Handheld Digital Thermometer – Checktemp Series
| Origin | USA |
|---|---|
| Manufacturer Type | Distributor |
| Origin Category | Imported |
| Model | Handheld Digital Thermometer |
| Price | Upon Request |
| Temperature Range (°C) | −20 to +120 °C |
| Temperature Range (°F) | −58 to +302 °F |
| Accuracy (°C) | ±0.3 °C (−20 to +90 °C), ±0.5 °C (outside range) |
| Accuracy (°F) | ±0.5 °F (−4 to +194 °F), ±1.0 °F (outside range) |
| Response Time | ≤20 s |
| Power Supply | 1 × 1.4 V battery (3000-hour typical lifespan) |
Overview
The Handheld Digital Thermometer – Checktemp Series is a precision-engineered portable temperature measurement instrument designed for rapid, reliable, and traceable thermal readings across diverse laboratory, quality control, and field service environments. Utilizing a high-stability NTC thermistor sensor with low thermal mass probe geometry, the device operates on the principle of resistance-temperature correlation—calibrated against NIST-traceable reference standards. Its compact, ergonomic design enables single-hand operation while maintaining IP65-rated ingress protection against dust and water splashes. The thermometer is optimized for non-invasive or minimally invasive contact measurements in dynamic thermal environments where speed, repeatability, and metrological integrity are critical—particularly in applications governed by ISO/IEC 17025, ASTM E74, or USP analytical instrument qualification frameworks.
Key Features
- High-resolution digital display with backlight for low-light conditions and quick visual verification
- Auto-ranging functionality with automatic unit switching between °C and °F
- Probe interchangeability: compatible with standard 3.2 mm stainless-steel stem probes (type T or K optional via adapter)
- Factory-calibrated at three points (−10 °C, 25 °C, and 70 °C) with full calibration certificate available upon request
- Low-power architecture supporting up to 3000 hours of continuous operation on a single 1.4 V alkaline or silver-oxide cell
- Auto-off function after 10 minutes of inactivity to conserve battery life without compromising measurement readiness
- Stainless-steel probe tip with food-grade surface finish compliant with FDA 21 CFR Part 177.2600 for indirect food contact applications
Sample Compatibility & Compliance
The Checktemp Series accommodates direct contact measurement across heterogeneous sample matrices—including aqueous solutions, ambient air, semi-solid gels, frozen foodstuffs, and viscous pharmaceutical suspensions. Probe immersion depth is optimized for minimum 15 mm insertion to ensure thermal equilibrium without convective interference. Device compliance includes CE marking per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD); RoHS 2011/65/EU conformity is verified for all electronic components. While not classified as a medical device under MDR 2017/745, its accuracy profile meets the performance criteria specified in ISO 80601-2-56 for clinical thermometers when used with appropriate probe types and validation protocols. For GLP/GMP-regulated workflows, audit trails may be established using external logging software paired with optional RS232/USB data output modules.
Software & Data Management
Although the base model operates as a standalone instrument, optional firmware upgrades enable serial communication via ASCII protocol over USB or RS232 interfaces. This permits integration into LIMS or ELN platforms through configurable data export (CSV or TXT format) including timestamp, unit, and operator ID fields. All internal memory retains last 99 readings with time/date stamp—accessible via dedicated recall mode. Firmware supports user-defined offset correction (±5.0 °C max) for application-specific drift compensation, logged with audit trail metadata. When deployed in regulated environments, the device supports 21 CFR Part 11-compliant electronic records when paired with validated third-party software that enforces electronic signatures, role-based access control, and change history tracking.
Applications
- Verification of incubator, refrigerator, and freezer setpoints during preventive maintenance and temperature mapping studies
- In-process monitoring of sterilization cycles (e.g., autoclave chamber air temperature, dry-heat oven profiles)
- Raw material acceptance testing for thermal stability compliance in chemical and biopharmaceutical supply chains
- Environmental monitoring in cleanrooms per ISO 14644-1 and EU GMP Annex 1 requirements
- Calibration verification of fixed-mount temperature sensors using NIST-traceable transfer standards
- Field validation of cold chain logistics during vaccine or biologics distribution
FAQ
Is this thermometer suitable for measuring core temperature of solid food products?
Yes—when using the optional needle-probe accessory with ≥25 mm penetration depth and stabilization delay ≥15 s, it meets USDA FSIS and FDA Food Code guidelines for cooked product verification.
Does the device support calibration verification in accordance with ISO/IEC 17025?
Yes—the instrument’s documented uncertainty budget, traceable calibration certificate, and documented measurement procedure satisfy Clause 6.5 requirements for equipment verification.
Can the battery be replaced in the field without specialized tools?
Yes—the rear battery compartment features a screwless latch mechanism; replacement requires only a standard Phillips #0 screwdriver for seal verification post-replacement.
What is the recommended recalibration interval under routine laboratory use?
Annual recalibration is advised per ISO/IEC 17025 Clause 6.4.3; however, users must perform intermediate verification (e.g., ice-point check) before each shift in critical applications.
Is the probe autoclavable?
No—the standard probe is not rated for steam sterilization; autoclavable probe variants (Class B cycle compatible) are available under separate part numbers with PTFE-insulated cables and stainless-steel housings.
