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Level Transmitters Probes & Gauges

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Level Transmitters, Probes & Gauges

Level Transmitters, Probes, and Gauges provide level measurement based on the height of a material's surface within a container or system. It is a critical parameter in many industrial and environmental processes, ensuring that operations run smoothly and safely. Level measurement can be conducted using a variety of techniques, including mechanical, ultrasonic, radar, and laser sensors, each suited to different application needs based on the material's properties, the measurement environment, and the required accuracy.

Accurate level measurement is vital for process control, maintaining quality, and ensuring safety in industries ranging from chemical manufacturing to water treatment. The choice of level measurement technology is influenced by factors such as the presence of vapors, pressure, temperature, and the physical and chemical properties of the material. Modern level measurement solutions offer versatility and precision, facilitating efficient process management and control. Below, you will find a comprehensive list of our transmitters, probes, and gauges, each engineered to meet the highest standards of quality and reliability.

Types of Level Transmitters, Probes & Gauges

Capacitive Level Displacer Bypass Float Guided Rod Guided Wave Radar
Magnetic Level Gauges Pressure Ultrasonic Level Transmitters

Products

BA
Displacer Type Level Gauge

Measuring Range up to 230" | 2"...4" ANSI Flange | up to 480 °F | Adjustable Setpoint Switches | Analog, Hart, Profibus-PA

Starting at $6,485
BA - Displacer-Type Level Gauge
Maximum Measuring Distance
230 Inches
Fittings
2"...4" ANSI Flange
Accuracy
± 0.2 inch
Media Density
25...125 Lb/Ft3
Max. Pressure
Per Flange Rating
Operating Temperature
-40...480 °F (250 °C)
    316 Stainless Steel Wetted Parts
    Measuring Range to 230 Inches
    Optional Adjustable Setpoint Switches
    Optional Stilling Wells for Agitated Tanks
    Analog Output, HART® and Profibus-PA® Available
    Sample Applications: Storage Tanks, Stirring Tanks, Water Tanks, and Tanks with Aggressive Media
View Full Product Info
KPW
Submersible Pressure Transducer

50 in H20...300 PSIG | High Overpressure Protection | Fast Response Time | Advanced Piezoresistive Sensing Technology

Starting at $1,128
Fast Delivery
KPW - Submersible Pressure Transducer
Ranges
50 in H20...300 PSIG
Accuracy
± 0.25% FS (Standard), ± 0.125% FS (Option)
Fittings
ABS or Optional SS Weighted Nose Cone
Wetted Parts
316 SS, ABS, Polyurethane
Available Outputs
4-20 mA, 0-5 VDC, 0-10 VDC, 0.5-2.5 VDC
    Advanced Piezoresistive Sensing Technology
    Variety of Output Signals
    CE EMI Compliant
    High Overpressure Protection
    Fast Response Time
    Stainless Steel Sensor Construction
    Quick Delivery
    Sample Applications: Irrigation, Tank Monitoring, Water and Wastewater, and Well Head Measurement
View Full Product Info
MM
Reed Chain Float Level Sensor

Made in the USA | up to 236" | up to 435 PSIG | up to 260 °F | SS, PVC, PP, or PVDF | 3/8"...2" NPT or 1-1/2"...4" ANSI Flange | Constant Level Indication

Starting at $614
Fast Delivery
MM - Reed Chain Level Sensor
Max. Measuring Length
236" (6000 mm)
Max. Pressure
435 PSIG (30 bar)
Max. Temperature
266 °F (130 °C)
Available Wetted Materials
Stainless Steel, PVC, PP, PVDF
Fittings
⅜"...2" NPT, ANSI 1½"...4" Flange
    Simple and Reliable Design with Only One Moving Part
    Constant Level Indication Regardless of Conductivity, Pressure and Temperature
    Output Signal is Directly Proportional to the Liquid Level
    Made in the USA
    Quick Delivery
View Full Product Info
NBK
Standard Magnetic Level Gauge

Made in the USA | Long measuring lengths for deep tanks | High pressure & temperatures

Starting at $1,287
Fast Delivery
NBK - Magnetic Level Gauge
Max. Measuring Length
18 ft, Longer with Extended Design
Fittings
½"...1¼" NPT, ½"...2" ANSI Flange
Wetted Materials
316-Ti SS, Titanium
Max. Pressure
Flanged per ASME B 16.5 RF-2009 / NPT to 3600 PSIG
Max. Temperature
750 °F (400 °C)
Options
Resistive Transducer, 4-20 mA Transmitter, Switches, Measuring Scale
    KOBOLD Circular Magnet System is Effective from All Sides
    Media Temperatures to 750 °F
    Industrial Ruggedness
    Made in the USA
    Top Seller
    Sample Applications: Storage Tanks, Tanks on Ships, Agitator Vessels, and Water Tanks
    BABA (Build America, Buy America) complaint
View Full Product Info
NBK-04
Top-of-the-Tank Mount Magnetic Level Gauge

Made in USA | Designed for installation into underground tanks | Depths from 20" to 157" | Max 230 PSIG & 250 °F

Starting at $873
Fast Delivery
NBK-04 - Tank-Top Mounted Level Indicator
Max. Measuring Length
13 Ft.
Fittings
2", 2½", 3", 4" ANSI Flange
Material
316-Ti SS
Max. Pressure
230 PSIG
Max Temperature
250 °F (120 °C)
Options
4-20 mA Analog Transmitter, Switches, Measuring Scale
    Measuring Depths from 20"...157"
    Maximum Pressure to 230 PSIG
    Maximum Temperature to 250 °F (120 °C)
    Highly Visible Level Indication for Underground Tanks
    Made in the USA
    Top Seller
    Sample Applications: Storage Tanks, Tanks on Ships, Agitator Vessels, and Water Tanks
    BABA (Build America, Buy America) complaint
View Full Product Info
NBK-M
Mini Magnetic Level Gauge

Made in the USA | Up to 9.8 feet in length | Up to 580 PSIG & 390 & 390 °F

Starting at $743
Fast Delivery
NBK-M - Economical Level Indicator
Max. Measuring Length
9.8 Feet
Fittings
½"...1" NPT, ½"...1" ANSI or DIN Flanges
Material
316 SS Tube & Fittings, Titanium Float
Max. Pressure
580 PSIG
Max. Temperature
390 °F (200 °C) (Option Dependent)
Transducer Accuracy
Max. ± 0.04" (with Option "T")
Available Options
Switches, Transmitters, Scales
    Economical Rugged Design
    316 SS Tube & Fittings, Titanium Float
    Maximum Pressure to 580 PSIG
    Maximum Temperature to 390 °F
    Measuring Lengths to 9.8 Feet
    Made in the USA
    Top Seller
    Sample Applications: Storage Tanks, Tanks on Ships, Agitator Vessels, and Water Tanks
    BABA (Build America, Buy America) complaint
View Full Product Info
NEO
Ultrasonic Level transmitter

up to 39 feet | 3" or 6" Beam Width | 8" or 18" of Dead Band | 2" or 3" NPT | up to 176 °F | up to 30 PSI | Reliable even with Condensation | Corrosion Resistant

Starting at $1,157
Fast Delivery
NEO - Ultrasonic Level Transmitter
Maximum Range
19 or 39 feet
Dead Band
8 or 18 inches
Fittings
2" or 3" NPT
Accuracy
± 0.2% of Range
Temp. Range
-31...140 °F (60 °C) or -40...176°F (80 °C)
Pressure Rating
30 PSI
Output
4-20 mA, 2-Wire
    Configuration via Push-Button or NEOCal software
    Compact and Easily Installed
    Resolution of 0.079" or 0.196"
    Non-contact Sensor
    Reliable Measurement even with Condensation
    Beam Width of 3" or 6"
    Corrosion Resistant PVDF Transducer
    Fail-safe Diagnostics with Selectable Signal Fail-safe Outputs
    Intrinsically Safe Versions are Available
    Quick Delivery
View Full Product Info
NGM
Guided Wave Radar Level Transmitter

Made in the USA | Up to 65 feet of measurement | Ideal for tanks with difficult geometry | Modular probe design

Starting at $1,791
NGM - Guided Wave Radar Level Transmitter
Measuring Range
Liquids up to 65 Feet
Fittings
3/4" NPT, G 3/4, ANSI Flange 1½"...4", DIN Flange DN40...DN100
Wetted Parts
St. Steel, PTFE
Operating Pressure
-14.5...580 PSIG
Media Temperature
-320...480 °F (250 °C)
Accuracy
± 3 mm or 0.03% of Measured Value
Power Supply
12-30 VDC, 4-Wire
Output
4-20 mA, PNP Switching Output
    Suitable for Many Liquids and Light Solids
    Independent of Density, Temperature, Pressure and Humidity
    Modular Probe Design
    Complete Galvanic Insulation of Device Electronics
    Made in the USA
    Ideal Solution for Tanks with Difficult Geometry
    BABA (Build America, Buy America) complaint
View Full Product Info
NGR
Guided Wave Radar Level Transmitter

Made in the USA | 4" to 13 Foot Probe | up to 145 PSIG | up to 212 °F | Small Inactive Areas | Quick to Commission

Starting at $1,120
NGR - Guided Wave Radar Level Transmitter
Probe Length
4"...13'feet
Maximum Pressure
145 PSIG
Media Temperature
-4 °F...212 °F (100 °C)
Wetted Parts
316L St. Steel, PTFE
Output Measurement
4-20 mA Continuous, Transistor Switch
    No Mechanical Moving Parts
    Measurement is Independent of Density, Temperature, Pressure and Humidity and Conductivity
    Compact and Rotatable Housing Ensures Flexible Installation
    Small Inactive Areas, Ideal for Small Vessels
    Time and Cost Savings Due to Low Maintenance and Quick Commissioning
    Made in USA
View Full Product Info
NMC
Capacitive Level Transmitter

11" to 157" Probe | up to 435 PSIG | up to 390 °F | 4-20 mA, 2-wire

Starting at $1,281
NMC - Capacitive Level Transmitter for Liquids
Probe Length Range
11" to 157"
Max. Pressure
435 PSIG (30 Bar)
Max. Media Temperature
Up to 390 °F (200 °C)
Input Power
18...36 VDC, 24 VAC, 110 VAC, 230 VAC, 50/60 Hz
Output
4-20 mA, 2-wire
    Capacitive Monitoring Principle
    Measurement of Liquid Levels in Tanks
    No Moving Parts
    Four Designs for Various Applications
    Sample Application Media: Water, Water-like Liquids, Liquid Foods, Chemicals, Aggressive Liquids, Pharmaceutical Liquids, and Oils
View Full Product Info
NML
Float Level Transducer

Max Length of 96" | up to 800 PSIG | up to 250 °F | 316 SS or NBR Float | Resistive or 4-20mA, 2-wire

Starting at $447
NML - Float Level Transducer
Max. Measuring Length
96"
Float Material
316 SS or NBR
Max. Pressure
800 PSIG
Max. Media Temperature
250 °F (120 °C)
Resolution
± 0.25" (6.5 mm)
Electrical Protection
NEMA 4/IP65 or NEMA 4X/IP66
    Simple Reliable Design
    All Stainless Steel Wetted Materials Available
    Maximum Stem Lengths to 8 Feet
    Resistive or 4-20 mA, 2-Wire Analog Signal Output
    Operating Conditions up to 800 PSIG and 250 °F
View Full Product Info
NML-308
Liquid Level Transducer

Max Length of 48" | up to 25 PSIG | up to 250 °F | All-Plastic Wetted Parts | Undisturbed by Foaming and Vapor | Liquid Interface Detection

Starting at $1,306
NML-308 Liquid Level Transducer
Measuring Length
6"...48"
Resolution
± 0.25 in.
Fittings
1...1/4" or 1...1/2" NPT
Fitting Material
PE, PP, PVC or PTFE
Max. Operating Temperature
140...250 °F (120 °C) (Material Dependent)
Max. Pressure
25 PSIG
Protection
NEMA 4X/IP65
Input Voltage
12–32 VDC
Output
4–20mA 2-wire, 0–5 VDC 3-wire, 0–10 VDC 3-wire
    All Plastic Wetted Parts
    All PTFE Wetted Parts Available
    Excellent for Use with Aggressive Chemicals
    Continuous Level Measurement
    Analog Output via Remote Mount Transmitter
    Compact Design
    Undisturbed by Foaming
    Vapor Insensitive
    Liquid Interface Detection
View Full Product Info
NML-310
Liquid Level Transducer

Max Length of 108" | up to 40 PSIG | up to 250 °F | PE, PP, PVC, or PTFE | All-Plastic Wetted Parts | Undisturbed by Foaming and Vapors

Starting at $1,540
NML-310 Liquid Level Transducer
Measuring Length
12...108"
Resolution
± 0.4"
Fittings
2" NPT Male or 2", 2.5", 3", 4" ANSI Flange
Fitting Material
PE, PP, PVC or PTFE
Max. Operating Temperature
140...250 °F (120 °C) (Material Dependent)
Max. Pressure
40 PSIG
Protection
NEMA 4X/IP65
Input Voltage
12–32 VDC
Output
4–20mA 2-wire, 0–5 VDC 3-wire, 0–10 VDC 3-wire
    All Plastic Wetted Parts
    All PTFE Wetted Parts Available
    Excellent for Use with Aggressive Chemicals
    Continuous Level Measurement
    Analog Output via Head-Mounted Transmitter
    Compact Design
    Undisturbed by Foaming
    Vapor Insensitive
View Full Product Info
NMT
Magnetostrictive Level Meter

Max Length of 157" | up to 145 PSIG | up to 158 °F | Stainless Steel | 2" NPT | 4-20 mA | Resistant to Machine Vibration

Starting at $1,733
NMT - Magnetostrictive Level Meter
Measuring Length
12...157 Inches
Fittings
2" NPT or G2
Wetted Material
Stainless Steel
Max. Pressure
145 PSIG
Media Temp. Range
-4...158 °F (70 °C)
Accuracy
± 0.04" (± 1 mm)
Output
4-20 mA
    High Accuracy
    Stainless Steel Wetted Materials
    4-20 mA Analog Output
    Long Service Life
    Resistant to Machine Vibration
    Sample Applications: Chemical Industry, Pharmaceuticals, Tank Farms, Power Stations, and General Process Industries
View Full Product Info
NRF
Capacitance Level Transmitter

Rigid Probe up to 20' and Flexible Probe up to 200' | up to 500 PSIG | up to 350 °F | NPT or Tri-Clamp Connections | Resistant to Machine Vibration

Starting at $1,420
NRF - Capacitance Level Transmitter
Fittings
3/4" NPT, 1-1/2" or 2" Tri-Clamp®
Accuracy
± 1% of Span
Repeatability
± 0.1% of Span
Output
4-20 mA
Max. Pressure
500 PSIG
Media Temperature Range
-100...350 °F (175 °C)
Rigid Probe
Up To 20 Feet
Flexible Probe
Up To 200 Feet
Fittings
316 Stainless Steel or PTFE
Probe
Fully PFA Clad or 316 SS
    Rigid and Cable Suspended Designs
    Compact Microprocessor Based Designs
    High Accuracy
    NPT Threaded and Tri-Clamp® Mountings
    Resistant to Machine Vibration
    Sample Applications: Waste Treatment Plants, Refineries, Food and Beverage Industry, Fire Protection Systems, Water Storage Tanks, and Chemical Holding Tanks
View Full Product Info
NRF-1F
Capacitance Level Probe

up to 10' | up to 100 PSIG | up to 350 °F | 316 SS | 4-20 mA | Water-Based Liquids, Fuel, and Solvents

Starting at $1,380
NRF-1F - Capacitance Level Probe for Low-Dielectric Liquids
Fittings
¾", 1½" NPT
Accuracy
± 1% of Span
Repeatability
± 0.1% of Span
Output
4-20 mA
Max. Pressure
100 PSIG @ 77°F / 50 PSIG @ 212°F / 14.5 PSIG @ 350°F
Media Temperature Range
-100...350 °F (175 °C)
Maximum Length
10 Feet
Fittings
316 Stainless Steel
Probe
Fully PFA Clad or 316 SS w/PTFE Spacers
    Heavy Duty Industrial Design
    Measurement of Fuels and Solvents with Bare SS Probe
    Measurement of Water Based Liquids with PTFE-clad Probe
    Compact Microprocessor Based Design
View Full Product Info
NRF-1W
Flexible Cable Water Well Level Transmitter

Cable Lengths up to 1,000 feet | up to 350 °F | 3/4" NPT | PFA-Clad SS Cable | High Frequency Propagation Resists Errors Due to Coating

Starting at $1,498
NRF-1W - Flexible Cable Water Well Level Transmitter
Accuracy
± 1% of Span
Repeatability
± 0.1% of Span
Max. Length
1000 Feet (300m)
Standard Fitting
3/4” NPT (316 SS)
Cable
PFA-clad 3/32" Diameter SS Cable
Weight
316 SS
Process Temp. Range
-100...350 °F (175 °C)
Ambient Temp. Range
-40...160 °F (70 °C)
Max. Pressure (SS Fitting)
100 PSIG @ 70 °F, 50 PSIG @ 300 °F, 14 PSIG @ 350 °F
    Flexible Cable Lengths Up to 1000 Feet (300m)
    Accuracy of ± 1% of Span
    High Frequency Propagation Resists Errors Due to Coating
    PFA-clad SS Cable
    Flexible, Segmented ½" Diameter Stainless Steel Cable Weight
    Simple, Non-Interacting Zero and Span Adjustment
    Sample Applications: Deep Well Measurement, Water Storage Tanks, Wastewater Treatment, and Chemical Holding Tanks
View Full Product Info
NRF-2 - NRF-3
Capacitance Level and Temperature Transducer

Measures Level and Temperature with One Device | up to 12 feet | up to 500 PSIG | up to 392 °F | NPT or Tri-Clamp |

Starting at $1,436
NRF-2, NRF-3 - Capacitance Level and Temperature Transducer
Fittings
3/4" NPT, 1-1/2"...3" Tri-Clamp®
Level Accuracy
± 1% of Span
Level Repeatability
± 0.1% of Span
Output
4-20mA Outputs for Level and Temperature or 4-20mA for Level and Pt-100 for Temperature
Max. Pressure
500 PSIG
Media Temperature Range
-58...392 °F (200 °C)
Maximum Length
12 Feet
Wetted Materials
316 Stainless Steel, PTFE, PFA
Probe
Fully PFA-clad or 316 SS
    Measures Both Level and Temperature with One Device
    Compact Microprocessor Based Designs
    High Accuracy
    NPT Threaded and Tri-Clamp® Mountings
    Heavy Duty Industrial Design
    Sample Applications: Waste Treatment Plants, Refineries, Food and Beverage Industry, Fire Protection Systems, Water Storage Tanks, and Chemical Holding Tanks
View Full Product Info
NTB
Deep Well Level Probe

up to 200 mWC | up to 140 °F | SS, Polyurethane, FPM | Debris Resistant

Starting at $666
NTB - Deep-Well Level Probe
Measuring Range
0...1 to 0...200 mWC
Wetted Materials
SS, Polyurethane, FPM
Max. Pressure
3x Max. Range
Max. Temperature
140 °F (60 °C)
Max. Cable Length
300 m
Ingress Protection
IP68
Linearity
± 0.25%
    0-1 to 0-200 Meter Water Column Measuring Range
    Compact & Reliable
    Debris Resistant
View Full Product Info
NUS-4
Ultrasonic Level Transmitter

Level Measurement or Open Channel Flow Measurement | Polypropylene or PVDF Models | High Accuracy | Narrow Beam Angle | 4-20 mA Standard | Up to 80 feet, 40 PSI, 194 °F

Starting at $1,367
NUS-4 - Ultrasonic Level Transmitter
Measuring Range
Liquids up to 80 feet
Fittings
1-1/2", 2" NPT, 3",5",6" ANSI Flange
Max. Pressure
40 PSIG
Max. Temperature
194 °F (90 °C)
Power Supply
12...36 VDC
    Measuring Range of Liquids up to 25 m Solids up to 10 m
    Narrow 5-7° Beam Angle
    Polypropylene or PVDF Wetted Parts
    Accuracy of ± 0,2 % of Reading, + 0,05 % of F.S.
    4-20 mA 2-Wire Output Std, Relays/Display Optional
View Full Product Info
NUS-7
Compact Ultrasonic Level Transmitter

Excel in Multiple Tank Applications | Programmable Features | Relay Functions | Measurement Configuration and Optimization | Information/Diagnostics | Up to 20 feet, 40 PSI, and 194 °F

Starting at $1,142
NUS-7 - Ultrasonic Level Transmitter for Liquids
Measuring Range
Liquids up to 20 Feet
Accuracy
± 0.2% of Reading + 0.05% of Full Scale
Wetted Material
PP or PVDF
Maximum Pressure
40 PSIG
Maximum Temperature
194 °F (90 °C)
Fittings
2" NPT, G 2
Outputs
4-20 mA HART®, Relay
    Programmable Features
    Relay Functions (Differential, Flow Pulse, etc.)
    Measurement Configuration (Units, Function, Close-end Blocking)
    Measurement Optimization (Damping, Tracking Speed, Sound Velocity Correction, etc.)
    32 Point Linearization, Measurement Simulation
    Information/Diagnostics (Echo Map and Signal/Noise)
View Full Product Info
NZJ
Micro Bypass Level Indicator

4" to 22" Installation Length | up to 230 PSIG | up to 210 °F | up to 50 cSt | 1/4" NPT | Limit Contacts Available

Starting at $178
NZJ - Micro Bypass Level Indicator
Installation Length
4"...22"
Maximum Pressure
230 PSIG
Maximum Temperature
210°F (100 °C)
Maximum Viscosity
50 cSt
Wetted Materials
Stainless Steel (304/316) / Aluminum, NBR, FKM, EPDM, or PTFE Seals
    Local Indication without Auxiliary Power
    Connections - 1/4" NPT, G¼ (Male) Union Nut
    Limit Contacts Available
View Full Product Info

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