STS ATM.1ST/N High-Precision Submersible Level Transmitter
High precision submersible level probe family; nominal 0.5–250 mH₂O range and configurable accuracy to 0.25% FS per STS overview. Standard ATM.1ST/N is not universally IECEx-certified; hazardous-area variants are specifically /Ex.
Technical documentation
Official STS ATM.1ST/N technical catalog.
Hazardous-area verification: ATEX, IECEx, FM and EAC approvals are not interchangeable. Confirm actual order-code suffix and manufacturer certificate schedule before installation.
ATM.1ST/N — high-precision hydrostatic level
Accuracy budget: Manufacturer-listed precision up to 0.25% full scale is not 0.25% of the reading. Choose a pressure span that accommodates maximum head while maintaining enough resolution at minimum operating depth, and incorporate temperature and fluid-density uncertainty when converting mH₂O into level.
Installation: Check cable/connector protection, sensor tip position, the required gauge/absolute reference and material compatibility with the monitored liquid. Cable length and venting can be as important as the pressure sensing element in open wells and tanks.
Variant boundary: A pictured standard ATM.1ST/N must not be treated as ATM.1ST/N/Ex. Only the supplied order suffix and its certificate schedule establish hazardous-area approval.