Pyromation RTD's and Sensors for HVAC, 3 Wire RTD, Transmitter

Precision Temperature Measurement: Pyromation RTDs for HVAC & Industrial Applications

Pyromation offers a comprehensive range of Resistance Temperature Detectors (RTDs) and sensors, ideal for accurate process temperature sensing in HVAC systems and various industrial settings. Explore our 3-wire RTDs, integrated with transmitters for seamless data acquisition.

Resistance Temperature Detectors (RTDs), also known as resistance thermometers, are precision temperature sensors that leverage the predictable change in electrical resistance of certain metallic elements with temperature. This fundamental principle allows RTDs to provide highly accurate and repeatable temperature measurements.

How RTDs Work: At their core, RTDs consist of a sensing element typically made from platinum, nickel, or copper. As temperature changes, the electrical resistance of this element changes proportionally. A small, constant excitation current is passed through the element, and the resulting voltage drop across it is measured. This voltage, directly proportional to the resistance, is then converted into a precise temperature reading based on the RTD's known calibration curve.

Construction and Design: The RTD sensing element is carefully manufactured by either winding a fine wire (wire-wound elements) or depositing a thin film (thin-film elements) onto a ceramic or glass core. This delicate assembly is then protected within a ceramic or glass capsule, safeguarding it from environmental factors and ensuring long-term stability.

Addressing Lead Wire Resistance: Given that most RTDs have a relatively low initial resistance (commonly 100 ohms for a Pt100) and exhibit a small change in resistance per unit of temperature, even minor resistance in the connecting lead wires can introduce measurement errors. To counteract this, Pyromation's RTDs often utilize three or four-wire bridge configurations. These advanced wiring methods are incorporated into the measuring devices to effectively compensate for lead wire resistance, ensuring superior accuracy, especially over longer distances or in applications requiring high precision.

Exceptional Temperature Range & Versatility: By carefully selecting the appropriate sensing elements and robust protective sheathing, Pyromation RTDs are engineered to operate reliably across an extensive temperature range, typically from -200°C to 600°C (-328°F to 1112°F). This broad capability makes them suitable for a diverse array of applications, from cryogenic temperatures to high-temperature industrial processes.

Pyromation's RTD Solutions: Pyromation is a leading manufacturer of high-quality resistance temperature detectors and resistance thermometers, catering to numerous industry applications. Our extensive product line includes:

• Single- or Dual-Element RTDs: Offering redundancy or differential measurement capabilities.
• Pt100s to Pt1000s: A wide selection of platinum resistance thermometers to meet specific resistance and accuracy requirements.
• Sanitary CIP Configurations: Designed for hygiene-critical applications, compliant with Clean-in-Place (CIP) standards.
• Custom-Engineered Solutions: If your application demands a unique solution not found in our standard catalog, our expert product engineers can design and manufacture a custom RTD measurement device. This includes specialized temperature sensor assemblies complete with connection heads, thermowells, and integrated transmitters to provide a complete, ready-to-install solution.

Featured Product Example:

Description: Precision RTD, 100 Ohm (Pt100), 1/4" OD Sheath, 4" Immersion Length, Spring-Loaded Design for optimal tip contact, with a durable 1/2" NPT 316 Stainless Steel Hex Fitting for robust process connection, enclosed in a rugged Aluminum Head. Features an integrated 4-20mA Transmitter, factory-calibrated for a 0-400°F range, providing a linearized and interference-resistant output signal.

Temperature Range: -200 to 200°C (-328 to 392°F) - Note: Transmitter range for this specific model is 0-400°F (0-204°C).

Process Connection: 1/2" NPT, 316 Stainless Steel construction for corrosion resistance and secure mounting.

Conduit Opening: 3/4" NPT for standard electrical conduit connections, ensuring easy and protected wiring.