Overview
The BM26A-8000 is a magnetic level indicator (MLI) for redundant level measurement in liquid applications. It comes in two versions: BM26A-8000-TWIN and BM26A-8000-BI. The BM26A-8000-TWIN consists of a double measuring chamber with one chamber featuring a flapper indication and the other one – equipped with a level transmitter (TDR guided radar, FMCW radar or displacer) – acting as a bypass chamber. The BM26A-8000-BI features a unique measuring chamber with two compartments, one for the OPTIFLEX 7200 transmitter probe and one for the float moving next to it.
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.
- Combined technology for redundancy
- Can be fitted with OPTIFLEX 7200 or OPTIFLEX 8200 guided radar (TDR), OPTIWAVE 7400 radar (FMCW) or BW 25 displacer level transmitter
- Also available as TWIN version with a dual bypass chamber connected adjacently
- Rugged metallic design – no maintenance
- Large choice of materials e.g. 316L, 304L, alloy C276, alloy 625
- Highly visible flaps housed in hermetically sealed glass tube (IP68)
- Accuracy from ±2 mm / ±0.08″ with OPTIFLEX and OPTIWAVE level transmitters
Specifications
Depending on selected device configuration
General information
| Product type | Level indicator |
| Product family name | BM |
| Product positioning | For liquids in redundant measurement |
| Measurement principle | Radar (FMCW), Displacer, Guided radar (TDR), Float |
| Level measurement type | Continuous measurement |
| Contact to measured medium | Yes |
| Interface measurement | Yes |
| Redundancy | Yes |
| Measured media | Liquids |
| Measuring range (liquids) |
0.3…5.5 m/ 1...18 ft (other on request) |
| Measuring point | Bypass |
Operating conditions
| Process temperature |
Version with OPTIFLEX 7200:
Version with OPTIFLEX 8200:
Version with OPTIWAVE 7400:
Version with BW 25: |
Materials
| Gaskets | Depending on selected device configuration |
| Wetted parts | Depending on selected device configuration |
Process connections
| Flange connections |
EN (1092-1): DN15…50 ASME (B 16.5): ½...2″ |
Approvals/Standards
| Certificates/Approvals Ex | ATEX, IECEx |
| Certificates/Approvals Safety | SIL 2/3 |
Communication
| Analogue outputs | 4…20 mA |
| Discrete outputs | Limit switches |
| Digital outputs | FOUNDATION™ fieldbus, HART®, Profibus-PA |
Accuracy
| Accuracy (liquids) |
Indicator: ±10 mm/0.39 in OPTIFLEX/OPTIWAVE: ±2 mm /0.08 in |
US 6618 
BR 4082 
VN 3309 
AU 1453 
TH 1399 
JP 1309 
SG 894 
CA 748 
