J-KEM 380/Timer Precision Temperature Controller

Overview

The J-KEM 380/Timer Precision Temperature Controller is an engineered solution for laboratory and pilot-scale thermal process control where repeatability, stability, and traceable calibration are critical. Designed and manufactured in the United States by J-KEM Scientific—a long-standing specialist in precision thermal instrumentation—the device operates on proportional-integral-derivative (PID) control architecture optimized for low-drift, high-resolution temperature regulation. It functions as both a standalone controller and a data-logging interface, supporting real-time monitoring and closed-loop feedback to external heating or cooling systems via its solid-state relay output. The controller is not a bath or circulator itself but serves as the intelligent regulatory unit for externally mounted heaters, Peltier modules, immersion baths, jacketed reactors, or oven chambers—making it integral to GLP-compliant thermal validation workflows and ISO/IEC 17025-accredited testing environments.

Key Features

• Microprocessor-based PID control with user-adjustable tuning parameters (P, I, D) for dynamic response optimization across diverse thermal loads.
• 0.1 °C resolution and ±0.1 °C display accuracy, calibrated against NIST-traceable references; factory calibration certificate available upon request.
• Dual-mode over-temperature protection: simultaneous audible alarm (85 dB @ 30 cm) and red LED warning—configurable threshold with hysteresis to prevent nuisance tripping.
• Integrated 100-hour programmable timer with auto-shutdown and hold-to-end functionality, supporting timed ramp-soak cycles without external logic.
• USB 2.0 interface compliant with CDC ACM class drivers; compatible with Windows 10/11 and macOS 12+ via native serial emulation.
• Support for four industry-standard sensor types: Type T (−200 to +250 °C), Type J (0 to +800 °C), Type K (−50 to +1200 °C), and PT100 (−200 to +400 °C); automatic cold-junction compensation applied for thermocouples.
• Front-panel push-button navigation with backlight LCD, designed for glove-compatible operation in fume hoods or cleanroom settings.

Sample Compatibility & Compliance

The J-KEM 380/Timer does not directly contact samples; instead, it interfaces with external temperature sensors placed in proximity to the sample environment (e.g., immersed in liquid media, embedded in solid matrices, or surface-mounted on reactor walls). Its sensor input circuitry meets IEC 61000-4-2 (ESD immunity) and IEC 61000-4-4 (EFT immunity) standards. For regulated industries, the controller supports audit-ready operation when paired with KEM-Net software: all setpoint changes, alarm events, and timer activations are timestamped and logged with operator ID fields (when integrated into networked lab systems). While the device itself is not FDA 21 CFR Part 11–certified, its data export (CSV/TXT) and KEM-IO API enable integration into validated LIMS or ELN platforms meeting ALCOA+ data integrity principles.

Software & Data Management

KEM-Net is a free Windows-based application providing real-time graphing, multi-channel logging (up to 8 virtual channels via daisy-chained units), and configurable alarm notifications (email/SNMP optional via third-party gateways). KEM-IO extends functionality through a COM-port-accessible command-line interface and DLL library for custom LabVIEW, Python (PySerial), or MATLAB automation scripts. All logged data include UTC timestamps, sensor type identification, raw mV/Ω values, and linearized temperature outputs—enabling post-hoc uncertainty analysis per GUM (JCGM 100:2008). Export formats comply with ASTM E2917-21 (Standard Practice for Calibration of Thermal Sensors) metadata requirements.

Applications

• Calibration laboratories performing temperature uniformity mapping of environmental chambers per ISO 17025 Clause 6.4.3.
• Materials science labs controlling thermal ramps during DSC sample prep or polymer annealing protocols.
• Pharmaceutical QC labs executing dissolution apparatus temperature verification (USP ).
• Chemical engineering pilot plants regulating jacket temperatures in glass-lined reactors during exothermic synthesis.
• Academic research groups implementing reproducible cryogenic conditioning of superconducting materials using liquid nitrogen-cooled stages.
• Food safety testing facilities validating holding temperatures in thermal abuse studies per FDA Food Code Annex 3-501.15.

FAQ

Does the J-KEM 380/Timer support RS-485 or Ethernet communication?

No—it features USB 2.0 only. For industrial networks, use a certified USB-to-RS-485 converter with Modbus RTU firmware compatibility.
Can multiple 380/Timer units be synchronized for multi-zone control?

Yes, via KEM-Net’s master-slave configuration mode using shared reference clocks and coordinated timer triggers.
Is the PT100 input 2-wire, 3-wire, or 4-wire compatible?

It accepts 2-wire and 3-wire PT100 configurations; 4-wire operation requires external signal conditioning.
What is the maximum load rating of the internal solid-state relay?

25 A resistive at 240 VAC; derating required for inductive or capacitive loads per IEC 60947-4-1.
Are calibration certificates included with shipment?

A basic factory calibration report is provided; NIST-traceable certificates with uncertainty budgets are available as a value-added service.