Product Overview

The Honeywell HEL-700 Series Thin Film Platinum RTDs are high-accuracy Resistance Temperature Detectors designed for critical temperature monitoring and control in industrial applications. These RTDs offer a linear change in resistance versus temperature, providing excellent linearity, stability, accuracy, and a wide operating temperature range in a compact, fast-response package. Ready-to-use, fully assembled elements eliminate the need for fragile splices. Manufactured with a thin layer of platinum deposited on an alumina substrate and laser-trimmed for precise resistance interchangeability, the HEL-700 Series is ideal for applications requiring reliable temperature sensing from -75 C to 540 C [-100 F to 1000 F].

Key Features

• Wide temperature range
• Interchangeable
• Accurate
• Linear resistance vs temperature
• Fast response
• Laser trimmed
• Ceramic case material
• TFE Teflon or fiberglass leadwires
• Multiple small sizes
• Ready-to-use, fully assembled elements

Potential Applications

• Industrial: HVAC equipment, instrument and probe assemblies, process control, motor windings and bearings, battery packs, environmental chambers, ovens and kilns, drill holes in large objects.
• Medical: Autoclaves.
• Aerospace/Defense: Aircraft, space vehicles.

Product Attributes

• Brand: Honeywell
• Series: HEL-700
• Sensing Element: Thin Film Platinum RTD
• Substrate Material: Alumina
• Leadwire Insulation: TFE Teflon or Fiberglass
• Case Material: Ceramic

Technical Specifications

Ordering Guide (Example Configuration)

HEL-705-U-0-12-C1 defines an HEL-700 Series Thin Film RTD with:

• Series: HEL-700
• Model: 705 (TFE Teflon, 28 gauge; 2-wire)
• Resistance & Alpha: U (1000 : 0.00375 //C)
• Trim: 0 (Standard: 0.2%)
• Leadwire Length: 12 (12 inches)
• NIST Calibration: C1 (at 0 C)

Available Leadwire Configurations

• Teflon-Insulated: HEL-705 (2-wire), HEL-711 (3-wire), HEL-716 (3-wire)
• Fiberglass-Insulated: HEL-707 (2-wire), HEL-712 (3-wire), HEL-717 (3-wire)

Functional Behavior

RT = R0(1 + AT + BT - 100CT + CT)

Where:

• RT = Resistance () at temperature T (C)
• R0 = Resistance () at 0 C
• T = Temperature (C)

Electrical Interface Options

• Wheatstone Bridge
• 2-Wire Interface
• Linear Output Voltage
• Adjustable Point (Comparator) Interface

Caution

PRODUCT DAMAGE: Ensure proper ESD (Electrostatic Discharge) precautions are followed when handling this product. Failure to comply with these instructions may result in product damage.

Warning

PERSONAL INJURY: DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. Failure to comply with these instructions could result in death or serious injury.

MISUSE OF DOCUMENTATION: The information presented in this product sheet is for reference only. Do not use this document as a product installation guide. Complete installation, operation, and maintenance information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in death or serious injury.