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. Ideal for measuring temperatures from -75 C to 540 C [-100 F to 1000 F], they are fully-assembled and ready-to-use in probe assemblies, eliminating the need for fragile splices. Manufactured with a thin layer of platinum on an alumina substrate and laser-trimmed for precision, these RTDs are available with standard 0.2% or optional 0.1% interchangeability for enhanced accuracy.
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
- Case Material: Alumina
- Leadwire Insulation: TFE Teflon or Fiberglass
- Leadwire Construction: Nickel-coated stranded copper
- Potting: Epoxy (Teflon leads) or Ceramic (Fiberglass leads)
Technical Specifications
| Characteristic | Condition | Parameter | Details |
|---|---|---|---|
| Alpha | R0 = 100 | 0 C | 0.00385 //C |
| R0 = 1000 | 0 C | 0.00375 //C | |
| Temperature Range | TFE Teflon insulated | -70 C to 260 C [-94 F to 500 F] | |
| Fiberglass insulated | -75 C to 540 C [-100 F to 1000 F] | ||
| Temperature Accuracy | R0 0.2% trim (standard) | 0.5C or 0.8% of temperature, whichever is greater | |
| R0 0.1% trim (optional) | 0.3C or 0.6% of temperature, whichever is greater | ||
| Base Resistance and Interchangeability (R0 R0) | R0 0.2% trim (standard) | 0 C, 1000 | 2 |
| R0 0.1% trim (optional) | 0 C, 1000 | 1 | |
| Linearity | -40 C to 125 C | 0.1% of full scale | |
| -75 C to 540 C | 2.0% of full scale | ||
| Time Constant | Water at 3 ft/s | 0.086 in O.D. | <0.5 s |
| Still water | 0.086 in O.D. | <1.0 s | |
| Operating Current | 2 mA max. (1 mA recommended for minimal self-heating) | ||
| Stability | Occupied environments | <0.25 C /year; 0.05 C /5 years | |
| Self Heating | 0.086 in O.D. | <15 mW/C typ. | |
| Insulation Resistance | 50 Vdc at 25 C | >50 M |
Nomenclature and Ordering Guide (Example)
Part Number Structure: HEL- [Series] - [Leadwire Config] - [Resistance/Alpha] - [Trim] - [Leadwire Length] - [Calibration]
Example: HEL-705-U-0-12-C1
- HEL-705: HEL-700 Series, TFE Teflon, 28 gauge; 2-wire
- U: Resistance and Alpha (1000 : 0.00375 //C)
- 0: Standard 0.2% trim
- 12: Leadwire Length (12 inches)
- C1: NIST calibration report at 0 C
Available Leadwire Configurations
| Model | Leadwire Type | Gauge | Wire Count |
|---|---|---|---|
| HEL-705 | TFE Teflon | 28 gauge | 2-wire |
| HEL-707 | Fiberglass | 28 gauge | 2-wire |
| HEL-711 | TFE Teflon | 28 gauge | 3-wire |
| HEL-712 | Fiberglass | 28 gauge | 3-wire |
| HEL-716 | TFE Teflon | 24 gauge | 3-wire |
| HEL-717 | Fiberglass | 24 gauge | 3-wire |
NIST Calibration Options
- C1: NIST calibration report at 0 C
- C2: NIST calibration report at 0 C and 100 C
- C3: NIST calibration report at 0 C, 100 C, and 260 C
Dimensional Drawings (Reference Only)
Refer to Figure 4 in the datasheet for detailed dimensional drawings of HEL-705, HEL-707, HEL-711, HEL-712, HEL-716, and HEL-717 models.
Circuit Interfaces
Refer to Figure 5 in the datasheet for diagrams illustrating Wheatstone Bridge, 2-Wire Interface, Linear Output Voltage, and Adjustable Point (Comparator) circuits.
Safety Warnings
- 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.
2403111658_Honeywell-HEL-707-U-0-12-00_C17670308.pdf
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