Hazardous Area Direct Extractive Filter Probes for NEC Division 2
Baldwin’s Direct Extractive Filter Probes feature an advanced design to extract sample gas and remove particulate while preventing condensation prior to the gas sample entering the heated sample line.
New Machine-Lathed Sure-Lock™ Filter Assembly
Baldwin’s new Sure-Lock filter assembly is precision machined and features a unique design to help ensure proper insertion into the assembly and to reduce the possibility of leaks. The filter head is inserted into a notch in the assembly to ensure proper alignment before locking it in place. The o-rings are tightened under compression, rather than being located on the sides of the filter head, to reduce the risk of leakage.
- Available for Class 1 Division 2 applications
- Sure-lock filter reduces risk of leakage
- Range of filter elements designed for various applications
- Available with air blowback system
Options Available:
- Schedule 40, Schedule 80, Hastelloy, and Durinert+ stinger probes
- Sintered stainless steel, screen mesh, ceramic, glass fiber, and Hastelloy filter elements
- Air blowback system with 115 VAC, 230 VAC, 12 VDC, or 24 VDC solenoid
- Solenoid to close sample line when blowback is initiated
- Gas cooling spool piece for high temperature gas sources
- Various size flanges
- Durinert™ or Teflon coated filter assembly option for corrosive gas streams
- NEMA 4X stainless steel or fiberglass enclosure
Model Specifications
| Model | Area Classification | Blowback | Filter Assembly Temp Control |
Enclosure | Dimensions* HWD |
Weight |
| 34 C-Z | Class 1, Div 2 Groups B, C, D | 2-way Solenoid | External regulated | NEMA 4 Steel | 14x20x8 in – 36x51x20 cm | 40 lbs 18 kg |
| 34 C-R-Z |
Class 1, Div 2 Groups B, C, D | 2-way Solenoid | Self regulated | NEMA 4 Steel | 14x20x8 in – 36x51x20 cm | 40 lbs 18 kg |
| 33 XP (Discontinued) |
Class 1, Div 1 Groups B,C,D |
N/A | Self or External regulated | UL™ Classified Aluminum | 8x8x11 in 20x20x28 cm |
30 lbs 14 kg |
*Excluded probe stinger and heat-shrink boot.
Extractive Probe Intelligent Product Numbering System
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Product Specifications
| Filter Assembly | Sure-Lock, 316 stainless steel |
| Filter Element Types | 10 micron sintered SS (standard) 5, 20 micron sintered SS 2 micron ceramic 2 micron SS screen mesh 0.1 micron glass 0.7 micron glass / TFE coated 2 micron Teflon |
| Probe Lengths | 18 inch, 1, 2, 3, 4, 5 foot |
| Probe Materials | Schedule 40, Schedule 40 Hastelloy (optional) |
| Connections | 1 1/4″ male pipe nipple mount; 1/2″ female pipe thread for stinger |
| Connectors | 1/4″ cal gas, 3/8″ blowback, 3/8″ sample line |
| Thermocouple | Type K |
| Heater Type | Silicone rubber blanket w/metal snap closures, 100W (standard) Heater bands, 350W (optional upgrade) |
| Heat-shrink Boot* | 7″ length, 2.75″ min expanded I.D. nose |
| O-rings | Viton™ |
| Gaskets | Graphoil |
| Enclosure Insulation | 1/8″ thick silicone, medium density |
| Calibration Gas Requirement | 20 psig, 6-10 LPM |
| Probe Operating Temperature | 375°F (190°C) |
| Input Voltage | 115 (230 optional) VAC, 50/60 Hz |
*Class 1, Division 2 probes require air purge line
Blowback System Specifications (Models 34C-Z, 34C-R-Z, 34XP)
| Blowback Duration | 5 sec standard |
| Instrument Air for Blowback | Min50 psig, Max 90 psig |
| Blowback Accumulator Tank | 16 ga. SS, 4×8 inch cylinder |
| Blowback Flowrate | 14 scfh |
| Blowback Valve | 120 VAC (standard) 230 VAC, 12VDC, 24 VDC (optional) |
Baldwin™ is a Trademark of Perma Pure LLC
Viton™ is a Registered Trademark of DuPont
Graphoil™ is a Registered Trademark of Union Carbide Corporation
