Otisience MH-2800A Multi-Function Dry Block Thermostat
| Brand | Otisience |
|---|---|
| Model | MH-2800A |
| Origin | Tianjin, China |
| Temperature Range | Ambient +5 °C to 200 °C |
| Temperature Stability | ±0.1 °C |
| Temperature Accuracy | ±0.15 °C |
| Over-Temperature Protection | 200 °C |
| Deviation Alarm Threshold | Setpoint +5 °C |
| Timer Range | 1–999 min |
| Display | Dual 4-digit LED (setpoint & actual temperature) |
| Block Capacity | 2 standard blocks or 1 double-size block |
| Heating Power | 400 W / 220 V / 50 Hz |
| External Dimensions | 240 mm (W) × 92 mm (H) × 215 mm (D) |
| Chamber Dimensions | 150 mm (W) × 51 mm (H) × 95 mm (D) |
Overview
The Otisience MH-2800A Multi-Function Dry Block Thermostat is a precision-engineered thermal management system designed for consistent, repeatable sample heating in analytical, biochemical, and pharmaceutical laboratories. Unlike liquid bath or air-circulating ovens, this instrument employs solid-state dry block technology—where aluminum or stainless-steel heating blocks conduct heat directly to sample vessels via conduction—ensuring rapid thermal equilibration, minimal evaporation loss, and high spatial uniformity across multiple wells. Its microprocessor-based PID temperature control architecture delivers stable setpoint maintenance within ±0.1 °C over time, with resolution and adjustment increments of 0.1 °C. The dual 4-digit LED display provides simultaneous real-time monitoring of both user-defined setpoint and measured block temperature—critical for method validation and audit readiness under GLP or ISO/IEC 17025 frameworks.
Key Features
- Microprocessor-controlled PID temperature regulation with auto-tuning capability for optimal response across the full operating range (ambient +5 °C to 200 °C)
- Dual independent 4-digit LED display showing setpoint and actual block temperature—enabling immediate visual verification of thermal deviation
- Programmable timer (1–999 minutes) with audible end-of-cycle alert and automatic power-down option
- Two-stage thermal safety system: fixed upper limit cutoff at 200 °C plus configurable deviation alarm triggered when block temperature exceeds setpoint by >5 °C
- Modular block design supporting interchangeable aluminum or stainless-steel inserts with standardized well geometries (e.g., 13 mm, 16 mm, 18 mm diameters), ensuring compatibility with common international tube formats including those from Thermo Fisher, Eppendorf, and VWR
- Compact footprint (240 × 92 × 215 mm) optimized for benchtop integration without compromising thermal mass or stability
- 400 W heating capacity delivered at 220 V / 50 Hz, enabling rapid ramp rates and recovery after sample insertion
Sample Compatibility & Compliance
The MH-2800A accommodates a wide range of sample containers—including glass and plastic test tubes, microcentrifuge tubes, PCR strips, and small vials—via user-selectable heating blocks. All standard blocks conform to ISO 8573-1 purity class requirements for non-contaminating thermal surfaces and are passivated to resist corrosion during repeated exposure to aqueous or mildly acidic reagents. The device meets electromagnetic compatibility standards per IEC 61326-1 and electrical safety requirements under IEC 61010-1 for laboratory equipment. While not certified as medical-grade hardware, its temperature accuracy, traceable calibration support, and deviation logging functionality align with routine QC/QA workflows governed by USP , ASTM E2877, and internal SOPs requiring documented thermal performance.
Software & Data Management
The MH-2800A operates as a standalone instrument with no embedded software or network interface; however, its analog/digital hybrid control architecture supports external data acquisition via optional RS-232 or USB-to-serial adapters (sold separately). When integrated with validated third-party DAQ systems, users can record timestamped temperature logs compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, audit trails, and secure data export. Calibration certificates traceable to NIM (National Institute of Metrology, China) are available upon request, and the unit includes dedicated calibration mode for field verification using certified reference thermometers.
Applications
- Enzyme reaction incubation (e.g., restriction digests, ligations, dephosphorylations) requiring precise thermal hold at 37 °C, 50 °C, or 65 °C
- Sample thawing and pre-warming prior to HPLC injection or spectrophotometric analysis
- Standard curve preparation in ELISA and immunoassay workflows
- Controlled denaturation studies in protein biochemistry
- Stability testing of reference standards under accelerated conditions (e.g., 40 °C/75% RH protocols)
- Reagent activation in molecular diagnostics—including hot-start PCR master mix conditioning
FAQ
Is the MH-2800A suitable for use with volatile organic solvents?
No—this instrument is intended for aqueous or low-volatility samples only. Do not place flammable, corrosive, or highly volatile substances inside the block chamber.
Can the heating blocks be calibrated independently?
Yes—each block may be individually characterized using an external reference thermometer; the controller allows offset correction per block configuration.
Does the unit support external temperature probes for chamber monitoring?
Not natively—the built-in sensor measures block surface temperature only. For ambient or vessel-bottom profiling, external PT100 or thermocouple inputs require third-party DAQ integration.
What maintenance is required to ensure long-term accuracy?
Annual verification against a NIST-traceable reference source is recommended. Clean blocks regularly with isopropyl alcohol and lint-free wipes; avoid abrasive cleaners or thermal shock from rapid cooling.
Is firmware upgrade capability available?
No—the MH-2800A uses fixed-function embedded logic with no field-upgradable firmware. All operational parameters are hardware-configured at manufacture.
