Anritsu Meter AR-6500H / AR-6501H Dual-Mode Handheld Infrared & Contact Thermometer
| Brand | Anritsu Meter |
|---|---|
| Origin | Japan |
| Model | AR-6500H / AR-6501H |
| Measurement Principle | Radiation-based (Infrared) + Contact (Thermocouple) |
| Measurement Modes | Non-contact IR + K-type thermocouple contact |
| Temperature Range (IR) | –50.0 to 500.0 °C (AR-6500H), 0 to 1200 °C (AR-6501H) |
| Temperature Range (Contact) | –50.0 to 500.0 °C (K-type, ≤500 Ω) |
| Resolution | 0.1 °C (–50.0 to 525.0 °C display range), 1 °C (up to 1250 °C) |
| Accuracy (IR, AR-6500H) | ±3 °C (<0 °C), ±2 °C (0–250 °C), ±0.8% of reading +1 digit (250–500 °C) |
| Accuracy (Contact, K-type) | ±(0.05% of reading + 0.1 °C) ±1 digit |
| Emissivity Adjustment Range | 0.10–2.00 (0.01 step) |
| Spectral Response | 8–14 µm |
| Detector | Thermopile |
| Response Time | ≈300 ms |
| Laser Targeting | Integrated Class II red laser (650 nm) |
| Repeatability | ±0.4% of reading +1 digit |
| Reference Junction Compensation Accuracy | ±0.2 °C (at 25 °C ±10 °C) |
| Temperature Coefficient | ±0.01% / °C of measured range |
| Analog Output | –1 mV/°C (optional, sensor sold separately) |
| Output Accuracy | ±(0.15% FS + 1 mV) at 25 °C ±5 °C |
| Power | Rechargeable Ni-Cd battery |
| Operating Time | >30 hours per full charge (varies with usage) |
| Operating Environment | 0–40 °C, 0–80% RH (non-condensing) |
| Storage Environment | –20–50 °C, 0–85% RH (non-condensing) |
| Dimensions | As per manufacturer’s mechanical drawing |
| Weight | Approx. 400 g |
| Compliance | IEC 60584-1:2013 (K-type linearization), CE marking, RoHS compliant |
Overview
The Anritsu Meter AR-6500H and AR-6501H are dual-mode handheld thermometers engineered for precision temperature verification in industrial maintenance, HVAC commissioning, laboratory QA/QC, and manufacturing process monitoring. Unlike conventional single-principle instruments, these models integrate two independent measurement modalities: non-contact infrared radiometry (8–14 µm spectral band) and contact-based thermocouple sensing (K-type input). This hybrid architecture enables users to select the optimal method based on surface emissivity, accessibility, thermal inertia, or regulatory constraints—without compromising metrological traceability. The infrared channel operates on Planck’s radiation law, calibrated against blackbody references across its full span; the contact mode implements digital linearization compliant with IEC 60584-1:2013, ensuring thermoelectric output conforms to standardized K-type voltage-temperature relationships. Both channels share a common high-stability thermopile detector and reference-junction compensation circuitry, minimizing drift under ambient fluctuations.
Key Features
- Dual-sensor architecture supporting simultaneous configuration of IR and K-type thermocouple inputs—enabling cross-validation and method-specific uncertainty mitigation.
- Auto-emissivity correction function: When a contact probe is connected and stabilized on the target surface, the instrument calculates and applies real-time emissivity compensation for subsequent IR measurements—eliminating manual estimation errors.
- Adjustable emissivity from 0.10 to 2.00 in 0.01 increments—critical for low-emissivity metals (e.g., polished aluminum, stainless steel) and high-transmissivity materials (e.g., thin plastics, ceramics).
- Integrated Class II targeting laser (650 nm) with optical alignment optimized for the instrument’s 12 mm minimum spot diameter at 500 mm distance—ensuring spatial resolution meets ISO 13154 requirements for diagnostic thermography.
- High-resolution LCD display with dual-unit capability (°C/°F), configurable refresh rate (~300 ms), and auto-hold function triggered by thermal stability detection.
- Rechargeable Ni-Cd battery system rated for >30 hours of continuous operation—designed for field deployment without reliance on disposable cells or external power sources.
Sample Compatibility & Compliance
The AR-6500H/6501H accommodates diverse sample geometries and surface conditions through its flexible measurement modes. Non-contact operation supports moving targets (conveyor belts, rotating machinery), hazardous surfaces (high-voltage components, steam lines), and sterile environments (pharmaceutical cleanrooms). Contact mode—using optional ANP-compatible K-type probes—provides direct conduction-based readings for internal temperatures (e.g., liquid baths, extrusion dies, oven walls). All configurations comply with international standards governing thermal instrumentation: IEC 60584-1:2013 (thermocouple reference functions), IEC 62906-2 (infrared thermometer performance criteria), and ISO/IEC 17025:2017 (when used within accredited calibration workflows). Device firmware includes audit-trail-capable logging (via optional PC interface) aligned with FDA 21 CFR Part 11 requirements for electronic records in regulated industries.
Software & Data Management
While the AR-6500H/6501H operates as a self-contained field instrument, analog output (–1 mV/°C) enables integration into SCADA, PLC, or data acquisition systems for continuous trend monitoring. Optional PC connectivity—via RS-232 or USB adapter (sold separately)—supports firmware updates, emissivity profile storage, and timestamped measurement export in CSV format. Calibration certificates provided with each unit include NIST-traceable uncertainty budgets per ISO/IEC 17025. Internal memory retains up to 1000 measurement records with metadata (date/time, emissivity setting, mode flag, ambient compensation value), retrievable via serial dump. Software tools support GLP-compliant report generation, including operator ID fields and calibration due dates.
Applications
- Electrical infrastructure: Hot-spot detection on busbars, transformer windings, and breaker contacts—using non-contact mode to avoid arc-flash risk.
- Food processing: Validation of HACCP-critical zones (e.g., retort sterilizers, chilling tunnels) via contact probe insertion, cross-checked with IR surface mapping.
- Automotive R&D: Thermal profiling of brake rotors, exhaust manifolds, and battery modules under dynamic load cycles.
- Building diagnostics: Quantifying thermal bridging and insulation integrity per ASTM C1060 and ISO 6781-3 protocols.
- Research laboratories: Inter-comparison studies between contact and radiometric methods under controlled emissivity conditions (e.g., using certified reference plates).
FAQ
Does the AR-6500H support emissivity adjustment during live measurement?
Yes—emissivity can be modified in real time via the front-panel keypad, with immediate update of displayed temperature. Changes are retained in non-volatile memory until manually reset.
Is K-type thermocouple calibration included with the base unit?
No—the instrument accepts standard K-type inputs but does not include probe calibration. Users must supply ANP-terminated probes with valid calibration certificates traceable to national standards.
Can the analog output be used for closed-loop control?
The –1 mV/°C output is designed for monitoring only; it lacks the stability and noise immunity required for direct PID controller input. Use only for trending or alarm thresholding.
What is the minimum spot size achievable at 1 meter distance?
Optical design yields a 12 mm diameter spot at 500 mm; at 1 m, spot size expands to approximately 24 mm (2:1 distance-to-spot ratio), consistent with industry-standard D:S specifications.
How is reference junction compensation performed?
An integrated Pt100 sensor monitors the terminal block temperature; compensation is applied digitally using ITS-90 polynomial coefficients, achieving ±0.2 °C accuracy within 25 °C ±10 °C ambient.
