–20 mA HART |
| Display | LED |
| Operating Range | 0 -600 |
| Enclosure Material | Aluminium |
| Ingress Protection | IP67 |
| Hazardous Approval | Explosion Proof |
| Usage/Application | INDUSTRIAL APPLICATION |
| Model Name/Number | SITRANS TF |
| Brand | SIEMENS MAKE |
ITRANS TF
SITRANS TF is an IP67 field transmitter for heavy industrial use. It transforms resistance thermometers, thermocouples, Ohm and mV signals into a load independent DC current corresponding to sensor characteristic or a digital signal according Fieldbus standard Profibus PA or Foundation Fieldbus.
Benefits
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Flexible use – Local sensing of measured values over digital display; version without transmitter
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Rugged two-chamber enclosure in die-cast aluminium or stainless steel
- Easy handling – Test terminals for direct read-out of the output signal without breaking the current loop
- Unobstructed operation – remote mounted sensor prevents transmitter from heating up, immune against vibrations and oscillations thanks to long neck tubes and protection pipes
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