LEFOO TSH Dual Compressor Oil and Discharge Temperature Controller
LEFOO TSH is a dual compressor oil/discharge temperature protection for compressor oil and discharge sensing bulbs. The distinction between a flow, pressure, temperature, protective or remote-actuator contact matters when selecting replacements.
Model Identification & Key Specifications
Original Manufacturer Data
TSH has two distinct sensing bulbs for compressor discharge HIGH temperature and sump OIL temperature, shutting down if either trip is exceeded; this is not TSD’s subtraction of two temperatures. TSH160 low-side 50–110°C with 10–30°C adjustable difference and high-side 80–160°C with ≤15°C; TSH160HM manually resets high side, TSH160LHM manually resets BOTH. Original bulb ceilings low 130°C and high 180°C. Engineer manual reset topology before replacing any compressor protective controller.
Match the original sensor bulb and mounting, ambient/media operating range, automatic/manual reset circuit, inductive load and exact order code. A thermal trip is not identical to a pressure trip. No independently matched OEM model photo or current exact order-code ATEX/IECEx approval is claimed.
AirAlign Engineering & Variant Comparison
Two distinct temperature trips protect compressor oil and discharge independently. Manual reset after an over-temperature event is a safety behavior, not a convenience option. The low and high bulb maximum temperatures differ, so installer routing must be coordinated with the actual thermal zones.
Always identify whether the part measures a continuously variable signal, provides a discrete protective trip or controls an operating cycle. Component substitution should preserve sensing topology, switching hysteresis, reset and energized/deenergized states. Enclosure and cable routing must be assessed within the actual equipment, not only against a standalone catalogue illustration.
Installation and Integration Checks
Check supply voltage, relay versus transistor wiring, contact NO/NC state and peak inductive duty. Signal outputs are not equivalent to motor-control contacts.
Distinguish temperature difference from independent thermal limits, and paddle/piston/calorimetric flow measurement from pressure differential. Match actual calibration media.
Mount as specified for the device’s reference sensor or mechanical paddle; verify working medium, housing, ingress protection, maximum process temperature and cable/port fittings.
Confirm applicable safety function and approvals for the exact order-code revision. CE/UL/TÜV product claims do not establish ATEX/IECEx protection without matching certificate scope.
Related Products
LEFOO TS · LEFOO TSD · LEFOO manufacturer profile
Official Manufacturer Sources
Independent AirAlign engineering page. Device-specific maker photo and current exact-variant third-party approvals require separate verification.
TSH — dual compressor temperature protection
TSH is a dual-bulb temperature protection controller for compressor oil and discharge-temperature monitoring. Place the two sensing bulbs on the correct distinct measurement points; one bulk ambient reading cannot represent both lubrication and discharge overheating. The actual protection thresholds, contact logic, reset behavior and manufacturer compressor compatibility must be evaluated together. A capillary switch’s rated contacts and proof requirements are separate from its sensing temperature range.