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Used to measure gas or liquid pressure.

• Pressure Gauge – Local visual indication.

• Pressure Transmitter – Sends pressure data to control systems (e.g., PLC/DCS).

• Differential Pressure (DP) Transmitter – Measures pressure difference (often used for flow and level).

Common Uses: Boilers, pipelines, compressors.

SIEMENS temperature measuring instruments mainly come under the SITRANS temperature measurement family. These are widely used in industries like power plants, chemical plants, oil & gas, pharmaceutical, and food processing for accurate temperature monitoring.

Below are the main SIEMENS make temperature measuring instruments.

1. Temperature Sensors (RTD / Thermocouple Type) 🔹 Siemens SITRANS TS100

• General-purpose industrial temperature sensor

• Compact design with cable connection

• Used for standard process measurements

🔹 Siemens SITRANS TS200

• Compact mineral-insulated temperature sensor

• Suitable for harsh environments

• Can be used without thermowell in hazardous zones

🔹 Siemens SITRANS TS300

• Hygienic temperature sensor

• Designed for food, pharmaceutical, and biotech industries

• Clamp-on type available for pipe temperature measurement

🔹 Siemens SITRANS TS500

• Modular industrial temperature sensor

• Suitable for high temperature and harsh environments

• Explosion-proof and intrinsically safe versions available

2. Temperature Transmitters (4–20 mA / HART / Fieldbus)

These convert RTD or thermocouple signals to 4–20 mA or digital signals for PLC/DCS.

🔹 Siemens SITRANS TH100

• Basic head-mount transmitter

• Used mainly with Pt100 RTD sensors

• Low-cost solution for simple applications

🔹 Siemens SITRANS TH200

• Universal transmitter for RTD and thermocouples

• 4–20 mA output

🔹 Siemens SITRANS TH300

• Advanced head transmitter

• HART communication

• High accuracy and stability

🔹 Siemens SITRANS TH320 / TH420

• High-reliability transmitter

• Dual sensor input and hot-backup function for critical processes

3. Rail-Mounted Temperature Transmitters 🔹 Siemens SITRANS TR200

• DIN-rail mounted transmitter

• Converts RTD/thermocouple signals to 4–20 mA

🔹 Siemens SITRANS TR300

• HART communication

• Suitable for control panels

🔹 Siemens SITRANS TR320 / TR420

• Advanced rail transmitters with diagnostic features

4. Typical Temperature Measurement Setup (SIEMENS)

Industrial temperature measurement usually includes:

1. Sensor: RTD or Thermocouple (SITRANS TS series)

2. Transmitter: SITRANS TH or TR series

3. Controller: PLC / DCS (e.g., Siemens S7)

4. Output: 4–20 mA / HART / Fieldbus signal

iemens Pressure Instruments

• Siemens SITRANS P Series Pressure Sensor · ₹85,964.80 Industrial pressure transmitter/sensor (4-20 mA output) for process measurement.

• Siemens QBM81-10 Differential Pressure Monitor · ₹6,145 Differential pressure monitor (100–1000 Pa range).

• Siemens QBM81-5 Differential Pressure Monitor · ₹6,415 Differential pressure monitor (50–500 Pa).

• Siemens 7MF1565-3CA00-1AA1 · ₹14,931.01 Digital/compact pressure monitoring device.

�� Siemens instruments are typically part of the SITRANS series used for industrial pressure sensing, differential pressure monitoring, and transmitters integrated into process systems.

�� WIKA Pressure Instruments

• Wika Bourdon Tube Pressure Gauge · ₹2,264.12 Analog bourdon tube pressure gauge (mechanical).

• Wika 213.53.63 Pressure Gauge 0‑400 kg/cm² · ₹2,079 WIKA pressure gauge in robust industrial range.

• WIKA A‑10 Pressure Transmitter · ₹19,340 Pressure transmitter for high-range industrial measurement.

• WIKA Pressure Transmitter S‑11 · ₹45,170.87 Electronic pressure transmitter for precise pressure measurement.

WIKA offers a wide portfolio including mechanical gauges, digital pressure gauges, electronic pressure sensors and transmitters — from low-range industrial applications to high-pressure systems.

Siemens is a major manufacturer of industrial instrumentation used in process industries like oil & gas, power plants, chemical plants, water treatment, and manufacturing. Their instruments measure and control pressure, flow, level, temperature, and valve position. Below is a simple explanation of each device. ⚙️📊

1. Smart DPT (Differential Pressure Transmitter)

A Differential Pressure Transmitter (DPT) measures the difference between two pressures.

Working

• It has two pressure inputs:

  • High pressure (H)

  • Low pressure (L)

• The transmitter calculates the difference (ΔP) and converts it to a 4–20 mA signal or digital communication (HART/Fieldbus).

Uses

• Flow measurement (with orifice plate)

• Filter monitoring

• Tank level measurement

• Pressure drop measurement

Example Siemens Models

• Siemens SITRANS P DS III

• Siemens SITRANS P320/P420

Key Features

✔ High accuracy
✔ Digital communication
✔ Remote calibration
✔ Temperature compensation

2. Smart PT (Pressure Transmitter)

A Pressure Transmitter (PT) measures absolute pressure or gauge pressure in pipes or tanks.

Working

• Pressure acts on a sensor diaphragm

• Sensor converts pressure → electrical signal

• Output signal = 4–20 mA

Types

1. Gauge pressure transmitter

2. Absolute pressure transmitter

3. Vacuum pressure transmitter

Siemens Example

• Siemens SITRANS P DS III

Applications

• Steam pressure monitoring

• Gas pressure control

• Pump discharge pressure

• Boiler pressure measurement

3. Smart Valve Positioner

A Valve Positioner controls the exact opening position of a control valve.

Working

1. Control system sends 4–20 mA signal

2. Positioner converts signal to pneumatic pressure

3. Adjusts valve position using feedback sensor

Siemens Example

• Siemens SIPART PS2

Features

✔ Auto calibration
✔ Digital diagnostics
✔ Valve travel monitoring
✔ HART / Profibus communication

Use

• Chemical dosing control

• Steam flow control

• Process control valves

4. Flow Meter

Flow meters measure liquid, gas, or steam flow rate in pipelines.

Types (Siemens) 1️⃣ Electromagnetic Flowmeter

• Used for conductive liquids

• No moving parts

Example:

• Siemens SITRANS MAG 5100W

2️⃣ Ultrasonic Flowmeter

• Uses sound waves to measure flow

Example:

• Siemens SITRANS FS230

3️⃣ Vortex Flowmeter

• Used for steam & gas

Example:

• Siemens SITRANS FX330

Output

• 4–20 mA

• Pulse output

• Digital communication

5. Level Instruments

Level instruments measure liquid or solid level inside tanks or silos.

Types Radar Level

Uses