Varec NMS81 Proservo Tank Gauge

The NMS81 Proservo Tank Gauge (STG) is an intelligent tank gauge for high accuracy liquid level measurement and is suited for both custody transfer and inventory management applications employing the latest microprocessor technology.

Specifications

Accuracy

+/-0.4 mm for (+/- 0.016 in)
(Under reference condition, according to OIML R85)

 

 

Net Weight

30kg (66.1 lb)

Enclosure Materials Electrical compartment: aluminum Drum chamber: 316/316L Rated IP66/68, NEMA Type 4x/6P enclosure

Pressure Rating

Suitable for atmospheric and high pressure applications up to 25 bar/2.5 MPa/362 psi

 

Cable Entry

NPT, Metric, BSP (G) class threads

Power Requirements

High voltage type: 85 to 264 VAC, 50/ 60 Hz, 28.8 VA

Low voltage type: In preparation

 

Operating (Liquid) Temperature

-200 to +200°C (-328 to 392°F)

Ambient Temperature Device: -40 to +60°C (-40 to +140°F) Display Module: -20 to +70°C (-4 to +158°F)

 

Approvals

FM, ATEX, IEC Ex, or NEPSI

Display (LCD)

Four line, white background lighting, switches to red for device errors

Language selection: English, German, Japanese

 

Programming

Local display; operation via the local display is possible without opening the

device

Configuration software (e.g. DeviceCare); connected via:

HART Service port (CDI) with optional Commubox FXA291

 

Standard Range

28m with 316L measuring wire

Level Accuracy

+/-0.4 mm for (+/- 0.015 in)

(Under reference condition, according to OIML R85)

 

Interface Level

+/-2 mm (+/-0.08) (Difference of product densities 0.100 g/cm3 (6.25lb/ft3))

Spot & Profile Density

+/-0.003 g/cm³ (Under reference condition, according to OIML R85)

 

Medium Density

0.430 to 2.000 g/cm³ (27 to 125 lb/ft3)

Medium Density Difference

0.1 g/cm³ (6.24 lb/ft3)

Viscosity

0 to 5 000 mPs

Options

Flange Type

ASME or DIN. Refer to order code for full selection.

Wire Material and Optional Ranges 16 m (53.33 ft): PFA > 316L; 0.4 mm (0.016 in) 22 m (73.33 ft): AlloyC276; 0.2 mm (0.008 in) 28 m (93.33 ft), 36 m (120 ft), and 47 m (154.2 ft): 316L; 0.15 mm (0.006 in)

Wire Protection PTFE coated Steel PFTE coated Steel 316L AlloyC276

 

Displacer Material

Stainless steel 316L, AlloyC, or PTFE

Displacer Diameter 30…50mm (dependent on application) Optional 70…110mm

 

Primary Outputs Modbus RS485 V1 4-20mA HART Ex d/XP, RTD input + 4-20mA HART Ex i/IS, RTD input

Secondary I/O Analog 1 x “Ex d/XP 4-20mA HART + RTD input” 2 x “Ex d/XP 4-20mA HART + RTD input”

Proservo Tank Gauge