Temperature calibrator LTR-90

dry blockultra low-temperaturehigh temperature

Description
The Kaye LTR-90 is an ultra-cool dry well calibrator engineered for portable, on-site temperature sensor calibration. Operating from −90°C to +140°C, it provides fast response, excellent stability and automated calibration workflows when used with Kaye IRTD probes and Kaye Validator software. The unit includes multiple ergonomic and protection features—carry handles and a rubber dry-well insulator cap—to support field use and prevent frost buildup. Calibrating sensors in their actual operating environment eliminates system temperature-coefficient errors and improves measurement traceability.

Features

• Operating range: −90°C to +140°C (ultra-cool dry block)
• Stirling cooling: reaches −90°C in ~80 minutes
• Temperature stability: ±0.015°C (typical stability 0.02°C in spec table)
• Axial uniformity: 0.05°C across full range
• Custom block: 2 reference IRTD wells + 4 inserts (3 thermocouples per insert)
• Software interface with Kaye Validator for automated sensor calibration
• Rubber insulator cap to reduce frost
• Ergonomic industrial design with two-handle carry
• Approx. weight: 16 kg (see technical specs for 13.6 kg value)

Applications

• Autoclaves / steam sterilizers
• Washer‑disinfectors
• Fermenters
• Steam‑in‑Place (SIP)
• Freezers / refrigerators
• Freeze dryers
• Cold rooms
• Ultra‑low freezers
• Stability chambers
• Incubators
• Warehouses and environmental mapping
• Glove boxes / isolators

Technical specifications

• Model: LTR-90
• Temperature stability: 0.02°C (typical; see feature note ±0.015°C)
• Transfer calibration accuracy (IRTD to thermocouples): –40°C to –25°C: ±0.15°C; –25°C to 80°C: ±0.10°C; 80°C to 130°C: ±0.15°C
• Typical heat‑up: 25°C → 80°C: 6 minutes; 25°C → 140°C: 14 minutes
• Typical cool‑down: 23°C → −90°C: 80 minutes; 140°C → 23°C: 60 minutes
• Well configuration: Fixed insert; Reference wells (2): 6.7 mm Ø × 155 mm deep; Calibration wells (6): 9 mm Ø × 155 mm deep
• Display: LED, 0.01°C resolution
• Computer interface: RS232
• Dimensions: 343 mm × 198 mm × 318 mm
• Weight: 13.6 kg (technical table)
• Power: 115 VAC 60 Hz, 3 A or 230 VAC 50 Hz, 1.5 A; 350 W
• Compatibility: Works with Kaye IRTD probes and Validator 2000 / Validator AVS / ValProbe RT / RF ValProbe software or as stand‑alone via front panel controls