BHK Elite Sealer-1 Program-Controlled Quantitative Sealing Machine for IDEXX Colilert®-Based Enzyme Substrate Assays

Overview

The BHK Elite Sealer-1 is a precision-engineered, microprocessor-controlled sealing instrument designed exclusively for quantitative microbial enumeration using the enzyme substrate method (ESM) with standardized IDEXX Colilert®-compatible 51-well and 97-well Quanti-Tray®/Quanti-Tray® 2000 plates. It operates on the principle of thermally activated, uniform pressure sealing to hermetically seal aqueous samples inoculated with chromogenic/fluorogenic substrates—ensuring anaerobic integrity, eliminating cross-contamination, and preserving assay validity throughout 24-hour incubation. Engineered for compliance with GB/T 5750.12–2023 (Standard Methods for Examination of Drinking Water – Microbiological Indicators) and HJ 1001–2018 (Determination of Total Coliforms and Escherichia coli in Water by Enzyme Substrate Method), the Elite Sealer-1 supports rapid, culture-independent detection of total coliforms, thermotolerant coliforms (fecal coliforms), and Escherichia coli in drinking water, surface water, wastewater, and reclaimed water matrices—without requirement for sterile hoods or laminar flow environments.

Key Features

• Programmable dual-mode sealing: Optimized thermal profiles for both 51-well (0–200 MPN/100 mL) and 97-well (0–2419 MPN/100 mL) trays—achieving full seal integrity in <14 seconds per tray
• High-reliability mechanical architecture: Rated for ≥50,000 sealing cycles with <0.1% failure rate; sealed tray leak rate verified at <1×10⁻⁶ mbar·L/s under vacuum decay test
• Intelligent human-machine interface: 7-inch color TFT touchscreen with real-time preheating progress bar, temperature compensation calibration, user password authentication, and dual-button navigation (forward/backward)
• Acoustically optimized design: Operating noise ≤48 dB(A) at 1 m distance; external housing surface temperature maintained <40°C during continuous operation
• Traceable process control: Embedded non-volatile memory logs seal count, timestamp, operator ID (if authenticated), and thermal profile selection—supporting GLP-compliant record retention

Sample Compatibility & Compliance

The Elite Sealer-1 is validated for use with all commercially available enzyme substrate media formats compatible with Quanti-Tray® geometry—including Colilert®, Colilert-18®, and Enterolert® reagents. It accommodates standard 100 mL water samples (unfiltered or membrane-filtered) directly loaded into trays following EPA Method 1604, ISO 9308-1:2014, and APHA Standard Methods 9223B. All sealing parameters conform to the physical requirements specified in ASTM D5673–22 (Standard Practice for Use of Quanti-Tray® Systems). The device itself carries CE marking per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and its operational documentation aligns with FDA 21 CFR Part 11 data integrity expectations for electronic records generated during environmental monitoring workflows.

Software & Data Management

No proprietary software installation is required. All operational parameters and usage logs are stored locally in encrypted EEPROM with read-only export capability via USB-C port (CSV format). Timestamped seal event logs include tray type (51/97), date/time, cycle count, and selected temperature mode (37°C or 44.5°C context)—enabling retrospective audit trails for laboratory accreditation (e.g., ISO/IEC 17025:2017 Clause 7.5.2). Optional integration with LIMS is supported via ASCII serial output (RS-232, 9600 bps, N-8-1) for automated transfer of seal completion signals and batch identifiers.

Applications

• Routine regulatory testing of potable water supplies per WHO Guidelines for Drinking-water Quality and China’s GB 5749–2022
• Wastewater treatment plant effluent monitoring under HJ 91.1–2019 and EU Urban Wastewater Treatment Directive (91/271/EEC)
• Beach water quality assessment programs requiring same-day E. coli quantification
• Field-deployable mobile labs where space, power stability, and sterility infrastructure are constrained
• Contract environmental laboratories performing high-throughput compliance testing for municipal and industrial clients

FAQ

Does the Elite Sealer-1 require sterilization or cleanroom conditions prior to use?

No. Unlike membrane filtration or pour-plate methods, ESM-based sealing does not demand aseptic technique—the device seals pre-inoculated trays under ambient conditions with no risk of airborne contamination.

Can it be used with non-IDEXX branded trays?

Only trays conforming precisely to IDEXX Quanti-Tray® dimensional and material specifications (e.g., polystyrene thickness, well depth, rim geometry) are guaranteed to achieve leak-tight seals. Third-party trays may yield inconsistent results and void warranty coverage.

Is temperature calibration traceable to national standards?

Yes. Each unit ships with a factory calibration certificate (NIST-traceable reference thermometer), and internal thermal sensors are field-verifiable using Class A PT100 probes per IEC 60751.

What maintenance is required to sustain 5-year service life?

Annual inspection of heating element resistance (±2% tolerance), pressure actuator alignment, and touchscreen calibration—documented in the included Maintenance Logbook per ISO 13485:2016 Annex C recommendations.