RESISTIVE TANK LEVEL SENSORS

Low-Power RS485 Modbus Tank Level Gauging Solution

RL3 | RL4

 

HIGHLIGHTS

  • Monitor product, interface & temperature using a single Resistive Level Sensor
  • 1/2” or 1/4” sensor option / flex or rigid
  • ± 1/8” accuracy on 1/4“ sensor / ± 1/4” accuracy on 1/2“ sensor
  • Modbus or LevelMaster interface
  • Self-contained, rugged design
  • Installs in minutes with Quick Connect that eliminates sensor wiring error and hassle
  • Class I, Division 1 (Zone 0)
  • Intrinsically Safe
  • IP66, -40 °C to 70 °C
  • 6-12 Vdc
  • Supports up to 16 sensors multi-dropped

Ultimate Level Sensing Solution

The OleumTech® H-Series Resistive Tank Level Sensors are the superlative hardwired tank level monitoring solution. This accurate level monitoring instrument has the ability to monitor product, interface, and temperature levels using a single OleumTech Resistive Tank Level Sensor. OleumTech’s patented Resistive Sensors are offered in both flexible (PTFE) and rigid (316 SS) materials in various custom lengths. The 1/4” resolution sensors mate with the HW5800-RL3 and HW5800-RL4 versions. The 1/2” resolution sensors mate with the HW5000-RL3 and HW5000-RL4 versions.

Reliable, Scalable, and Safe

The field-proven level sensor can communicate with any Modbus master or LevelMaster device via RS485 Serial connection. The low-power Resistive Level Sensor can be multi-dropped of up to 16 sensors. Additional data such as volume and tank full percentage can be calculated and reported as well, along with the core level variables. The Resistive Level Sensor is certified for use in Class I, Division 1 (Zone 0) hazardous locations.

This product is also available with wireless connectivity and a local display.

This product is also available with wireless connectivity.

TECHNICAL SPECIFICATIONS

CERTIFICATIONS & COMPLIANCE 
Safety∙ Intrinsically Safe for Use in Hazardous Environments
∙ Class I, Division 1, Groups C, D T4; Ex ia IIB T4 Ga; Class I, Zone 0, AEx ia IIB T4 Ga, -40 °C ≤ Tamb ≤ 70 °C
∙ ATEX: Sira 16ATEX2229X; Ex ia IIB T4 Ga, -40 °C ≤ Tamb ≤ 70 °C
∙ IECEx: SIR 16.0079X; Ex ia IIB T4 Ga, -40 °C ≤ Tamb ≤ 70 °C
HARDWARE FEATURES 
Device Functionality∙ Serial Resistive Level Sensor
RL3/RL3-T: Modbus, 3-in-1 Measurement Capability: Product, Interface and Temperature
RL4/RL4-T: LevelMaster ASCII, 3-in-1 Measurement Capability: Product, Interface and Temperature
Embedded Controller∙ Ultra-Low Power RISC Microcontroller with Internal FLASH (Field Upgradeable)
Configuration∙ USB to RS485 Converter (SX1000-CC8)
Sensor Type∙ Resistive
Resolution∙ High Resolution, Depends on Sensor: 1/4" (6.4 mm) or 1/2" (12.7 mm)
Accuracy∙ ±1/8-inch for 1/4-inch Resolution Sensor ; ±1/4-inch for 1/2-inch Resolution Sensor
∙ ±3.2 mm for 6.4 mm Resolution Sensor ; ±6.4 mm for 12.7 mm Resolution Sensor
Power Source∙ External 6-12 Vdc (12 Vdc Max)
Self-Diagnostics∙ Contains Comprehensive Self-Checking Software and Hardware for Continuous Monitoring of Operation
Communication∙ Modbus or LevelMaster ASCII
Baud Rate∙ 1200-115200 bps
MECHANICAL SPECIFICATIONS
Dimensions∙ 5" (W) x 7.6" (H) x 4.4" (D) / 127 mm (W) x 193 mm (H) x 112 mm (D)
Package Dimensions ∙ 10.25" (W) x 14" (H) x 6.5" (D) / 260 mm (W) x 356 mm (H) x 165 mm (D)
Package Weight∙ ~4.5 lbs/ 2.0 kg
Connection Fitting∙ 3/4" NPT Female
Enclosure Casing Material∙ Type 4X Aluminum; IP66
ELECTRICAL SPECIFICATIONS
DC Power Input∙ 6-12 Vdc (12 V Max)
Power Consumption∙ 5.4 mA Max @ 6-12 Vdc
IS Safety Protection∙ Barrier Board (SX1000-BB1)
SENSOR
RIGID: 316 Stainless Steel "SS"
FLEX: Polytetrafluoroethylene "PTFE"
Type
Extremely Reliable and Accurate Resistive Reed Switch Technology
Measurement Capabilities (3-in-1)
Product, Interface, and Temperature
Lengths Offered in US Units
2 to 26 ft Length in 1 ft Increments
8 to 38 ft Length in 1 ft Increments
Lengths Offered in Metric
0.61 to 7.93 m in 0.31 m increments
2.44 to 11.58 m in 0.31 m increments
Resolution and Accuracy
Option 1: 1/2-inch (12.7 mm) Resolution with ±1/4-inch ( ±6.4 mm) Accuracy (6-pin Quick Connect)
Option 2: 1/4-inch (6.4 mm) Resolution with ±1/8-inch (±3.2 mm) Accuracy (8-pin Quick Connect)
Sensor to Interface Mating Connection (No Wiring Solution)
316 SS Quick Connect: 6-pin Connection for 1/2" Resolution, 8-pin Connection for 1/4" Resolution
Tank Mating Connection (Adjustable Compression Fitting)
2-15 ft: 3/4" NPT Male / 16-26 ft: 1" NPT Male
1" NPT Male
Temperature Accuracy
±1 °C
Sensor Rod/Tubing Diameter
0.63" (16 mm): 2-15 ft Sensor
0.85" (22 mm)
0.85" (22 mm): 16-26 ft Sensor
0.85" (22 mm)
Anchor Weight Diameter
N/A
2.88" / 73 mm
Height of Anchor Weight
N/A
Up to 26 ft sensor: 4.75" / 121 mm
N/A
26 - 38 ft sensor: 8" / 203 mm
Coiled Diameter
N/A
20" (50.8 cm) Coiled Diameter
Minimum Measurement from Bottom (Deadband)
2" (50.8 mm) from Bottom
From Top of Anchor Weight
Sensor Pressure Rating
Float Dependent
Float Dependent
316 Stainless Steel - Standard (Included w/Rigid <=15 ft
440 PSI / 30 Bar
N/A
316 Stainless Steel - Large
363 PSI / 25 Bar
142 PSI / 9.8 Bar
Polypropylene (PP) (Inc. w/Flex and w/Rigid >=16ft
72 PSI / 5 Bar
72 PSI / 5 Bar
Float Options:
316 Stainless Steel - Standard, 440 PSI/30 Bar
Compatible Only with Rigid Sensor Length up to 15 ft Prod: 0.64 SG, Intf: 0.96 SG, ID 0.72" (18.3 mm)
OD 2.05" (52.1 mm), Inner Clearance: 0.1" (2.6 mm)
316 Stainless Steel - Large, 363 PSI/25 Bar
Product: 0.62 SG, Interface: 0.95 SG, ID 1.1" (27.9 mm), OD 2.76" (70.1 mm), Inner Clearance: 0.5" (12.7 mm)
Polypropylene (PP), 72 PSI/5 Bar
Product: 0.64 SG, Interface: 0.96 SG, ID 1.1" (27.9 mm), OD 2.91" (73.9 mm), Inner Clearance: 0.5" (12.7 mm)
Operating Temp. Sensing Area
-40 °F to 248 °F (-40 °C to 120 °C)
Certifications
Class I, Division 1, Groups C, D T4; Ex ia IIB T4 Ga; Class I, Zone 0, AEx ia IIB T4 Ga, -40 °C ≤ Tamb ≤ 70 °C
ATEX: Sira 16ATEX2229X; Ex ia IIB T4 Ga, -40 °C ≤ Tamb ≤ 70 °C
IECEx: SIR 16.0079X; Ex ia IIB T4 Ga, -40 °C ≤ Tamb ≤ 70 °C
Power (Wireless)
3.6 V Lithium Replaceable Battery Pack, 10-Year Life @ 1 min Read Interval
Power (Hardwired)
External 6-12 Vdc (12 V max), 5.4 mA @ 6-12 Vdc
Wireless Compatibility
OTC - WT / SM Series Resistive Transmitters and Sigfox-enabled Resistive Nodes
Hardwire Serial Interface (H-Series Only)
RS485, 2-Wire, 16 or 32-bit Modbus RTU, LevelMaster ASCII, Termination for Daisy-chain
Minimum Sensor Read Interval
Down to 5 Seconds
Model #: 1/2" Resolution with ±1/4-inch Accuracy
60-4001-xxx
60-4101-xxx
Model #:1/4" Resolution with ±1/8-inch Accuracy
60-4101-xxx
60-4102-xxx
Kit #: 1/2" Resolution with Float(s)
ZG-xxx-Fxx
TG-xxx-Fxx
Kit #: 1/4" Resolution with Float(s)
ZH-xxx-Fxx
TH-xxx-Fxx
GENERAL SPECIFICATIONS 
Operating Conditions∙ Ambient Temperature (Class I, Division 1): -40 °F to 158 °F (-40 °C to 70 °C)
∙ Ambient Temperature (Non-Hazardous Applications): -40 °F to 176 °F (-40 °C to 80 °C)
∙ Humidity: 0 to 99 %, Non-Condensing
Warranty∙ 2-Year Parts and Labor
Country of Origin∙ USA
ORDERING INFORMATION 
Model Numbers∙ 1/2" Resolution (6-pin): HW5000-RL3 (Modbus), HW5000-RL4 (LevelMaster ASCII)
∙ 1/4" Resolution (8-pin): HW5000-RL3-T (Modbus), HW5000-RL4-T (LevelMaster ASCII)
Barrier Boards∙ SX1000-BB1
Configuration Kit∙ H-Series Configuration Kit (SX1000-CC8)