OVERVIEW
• LVIT Technology(Linear Variable Inductance Transducer)
• UL and CUL approved for Class 1 Div 2 Groups C and D locations
• Contactless operation prevents wearout from dithering or cycling
• Excellent stroke-to-body ratio
• Full Scale ranges from 0.1 to 30 inches (2.5 to 750 mm)
• Environmental rating of IP67 (Dust tight, Short term water immersion)
• Through-bore design eliminates mechanical overstroking
• Proprietary SenSetfield adjustable range scaling
• DC in / DC out operation with built-in electronics
MADE IN THE USA
UL approved for use in Hazardous Locations
The LZ-19 Series of LVIT (Linear Variable Inductance Transducer) position sensors are contactless devices designed for use in hazardous locations such as oil and gas exploration, power generation valve feedback and chemical/food processing where UL approval is required.
The LVIT is offered in nominal full scale ranges from 0.1 to 30 inches (2.5 to 750 mm) with an excellent stroke-to-length ratio. The sensor has a 19 mm (3/4 inch) outside diameter stainless steel with a 1 m axial cable for I/O connections. The 6 mm (0.236 inch) diameter through-bore of an LZ-19 provides clearance for its 5.2 mm (0.200 inch) diameter, PVDF-sheathed moving rod, which is made of the same material as its housing. This through-bore feature also means that the sensor is not subject to damage from typical mechanical overstroking.
Options:
TECHNICAL SPECIFICATIONS
| Analog I/Os: | 0-5 V or 0.5-4.5 V output with 8 -30 V input, 35 mA max. 0-10 V output; 12—30 V input; 35 mA max. 4-20 mA (3-wire sourcing) output; 18-30 V input, 60 mA max (75 C max). |
| Measuring Ranges: | 0.10 to 30 inches (2.5 to 750 mm) full scale (nominal) |
| Linearity Error: | ± 0.15% of Full Scale Output (FSO) typical, ± 0.25%max |
| Resolution: | 0.025% of full stroke |
| Update Rate: | 300 Hz (3.3 mS) |
| Operating Temperature: | -20 to 85 C (-40 to 105 C Extended Range) |
| Output: | 0 to 5 VDC or 0 to 10 VDC |
| Temperature Coefficient: | ≤0.015% of FS/deg C |
| Vibration: | 5-20 Hz, 0.5 inch p-p; 20-2000 Hz, 4.2 g p-p |
| Shock: | 1000 g, 11 msec |
| Terminations: | IEC IP-67 |
| Humidity: | 95% Max. RH (non-condensing) |
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LZ-19-UL Series UL Approved Linear Variable Inductance Transducer (LVIT) Position Sensor
Product Overview
The LZ-19-UL Series Linear Variable Inductance Transducer (LVIT) from Harold G. Schaevitz Industries is an advanced linear position sensor specifically engineered for hazardous location environments. With UL and CUL approvals for Class I, Division 2, Groups C and D hazardous areas, this sensor is ideally suited for industries such as oil and gas, chemical processing, and power generation where both durability and hazardous location certification are essential.
Designed with contactless LVIT technology, the LZ-19-UL Series offers exceptional reliability, longevity, and resistance to environmental challenges, making it the go-to solution for critical position monitoring in demanding applications.
Key Features
UL and CUL Approved for use in Class I, Division 2, Groups C and D hazardous locations
Contactless Inductive Technology prevents wear from dithering and cycling
Stroke ranges from 0.1 to 30 inches (2.5 to 750 mm)
Through-bore design eliminates risk of mechanical over-stroking
Compact 19 mm (0.75 inch) diameter stainless steel housing
Excellent stroke-to-body length ratio for efficient installation in tight spaces
IP67 environmental rating for protection against dust and water ingress
Built-in signal conditioning electronics for DC input/output operation
SenSet™ Field Programmability for easy zero and span adjustment
Made in the USA
Hazardous Location Certified
The LZ-19-UL is certified by UL and CUL for use in Class I, Division 2, Groups C and D hazardous environments where flammable gases or vapors may be present. This makes it ideal for applications in:
Oil and gas wellheads and pipeline monitoring
Chemical processing equipment
Food and beverage processing areas with potential vapor hazards
Power generation systems requiring position feedback on turbine and valve actuators
Advanced LVIT Technology
Utilizing HGSI’s proprietary Linear Variable Inductance Transducer (LVIT) technology, the LZ-19-UL Series provides contactless linear position measurement, eliminating the mechanical wear, noise, and signal drift issues associated with traditional potentiometers. With no moving electrical contacts and robust internal electronics, the sensor offers reliable long-term operation even in vibration and high-cycle installations.
Through-Bore Design for Added Protection
The LZ-19-UL Series features a 6 mm diameter through-bore to accommodate a 5.2 mm PVDF-sheathed rod, creating a protected, wear-resistant internal motion system. The through-bore design provides an important mechanical advantage: elimination of sensor damage from overtravel. This is critical in field environments where mechanical motion may exceed expected limits.
Applications
Oil and Gas Exploration
Safely monitor valve positions and actuator movements in hazardous wellhead environments or pipeline systems where flammable gases may be present.
Power Generation
Used for feedback in turbine throttle, governor, and bypass valves, the LZ-19-UL stands up to heat, vibration, and electrical noise typical of generation environments.
Chemical and Food Processing
The stainless-steel housing and IP67 protection make the sensor ideal for installations in washdown or vapor-heavy areas in processing plants.
Industrial and Mobile Equipment
When position feedback is required in rugged environments with exposure to chemicals, dust, or harsh outdoor conditions, the LZ-19-UL delivers dependable results without failure.
Electrical Integration
With DC input/output operation and integrated signal conditioning, the LZ-19-UL simplifies installation and system integration. The sensor interfaces easily with most PLCs, control systems, and data acquisition units—no external signal conditioner required.
SenSet™ Field Programmability
Every LZ-19-UL sensor includes SenSet™, HGSI’s proprietary field calibration feature that allows zero and full-scale output adjustment with a simple two-step procedure—no programming tools required. This feature:
Speeds up installation and setup
Allows for easy calibration around application-specific mechanics
Reduces the need for custom firmware or sensor variants
Built for Harsh Environments
The stainless steel housing, PVDF-sheathed moving rod, and IP67 rating make the LZ-19-UL an ideal sensor for applications requiring resistance to:
Water immersion
Dust and fine particulates
Temperature variations
Mechanical vibration and shock
Why Choose the LZ-19-UL?
Certified by UL and CUL for use in Class I, Division 2, Groups C and D hazardous locations
Through-bore design eliminates overstroke risk
Built-in signal electronics – no external signal conditioner needed
SenSet™ programmable output scaling
Compact size, durable materials, and Made in the USA
Need help selecting the right configuration?
Contact HGSI’s expert application engineers today for support, specs, and integration assistance.