LabCompanion PR-20 Desktop High-Low Temperature Environmental Test Chamber
| Brand | LabCompanion |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Model | PR-20 |
| Temperature Range | −20 °C to +150 °C |
| Refrigeration Method | Compressor-based Cooling |
| Explosion-Proof Design | Standard (Non-Explosion-Proof) |
| Temperature Fluctuation | ±0.5 °C |
| Temperature Uniformity | ±2.0 °C |
| Temperature Deviation | ±2.0 °C |
| Heating Rate (20 °C → 150 °C, no load) | 3.0–3.5 °C/min |
| Cooling Rate (20 °C → −20 °C, no load) | 1.2 °C/min |
| Internal Chamber Dimensions | 300 × 200 × 300 mm (L × W × H) |
| Internal Volume | 18 L |
Overview
The LabCompanion PR-20 is a compact, benchtop high-low temperature environmental test chamber engineered for precise thermal stress evaluation of automotive components—specifically designed and validated for electro-acoustic devices such as electric vehicle (EV) horns, warning sound generators, and related electronic assemblies. It operates on a dual-stage compressor refrigeration system with PID-controlled forced-air convection, enabling stable and repeatable thermal cycling across a certified operational range of −20 °C to +150 °C. Unlike walk-in or floor-standing chambers, the PR-20’s desktop footprint (W450 × D520 × H680 mm) integrates seamlessly into QC labs, R&D workbenches, and production line validation stations—supporting accelerated life testing, cold-start verification, thermal shock screening, and compliance pre-testing per ISO 16750-4 (Road vehicles — Environmental conditions and testing for electrical and electronic equipment), SAE J1211, and GB/T 28046.4.
Key Features
- Compact benchtop design with 18 L internal volume and stainless-steel 304 interior chamber (electropolished finish for corrosion resistance and easy cleaning)
- High-precision dual-channel PID temperature controller with real-time digital display, programmable ramp-soak profiles, and auto-tuning capability
- Compressor-based refrigeration system with eco-friendly R404A/R23 cascade configuration (for extended low-temp stability)
- Forced-air circulation via centrifugal blower and optimized baffle layout ensures ±2.0 °C uniformity and ±0.5 °C fluctuation (per IEC 60068-3-5)
- Insulated double-wall construction with 100 mm thick polyurethane foam (thermal conductivity < 0.022 W/m·K) minimizes ambient heat leakage and energy consumption
- Standard RS485 interface with Modbus RTU protocol; optional Ethernet/USB data logging and remote monitoring via LabCompanion ChamberLink™ software
Sample Compatibility & Compliance
The PR-20 accommodates automotive horn subassemblies up to 250 mm in height and 20 kg in mass, with configurable mounting brackets and cable access ports (Φ50 mm, silicone-sealed). Its chamber geometry supports standardized mounting per DIN 75280 and ISO 7637-2 for vibration-coupled thermal tests. The unit complies with electromagnetic compatibility (EMC) requirements per EN 61326-1 and safety standards per IEC 61010-1. While not intrinsically safe, its standard configuration meets IP20 enclosure rating and is suitable for non-hazardous laboratory environments. Calibration certificates traceable to NIM (National Institute of Metrology, China) are provided with each shipment; optional UKAS-accredited calibration available upon request.
Software & Data Management
LabCompanion ChamberLink™ v3.2 (included) provides full-cycle test orchestration—including multi-step thermal profiles, real-time graphing, alarm-triggered email/SMS notifications, and audit-trail-enabled data export (CSV, PDF, XML). All logged temperature data includes timestamp, setpoint, actual reading, deviation, and controller status—fully compliant with GLP and FDA 21 CFR Part 11 requirements when configured with user role management, electronic signatures, and immutable archive mode. Raw data files are stored locally on embedded SD card (8 GB) and optionally mirrored to network drives or cloud repositories via TLS 1.2–secured API endpoints.
Applications
- Thermal endurance validation of EV horn diaphragms, voice coils, and PCB-mounted drivers under repeated −20 °C ↔ +150 °C cycling
- Pre-compliance screening for ISO 16750-4 (climatic loads) and GB/T 28046.4 (temperature variation tests)
- Material compatibility assessment of adhesives, potting compounds, and gasket elastomers used in horn housings
- Functional verification of horn control modules across extreme thermal gradients (e.g., cold soak followed by hot soak activation)
- Supporting AEC-Q200 stress testing protocols for passive and active electronic components within horn systems
FAQ
Is the PR-20 suitable for humidity testing?
No—the PR-20 is a dry-temperature-only chamber. For combined temperature/humidity testing, refer to the LabCompanion PL or PS series.
Can it perform thermal shock testing?
Not natively—it lacks dual-zone or lift-table mechanisms required for rapid transition (< 10 s) between extremes. For thermal shock, consider the CT or TS series.
What is the recommended calibration interval?
Annual calibration is advised per ISO/IEC 17025 guidelines; more frequent intervals may be required depending on usage intensity and internal quality protocols.
Does it support third-party SCADA integration?
Yes—via Modbus RTU over RS485 or OPC UA over Ethernet (with optional gateway module).
Is custom chamber dimensioning available?
Yes—LabCompanion offers non-standard internal volumes from 20 L to 8000 L, including modified port layouts, reinforced shelves, and specialized airflow configurations.
