NG # 02631-HW-KELLER-007
The Keller Microlevel is a high-accuracy, microbore submersible level transmitter designed specifically for small-diameter environments. With an outer housing diameter of just 0.63 inches ($16\text{ mm}$), it is engineered for down-hole monitoring, small piezometer tubes, driven wells, and restricted conduit installations where standard 1-inch transmitters cannot fit.
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Stock
Custom Pricing
Get A QuoteThe Microlevel combines piezoresistive silicon sensing technology with microprocessor-based signal conditioning. It incorporates dual-output architecture (analog $4\text{--}20\text{ mA}$ and digital RS485 Modbus RTU), allowing real-time level monitoring while giving operators the flexibility to rescale analog outputs or retrieve temperature data digitally.
| Specification Category | Parameter | Specification Detail |
| Measurement & Range | Available Pressure Ranges | Custom ranges from $0\text{--}3\text{ ftWC}$ up to $0\text{--}900\text{ ftWC}$ ($0\text{ to }390\text{ PSI}$) |
| Static Accuracy | $\pm 0.1\%\text{ FS}$ standard ($25^\circ\text{C}$) | |
| Total Error Band (TEB) | $\pm 0.25\%\text{ FS TEB}$ across compensated temperature range | |
| Compensated Temp Range | $0\text{--}80^\circ\text{C}$ ($32\text{--}176^\circ\text{F}$) | |
| Electrical & Signal | Analog Output | $4\text{--}20\text{ mA}$ (2-wire current loop) |
| Digital Output | RS485 (Modbus RTU protocol, temperature + pressure output) | |
| Power Supply | $10\text{--}30\text{ VDC}$ ($15\text{ VDC}$ minimum recommended for long cable runs) | |
| Physical Construction | Housing Diameter | $0.63\text{''}$ ($16\text{ mm}$) |
| Wetted Body Materials | 316L Stainless Steel or optional Titanium for brackish/corrosive fluids | |
| Cable Options | Vented Polyethylene (PE) or Hytrel jacketed with Kevlar strength member | |
| Environmental Rating | IP68 / NEMA 6P (Hermetically sealed submersible unit) | |
| Approvals & Features | Certifications | NSF/ANSI 61 & NSF/ANSI 372 |
| Surge Protection | Integrated internal surge and lightning suppression |
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