Precision. Stability. Usability. Across the full temperature spectrum.
The RTCt‑Series delivers the industry’s most advanced dry‑block calibration performance, built for professionals who require complete confidence, high stability, and a streamlined user experience from deep‑cold to high‑temperature applications. Designed for both laboratory and field environments, RTCt calibrators combine cutting‑edge control technology, intelligent sensor integration, and a modern touchscreen interface to ensure fast, accurate, and fully traceable temperature calibrations.
A Unified Platform for Every Calibration Need
All RTCt calibrators share a powerful core platform—ensuring consistent operation, intuitive workflows, and superior temperature control across the series.
Intuitive Touchscreen Interface
The RTCt interface provides clear navigation with:
- Real‑time adaptive graphing
- Highlighted active inputs for error‑free operation
- Quick access to Calibration, Auto Step, Auto Calibration and Switch Test modes
Real‑Time Adaptive Graphing & Wireless Connectivity for Remote Control
The display automatically adjusts resolution when stability criteria are met, revealing micro‑deviations that conventional graphs would overlook. Every RTCt model includes Wi‑Fi for browser‑based monitoring and control—ideal for cleanrooms, production lines, or automated workflows.
Dynamic Load Compensation (DLC) & Dual‑Sensor Input for Parallel Calibration
Patented DLC technology monitors and compensates for thermal differences caused by sensor mass or multiple probes—maintaining uniform well temperature even in demanding conditions. Most RTCt models allow simultaneous calibration of two sensors to reduce downtime and increase throughput.
Flexible, Automated Workflows
- Auto Step (up to 20 programmable steps)
- Switch testing with automatic open/close/hysteresis capture (Model B)
- Built‑in screenshot for instant documentation
Full Temperature Coverage: From –100°C to +700°C
The RTCt‑Series supports calibration across the industry’s widest dry‑block temperature span. Each model is optimized for specific calibration ranges and industry needs.
RTCt‑159 — Ultra‑Cool Dry‑Block Calibrator
- –100°C to +155°C
- Dual‑zone control for superior homogeneity
- Active DLC for extreme temperature uniformity
- Parallel dual‑sensor calibration
- Ideal for deep‑cold applications in pharma, aerospace and cryogenic instrumentation
RTCt‑156 & RTCt‑157 — Universal Mid‑Range Calibrators
- –32°C to 155°C (156)
- –45°C to 155°C (157)
- Dual‑zone heating
- High accuracy and excellent stability for general laboratory and industrial use
RTCt‑168 — Dry/Wet Hybrid for Sanitary Sensors
- –30°C to 165°C
- Supports wet and dry calibration
- Designed for thick or sanitary‑style probes
- Perfect for food & beverage and pharmaceutical production
RTCt‑700 — High‑Temperature Reference Calibrator
- 33°C to 700°C
- Triple‑zone heating ensures exceptional axial uniformity
- DLC (B & C models) for consistent temperature distribution regardless of sensor mass
- Serves high‑temp industries such as power generation, metals and aerospace
Built for Regulated, High‑Accuracy Industries
The RTCt‑Series is trusted across sectors where documentation, compliance, and repeatability are essential:
- Pharmaceutical & biotech
- Food & beverage production
- Aerospace component testing
- Automotive and EV development
- Energy & power generation
- Industrial automation and quality control
Accessories & System Enhancements
Multi‑Hole Inserts (Metric & Imperial) & Special Carrying Case
Accommodates a wide range of sensor diameters with space for reference and DLC sensors. Compartmentalized, protective, and optimized for field portability—fits sensors, inserts, and support tools.
JofraCal Calibration Software
- Automates sensor calibration routines
- Generates certificates
- Integrates with ASM scanner for calibrating up to 24 sensors simultaneously
Model Selector
Use this guide to choose the right RTCt calibrator for your application:
| Model |
Temperature Range |
Type |
Heating Zones |
DLC |
| RTCt-159 |
-100 to 155°C/-148 to 311°F |
Dry Block |
Dual |
Yes |
| RTCt-156 |
-32 to 155°C/-26 to 311° |
Dry Block |
Dual |
Yes |
| RTCt-157 |
-45 to 155°C/-49 to 311°F |
Dry Block |
Dual |
Yes |
| RTCt-168 |
-30 to 165°C/-22 to 329°F |
Dry Block & Bath |
Dual (Wet/Dry) |
Yes |
| RTCt-700 |
33 to 700°C/91 to 1292°F |
Dry Block |
Triple |
Yes |
