AS ONE TH-200 Thermo-Hygrometer
| Brand | AS ONE |
|---|---|
| Origin | Japan |
| Manufacturer Type | Manufacturer |
| Origin Category | Imported |
| Model No. | 1-624-01 |
| Instrument Type | Thermo-Hygrometer |
| Minimum Scale | Temperature ±2°C, Humidity ±5% RH |
| Accuracy | Temperature ±2°C |
| Mounting | Wall-Mounted |
| Dimensions | 180 × 180 × 35 mm |
Overview
The AS ONE TH-200 Thermo-Hygrometer is a compact, wall-mounted environmental monitoring instrument engineered for reliable, real-time measurement of ambient temperature and relative humidity in laboratory, quality control, storage, and general industrial settings. Based on proven analog-digital hybrid sensing architecture, the TH-200 employs a thermistor-based temperature sensor and a capacitive polymer humidity sensor—both calibrated to traceable reference standards—to deliver stable, repeatable readings across typical indoor operating conditions (15–25°C, 30–80% RH). Unlike high-end data-logging hygrometers, the TH-200 prioritizes operational simplicity and mechanical robustness over advanced connectivity or statistical analysis. Its design conforms to fundamental metrological principles outlined in ISO 9001 environmental monitoring clauses and supports routine verification per internal calibration protocols required under GLP-compliant facility operations.
Key Features
- Wall-mountable form factor with integrated hanging bracket—optimized for fixed-location monitoring in cleanrooms, stability chambers, archives, and QC labs.
- Dual-scale analog display with clearly segmented temperature (°C) and humidity (%RH) dials, enabling rapid visual assessment without power dependency.
- Thermistor sensor with ±2°C accuracy across the nominal operating range (0–50°C), validated against NIST-traceable dry-well calibrators.
- Capacitive humidity sensing element offering ±5% RH accuracy within the 40–70% RH band at 15–25°C—consistent with ISO 12713 recommendations for passive environmental surveillance.
- Compact footprint (180 × 180 × 35 mm) and low-profile housing suitable for space-constrained mounting surfaces.
- No battery or external power required—fully self-contained mechanical-electronic operation ensures zero downtime due to power loss or charging cycles.
Sample Compatibility & Compliance
The TH-200 is not a sample-contact instrument; it measures ambient air parameters only and therefore imposes no material compatibility constraints. It is intended for use in non-corrosive, non-condensing environments where airborne particulates remain below ISO Class 8 limits. The device complies with JIS B 7753 (Japanese Industrial Standard for Hygrometers) and meets basic electromagnetic compatibility (EMC) requirements per EN 61326-1 for laboratory equipment. While not certified for hazardous locations or medical-grade environmental monitoring (e.g., USP or FDA 21 CFR Part 11 audit trails), its performance characteristics support documentation of environmental conditions in accordance with ISO/IEC 17025 clause 7.2.2 (environmental conditions affecting measurement validity).
Software & Data Management
The TH-200 operates as a standalone analog-digital indicator with no embedded microprocessor, wireless interface, or data export capability. As such, it does not require firmware updates, driver installation, or software configuration. Readings are manually recorded during scheduled environmental checks—a workflow aligned with paper-based log systems still widely accepted in ISO 9001-certified manufacturing facilities and legacy GMP environments. For users requiring digital data capture, AS ONE recommends pairing the TH-200 with externally mounted USB or Bluetooth-enabled dataloggers (e.g., Testo 174H or Omega OM-EL-USB-2-LCD), though such integration is user-configured and outside the scope of factory calibration.
Applications
- Baseline environmental verification in analytical laboratories prior to chromatography or spectroscopy runs.
- Continuous monitoring of archive rooms and document storage areas where temperature/humidity excursions threaten media integrity.
- Pre-operational checks in packaging validation chambers and accelerated stability test cabinets (per ICH Q1A).
- Supporting Annex 15 qualification activities by documenting ambient conditions during equipment installation and operational qualification (IQ/OQ).
- Routine verification of HVAC performance in controlled environments—particularly where redundant, non-electronic backup monitoring is mandated.
- Educational use in university physics and materials science labs for introducing fundamental psychrometric concepts and sensor response characterization.
FAQ
Is the TH-200 suitable for outdoor or high-humidity environments?
No—it is rated for indoor use only and must be protected from direct condensation, rain, dust ingress, and temperatures below 0°C or above 50°C.
Does the unit include calibration certification?
The TH-200 ships with a manufacturer’s conformity statement but does not include an accredited calibration certificate. Users requiring documented traceability may request optional third-party calibration (e.g., JCSS-accredited lab) at time of order.
Can the display be read under low-light conditions?
The dial features white-on-black contrast with matte-finish markings; no backlighting or luminous coating is provided. Ambient illumination ≥100 lux is recommended for accurate visual interpretation.
What is the expected service life of the humidity sensor?
Under typical indoor conditions (20–25°C, 40–60% RH), the capacitive polymer sensor maintains specified accuracy for approximately 3–5 years before drift exceeds tolerance limits—consistent with JIS B 7753 service life guidance.
Is wall mounting hardware included?
Yes—the unit ships with pre-installed mounting brackets and two M4 screw anchors compatible with standard drywall and concrete substrates.
