Mercoid Submersible Level Transmitters
Piezoresistive submersible transmitters for wastewater, ground water, wells, boreholes, and sewage lift stations. Lightning protected and intrinsically safe options available.
Wastewater / Slurries
Series PBLT2 & PBLTX
Perfect for Sludge and Slurries
- Large diameter non-clogging 316 SS diaphragm seal
- Lightning & surge protection (PBLT2)
- UL intrinsically safe option (PBLTX)
- ±0.25% accuracy, 4–20 mA output
- ETFE or polyurethane cable
Ground Water / Wells
Series SBLT2 & SBLTX
Perfect for Ground Water and Wells
- Slim bullet nose design protects diaphragm
- Lightning & surge protection (SBLT2)
- UL intrinsically safe option (SBLTX)
- ±0.25% accuracy, 4–20 mA output
- Cable up to 333 ft (polyurethane)
Wells / Boreholes
Series MBLT
Miniature — Only 0.63″ Diameter
- Only 0.63″ diameter for wells and boreholes
- Up to ±0.10% accuracy
- 8V low power voltage models available
- Lightning protection standard
- CE approved
Sewage / Lift Stations
Series FBLT
Flush Tip — Non-Clogging Design
- Flush diaphragm tip — will not clog
- PTFE-coated FKM fluoroelastomer diaphragm
- Fits stilling wells and narrow installations
- Optional NPT connection for rigid mount
- Lightning protection standard
Series Comparison
| Feature | PBLT2 / PBLTX | SBLT2 / SBLTX | MBLT | FBLT |
|---|---|---|---|---|
| Best Application | Wastewater, slurries | Ground water, wells | Wells, boreholes | Sewage, lift stations |
| Accuracy | ±0.25% FS | ±0.25% FS | ±0.10% or ±0.25% FS | ±0.25% FS |
| Diameter | Standard | Slim | 0.63″ miniature | Narrow |
| Diaphragm | Large 316 SS | Bullet nose 316 SS | 316 SS nose cap | Flush PTFE-coated FKM |
| Lightning Protection | Yes (PBLT2) | Yes (SBLT2) | Yes (standard) | Yes (standard) |
| Intrinsically Safe | PBLTX model | SBLTX model | No | No |
| Output | 4–20 mA | 4–20 mA | 4–20 mA or 0–5V | 4–20 mA |
| Power | 13–30 VDC | 13–30 VDC | 8–33 VDC | 10–33 VDC |
| Agency Approvals | PBLTX: CE, cULus | SBLTX: CE, cULus | CE | CE |
Common Specifications (All Series)
Sensing Technology
Piezoresistive sensing element
Housing Material
316 SS
Output Signal
4 to 20 mA DC, 2-wire (standard)
Pressure Limit
2× full scale
Response Time
< 50 ms
Cable
Shielded and vented; polyurethane or ETFE
Vent
Maintenance-free filter; automatic atmospheric pressure compensation
Mounting
Suspended in tank/well below level being measured
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