Description
RTD with Temperature Transmitter (Model APFS) is a complete PT100 temperature measurement assembly that combines a high-accuracy Simplex PT100 RTD sensor with an integrated head-mounted temperature transmitter inside a rugged IP67 flameproof aluminium terminal head. Instead of transmitting a raw RTD resistance signal to the control panel, the built-in transmitter converts the sensor output directly into a standard 4–20 mA analog signal at the measurement point, factory calibrated for a 0°C to 200°C temperature range. This design minimizes signal degradation over long cable runs, improves electrical noise immunity, and simplifies installation by eliminating the need for a separate DIN-rail transmitter inside the control cabinet.
Designed for demanding industrial environments, the assembly features a 500 mm SS316 stainless steel probe, an adjustable 1/2-inch BSP process connection for flexible insertion depth, and a flameproof enclosure suitable for appropriately classified hazardous areas according to the supplied configuration. The standardized 4–20 mA output enables seamless integration with PLCs, DCS, SCADA systems, distributed I/O, industrial controllers, and data acquisition systems. Manufactured by Aavad Instrument, this RTD with integrated temperature transmitter is widely used in chemical processing, petrochemical plants, oil & gas facilities, pharmaceutical manufacturing, power generation, utilities, and industrial automation systems requiring reliable long-distance temperature signal transmission.
Key Features
-
Head-Integrated 4-20 mA Transmitter Converts raw resistance into a highly stable, noise-immune current loop right at the measurement source, eliminating remote signal degradation.
-
Pre-Calibrated 0°C to 200°C Thermal Span Factory-configured and scaled out of the box to deliver immediate, linear tracking across mid-range industrial processes.
-
Streamlined Control Panel Footprint Eliminates the need for separate, auxiliary DIN-rail transmitter modules inside your centralized automation enclosures, reducing overall system costs.
-
Extended 500 mm Insertion Probe Long-reach 6 mm OD probe design allows deep immersion into massive storage tanks, chemical reactors, and large-diameter processing lines.
-
Sliding Adjustable 1/2″ BSP Fitting Equipped with a compression connector that lets technicians fine-tune and lock the probe insertion depth during installation.
-
Durable Marine-Grade SS316 Sheath Heavy-walled stainless steel body shields the internal sensor from scaling, high-temperature oxidation, and chemical corrosion.
-
Certified Flameproof IP67 Protection Ruggedized, explosion-proof terminal housing provides absolute security against gas ignition, dust, and high-pressure water spray.
-
Single Cable Entry Conduit Port Clean, dedicated electrical conduit access ensures a tightly sealed, flameproof wiring run directly to your PLC or data logger.
Applications
-
Long-Distance Infrastructure Monitoring Perfect for expansive water treatment plants, offshore platforms, and remote tank farms where sensors sit far from the control room.
-
Hazardous-Area Process Automation Reliable temperature loop tracking inside classified chemical processing units, oil refineries, and volatile fuel storage zones.
-
Modernized PLC & DCS Integrations Ideal for processing plants standardizing their automation infrastructure around universal 4-20 mA analog input cards.
-
Food, Beverage, and Utility Systems Accurate temperature tracking across large pasteurization vats, cleaning-in-place (CIP) loops, and commercial steam lines.
Datasheet
FAQs
1. What is an RTD with Temperature Transmitter and how does it differ from a plain RTD?
An RTD with Temperature Transmitter combines a PT100 Resistance Temperature Detector (RTD) with a head-mounted temperature transmitter that converts the RTD resistance signal into a standardized 4–20 mA current loop output. Unlike a standard RTD, it eliminates the need for a separate signal converter in the control panel, simplifying installation and improving signal transmission over long distances.
2. What is the calibration range of Aavad’s RTD with Temperature Transmitter?
Aavad’s Model APFS is factory calibrated for a temperature range of 0°C to +200°C and provides a 4–20 mA output signal. It features a simplex 3-wire PT100 sensing element housed in a 6 mm outer diameter (OD), 500 mm long SS316 stainless steel probe for accurate industrial temperature measurement.
3. What protection does the Head-Mounted Transmitter Housing provide?
The integrated transmitter is enclosed within a die-cast aluminum flameproof protection head rated IP67 with a single cable entry. This housing protects the transmitter electronics from dust, moisture, and harsh industrial environments, while also providing explosion protection in certified hazardous-area installations.
4. Why choose a 4–20 mA output instead of a raw RTD signal?
A 4–20 mA current loop provides excellent resistance to electrical noise, voltage drop, and signal loss over long cable runs. It is also the industry-standard input for PLCs, DCS systems, SCADA platforms, process controllers, and industrial automation equipment, allowing direct integration without additional signal conditioning hardware.
5. What applications typically use an RTD with Integrated Temperature Transmitter?
RTD Sensors with Integrated Temperature Transmitters are widely used in industrial process monitoring, chemical and pharmaceutical manufacturing, HVAC and refrigeration systems, laboratory testing and calibration, food processing, power plants, boilers, energy systems, and industrial automation, where a reliable 4–20 mA temperature signal simplifies installation and process control.
