Calibration calibration bath CTR-25

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Overview
The Kaye CTR-25 is a portable liquid bath calibrator designed for on-site calibration and verification of temperature data loggers and process sensors in regulated (GxP) environments. It combines broad temperature coverage, fast thermal response and high stability in a compact stainless-steel portable unit suitable for laboratory or facility use.

Integrated functionality
The CTR-25 firmware supports automatic real-time verification of ValProbe RT loggers when used with the traceable Kaye IRTD-400 standard, and manual checks of standard ValProbe loggers. The unit includes a dedicated holder for parallel verification and simplifies routine in-field checks to reduce downtime associated with off-site calibration.

Typical applications

• Steam-in-Place (SIP): 122 °C to 140 °C
• Steam sterilization / autoclave verification: 121 °C to 135 °C
• Bioreactor sensor calibration: -10 °C to 100 °C
• Cold storage/freezer verification: down to -25 °C
• General process validation across -25 °C to +140 °C

User-friendly and low maintenance
The CTR-25 features a colour display showing date, time and bath temperature. A sealed stainless-steel housing with carrying handle, integrated overflow and drain tubing facilitate transport, medium changes and field operation. The valve/holder arrangement accommodates up to 10 ValProbe loggers for simultaneous verification.

Features

• Temperature range: -25 °C to 140 °C
• High stability: 0.01 °C; typical uniformity up to 0.02 °C
• Fast heating and cooling rates; typical settling time ~10 minutes
• Simultaneous verification of up to 10 Kaye ValProbe / ValProbe RT loggers
• Compressor-free Peltier temperature control
• Stainless-steel sealed housing; portable design (approx. 20 kg / 44 lb)
• Fluid volume: 2.5 L; working area: 75 x 75 mm; max fluid depth: 154 mm
• Interfaces: RS-232, USB 2.0 device & host
• Universal power supply 115/230 V AC, 50/60 Hz; Max power 1150 W
• Factory NVLAP-accredited calibration certificate included (NVLAP LAB CODE 200913-0)

Applications (examples)

• Autoclaves and steam sterilizers
• Water spray sterilizers
• Cleaning and disinfection equipment
• Fermenters and bioreactors
• Refrigerators, cold rooms and stability chambers
• Incubators, isolators and warehouse storage

Temperature specifications
Range (at 25 °C ambient): –25 °C to 140 °C (closed cover)
Accuracy (maximum permissible error): 0.1 °C
Display resolution: 0.01 °C
Stability: 0.01 °C
Typical uniformity: 0.02 °C
Repeatability: 0.04 °C
Typical heating time: –25 °C to 25 °C: 35 min; 25 °C to 140 °C: 55 min
Typical cooling time: 140 °C to 25 °C: 45 min; 25 °C to –25 °C: 75 min
Typical settling time: 10 min

General Specifications
Size (HxWxD): 382 x 242 x 400 mm (15 x 9.5 x 15.7 in)
Weight: 20 kg (44 lb)
Fluid volume: 2.5 liters (0.66 gallons)
Fluid working area: 75 mm x 75 mm (3 in x 3 in)
Maximum fluid depth: 154 mm (6.1 in)
Factory calibration: NVLAP accredited certificate included (NVLAP LAB CODE 200913-0)
Remote interface: RS-232 / USB 2.0 device / USB 2.0 host
Supply voltage: 115 V / 230 V AC, 50/60 Hz
Power consumption: Max 1150 W

Technical specifications

• Model: CTR-25
• Temperature range: -25 °C to 140 °C
• Accuracy: 0.1 °C; display resolution: 0.01 °C
• Stability: 0.01 °C; typical uniformity: 0.02 °C; repeatability: 0.04 °C
• Fluid volume: 2.5 L; working area: 75 x 75 mm; max depth: 154 mm
• Simultaneous calibration: up to 10 Kaye ValProbe / ValProbe RT loggers
• Construction: stainless-steel housing, carrying handle, drain and overflow tubes
• Interfaces: RS-232, USB device & host
• Power: universal 115/230 V AC 50/60 Hz; max 1150 W
• Factory calibration: NVLAP-accredited certificate (NVLAP LAB CODE 200913-0)