Honeywell HEL-700 Series Thin Film Platinum RTDs

Product Overview

The Honeywell HEL-700 Series Thin Film Platinum RTDs are designed for critical temperature monitoring and control in industrial applications. These sensors offer a linear change in resistance versus temperature, providing high linearity, stability, accuracy, and a wide temperature range in a compact, fast-response package. Manufactured using a thin layer of platinum deposited on an alumina substrate and laser trimmed, these fully-assembled elements are ready-to-use in probe assemblies, eliminating the need for fragile splices. They are suitable for applications ranging 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
• Substrate Material: Alumina
• Case Material: Ceramic
• Leadwire Insulation: TFE Teflon or Fiberglass
• Leadwire Construction: Nickel-coated stranded copper
• Potting: Epoxy (Teflon-insulated) or Ceramic (fiberglass-insulated)

Technical Specifications

Ordering Guide (Example)

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

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

Note: Other configurations available for fiberglass insulation, different leadwire gauges, 3-wire configurations, and NIST calibration points. Refer to detailed ordering guide in datasheet.

Dimensional Drawings

(Refer to Figure 4 in the datasheet for detailed drawings of HEL-705, HEL-707, HEL-711, HEL-712, HEL-716, HEL-717 models.)

Circuit Examples

(Refer to Figure 5 in the datasheet for Wheatstone Bridge, 2-Wire Interface, Linear Output Voltage, and Adjustable Point (Comparator) Interface circuit diagrams.)

Safety Information

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.

WARNING: 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.