The FLD-xRTD is a variable resistance output, self-powered Monitoring Module for remote monitoring up to 4 individual, sensor cables. Waterproof enclosure, battery powered, stand-alone, hazardous location device designed for long term deployment. Agnostic communication output via PT100 emulation. The monitoring module is engineered for outdoor installation in challenging environmental conditions. Its measurement frontend is designed for interfacing with reusable, fully passive hydrocarbon sensor cables and sensing probes manufactured by Naftosense.
The multiplexed architecture of the monitoring module allows up to 4 individual sensor sections not exceeding 82 ft (25 m) per FLD-xRTD.
Advanced measurement techniques and data treatment algorithms are used to provide intelligent thresholding for eliminating the nuisance alarm due to the presence of motor/lube oils, greases, residues of old leaks, etc.
The monitoring module is self-powered by internal non-replaceable Lithium Thionyl battery. The expected operational life of FLD- xRTD is more than 12 years even at arctic temperatures.
FLD-xRTD is approved for installation in classified locations according to FM, Atex, IECEx and other North American approvals. Designed only to be used with all Naftosense sensors and 3rd party hard wired or wireless resistance transmitters.
Features and Benefits
- Detects reliably viscous hydrocarbons at very low temperatures
- True multi-leak capability
- Real-time transmission of sensor contamination Intelligent thresholding with adjustable sensitivity to avoid nuisance alarms from base line contamination
- Emulates industry standard Pt100 RTD for direct interfacing with existing monitoring infrastructure or wireless transmitters
- Very wide operating temperatures range
- Able to detect the vapors diffused in the soil after spill from underground pipes
- 10-year warranty
Typical Applications
- Leak detection in Oil & Gas facilities
- Detection of leaking fuel from airport hydrant systems, military, custody transfer generators and plumbing in demanding environments installations in harsh outdoor, demanding environmental conditions
- Leak detection in refineries, tank farms, mainline pipe sections, or repair sites
- Oil-on-water leak detection in sumps, retention ponds, saturated soil areas, etc.
- Monitoring of oil wells
- Leak detection in downstream and fuel retail facilities
Communication Made Easy
Utilize your existing network when integrating a Naftosense leak detecting system. Compatible with any wireless and wired system via a host of standard communication protocols:
- PT100 (RTD)
Agency Approvals
- In the US: Intrinsically safe - Class I, Division 1, Groups A, B, C and D, Class I, Zone 0, AEx ia IIC
- Atex: Intrinsically safe – II 1 G, Ex ia IIC Gb T4
- IECEx: Intrinsically safe – Ex ia IIC Gb T4
- Tested by FM Approvals for compliance as per FM Class 3610
TECHNICAL INFORMATION
| Typical Detection Time at 68°F (20°C) with FLD-HSC Sensor Cable | |
| Unleaded Gasoline | 1 minute 30 seconds |
| Diesel/Jet Fuel | 2 to 3 minutes |
| Light Crude Oils | 6 to 8 minutes |
| Heavy Crude Oils | 12 to 16 minutes |
| Motor/Hydraulic/Silicone Oils | 12 to 25 minutes |
Nominal resistance values on OUT1 and OUT2
| OUT1 – Status and Relative Contamination | OUT2* - Status or Section Identification |
| Normal status: 100 Ohms | Normal status: 100 Ohms |
| Sensor String Break: 60 Ohms | Sensor String Break: 60 Ohms |
| Hardware failure/Low battery: 75 Ohms | Hardware failure/Low battery: 75 Ohms |
| Leak alarm w/level: 151 – 300 Ohms (32 steps) | Number of sensor section in leak alarm: sensing cable number (depending on 1, 3, or 8 channel monitoring modules used) |
| Battery too low, device off: > 1 kOhms | Battery too low, device off: > 1 kOhms |
* On request, OUT2 may be used for coding other parameters. Please contact Naftosense for details.
| Technical Data | |
| Dimensions | 2.52" x 2.283" x 1.378" (64 x 58 x 35 mm) |
| Weight | 0.5 lb. (225 g) |
| Fire Rating | UL94-HB |
| Ingress Rating | IP67/NEMA4X - suitable for outdoor/direct burial |
| Operating Temperature Range | F4 Model: -40°F to 140°F (-40°C to 60°C) T3 Model: -40°F to 176°F (-40°C to 80°C) |
| Supply Voltage | 3.6 VDC |
| Operating Life | 10 years minimum |
| Mounting | Wall-mounted with external mounting brackets |
| Hazardous Locations Classification Model FLD-F4RTD | IS/ I/ 1/ CD/ T4 ; I/ 0/ AEx/ ia IIB T4 ; Class I, Zone 0, Ex ia T4 Class I, Div. 1, Groups C,D; T4 II 1 G Ex ia IIB T4 Ga |
| Hazardous Locations Classification Model FLD-T3RTD | IS/ I/ 1/ CD/ T3 ; I/ 0/ AEx/ ia IIB T3 ; Class I, Zone 0, Ex ia T3 Class I, Div. 1, Groups C,D; T3 II 1 G Ex ia IIB T3 Ga |
| Warranty | 10 years |
Warning! This is an agency-approved product. It shall be installed according to the corresponding classified location certificates. Any deviation from the conditions of use defined in the Control Drawing is strictly prohibited. The device contains encapsulated non-replaceable lithium battery. Please dispose it as required by the relevant local regulations.
| Product Codes | |
| FLD-F4RTD-1 | Single-channel Field box with 1 x Pt100-RTD-compatible output and an additional Digital Output. Hazardous area - T4 rated, ambient temperature up to +60°C |
| FLD-F4RTD-4 | Four-channel Field box with 2 x Pt100-RTD-compatible outputs. Hazardous area - T4 rated, ambient temperature up to +60°C |
| FLD-T3RTD-1 | Single-channel Field box with 1 x Pt100-RTD-compatible output. Hazardous area - T3 rated, ambient temperature up to +80°C |
| FLD-T3RTD-4 | Four-channel Field box with 2 x Pt100-RTD-compatible output. Hazardous area - T3 rated, ambient temperature up to +80°C |