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 within a compact, fast-response package. Engineered for reliable performance from -75 C to 540 C [-100 F to 1000 F], the HEL-700 Series features fully assembled, ready-to-use elements that eliminate the need for fragile splices to extension leads. Manufactured using a thin layer of platinum deposited on an alumina substrate and laser trimmed for precise interchangeability, these RTDs are glassed, wired, and potted or ceramic fired into a cylindrical alumina package with either TFE Teflon or fiberglass-insulated lead wires.
Product Attributes
- Brand: Honeywell
- Series: HEL-700
- Construction: Thin film platinum deposited on alumina substrate
- Packaging: Cylindrical alumina package
- Leadwire Insulation: TFE Teflon or Fiberglass
- Interchangeability: Standard 0.2% (0.5 C accuracy) or Optional 0.1% (0.3 C accuracy)
- Certifications: NIST-traceable calibration available
Technical Specifications
| Characteristic | Condition | Parameter | 1000 RTD (=0.00375) | 100 RTD (=0.00385) |
|---|---|---|---|---|
| Alpha (R0 = 100 ) | 0 C | //C | 0.00375 | 0.00385 |
| Temperature Range | TFE Teflon insulated | C [F] | -70 C to 260 C [-94 F to 500 F] | |
| Fiberglass insulated | C [F] | -75 C to 540 C [-100 F to 1000 F] | ||
| Temperature Accuracy | R0 0.2% trim (standard) | C or % | 0.5 C or 0.8% of temperature, whichever is greater | |
| R0 0.1% trim (optional) | C or % | 0.3 C or 0.6% of temperature, whichever is greater | ||
| Base Resistance & Interchangeability (R0 R0) | R0 0.2% trim (standard) | 0 C | 1000 2 | 100 0.2 |
| R0 0.1% trim (optional) | 0 C | 1000 1 | 100 0.1 | |
| Linearity | -40 C to 125 C | % of full scale | 0.1% | |
| -75 C to 540 C | % of full scale | 2.0% | ||
| Time Constant | Water at 3 ft/s | s | <0.5 s for 0.086 in O.D. | |
| Still Water | s | <1.0 s for 0.086 in O.D. | ||
| Operating Current | - | mA max. | 2 mA max. (1 mA recommended for minimal self-heating) | |
| Stability | Occupied environments | C /year or C /5 years | <0.25 C /year; 0.05 C /5 years | |
| Self Heating | - | mW/C typ. | <15 mW/C typ. for 0.086 in O.D. | |
| Insulation Resistance | 50 Vdc at 25 C | M | >50 M | |
| Case Material | - | - | High purity alumina | |
| Leadwire Material | Teflon-insulated | - | Nickel-coated stranded copper, epoxy potting | |
| Leadwire Material | Fiberglass-insulated | - | Nickel-coated stranded copper, ceramic potting | |
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
Available Configurations
The HEL-700 Series offers various configurations including:
- Models: HEL-705, HEL-707, HEL-711, HEL-712, HEL-716, HEL-717
- Leadwire Insulation: TFE Teflon or Fiberglass
- Leadwire Gauge: 28 AWG or 24 AWG
- Number of Wires: 2-wire or 3-wire
- Resistance & Alpha: 1000 (=0.00375) or 100 (=0.00385, DIN Standard)
- Resistance Trim: Standard (0.2%) or Optional (0.1%)
- Leadwire Length: 12 inches (standard)
- NIST Calibration: Available at 1, 2, or 3 standard temperature points (C1, C2, C3)
Dimensional Drawings
Refer to Figure 4 in the datasheet for detailed dimensional drawings of the HEL-705, HEL-707, HEL-711, HEL-712, HEL-716, and HEL-717 models.
Circuit Diagrams
Refer to Figure 5 in the datasheet for Wheatstone Bridge, 2-Wire Interface, Linear Output Voltage, and Adjustable Point (Comparator) Interface circuit diagrams.
Safety Precautions
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.
2410311727_Honeywell-HEL-707-U-1-12-C1_C17521043.pdf
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