Ultra 4 Pulsar Non-contacting Ultrasonic Level Control and Flow Measurement

Ultra 4 offers the sophistication and advanced features of the rest of the Ultra range in a compact, cost-effective package and useful new features that make it even easier to set up and fine-tune. Offering as the name suggests, four-alarm or control relays (3 X SPCO isolated and 1 x SPNO solid-state) and a multi-functional display while losing none of the easy setup and configuration that has made the Ultra range the natural choice for non-contacting measurement worldwide.

Like the rest of Pulsar's 'transducer plus controller' ranges, Ultra 4 is compatible with both dB ultrasonic and dBR radar transducers. Ultra 4 can be either wall or fascia mounted and includes HART, Profibus, and Modbus digital communications options and the convenience of an onboard micro SD card slot for extended data logging. Like the rest of the Ultra range, Ultra 4 also offers built-in volume calculations based on standard tank shapes as well as advanced pump control and open channel flow measurement functions.

Specifications :

Physical :

Mounting option:

Standard Wall Mount:

Fascia Mount:

Controller body dimensions:

150 x 130 x 63.5mm

(5.9 x 5.1 x 2.5”)

160 x 180 x 63mm

(6.3 x 7.07 x 2.5”)


Nominal 700g

Nominal 700g

Enclosure Material/Description:

10 cable entries. 1 x M16, 5 x M20 underside, 4 x PG11 at rear

Polycarbonate, flame resistant to UL94-V0

Cable Entry Detail:

3 x M20 glands


Transducer Cable Extensions:

3-core Screened


Maximum Separation:

1000m, 500m for dBR16 and dBR8


Environmental :

IP Rating:



Max. and Min. Temperature (electronics):

-20 ºC to +45 ºC (-4 ºF to +113 ºF)


Flammable atmosphere approval:

Safe area: compatible with approved dB transducers


UV Rating:

UL746C F1


CE Approval:

See EU Declaration of Conformity


UL Approval:

UL61010-1 pending


Performance :


 0.25% of the measured range or 6mm (whichever is greater)
 +/- 2mm for  dBR16  mmWAVE RADAR


 0.1% of the measured range or 2mm (whichever is greater)

Max Range:

 Depending upon the transducer, from 125mm to 40m (0.41-130ft).
 50m on modified Ultra 3 and Ultra 5.
 ((0 to 2.425m (0 - 7.95ft) dBMACH3 for open channel flow)

Min Range:

 Dependent on application and transducer (maximum 40m dB40)

Echo Processing:

 Dependent on application and transducer (minimum zero dBMACH 3)

Rate Response:

 Fully Adjustable

Echo Processing :


DATEM (Digital Adaptive Tracking of Echo Movement)


Ultrasonic and FMCW RADAR

Outputs :

Analogue Output:

 Isolated (floating output (to 150V)) of 4-20 mA or 0-20 mA into 1KΩ
 (user programmable and adjustable)

Digital Output:

 Half Duplex RS232

Volt Free Contacts, Number, and Rating: 

 3 x SPCO isolated relays, rated at 5A at 250V AC and 1 Solid state SPNO   isolated relay, rated 30V at 100mA, suitable for pulse counter applications


 Monochrome graphical dot-matrix, 160 x 240 pixels.
Fully programmable display options with an integral keypad with menu navigation keys.   Program/run/test mode indicators

Programming :

On-Board Programming:

Via Integral Keypad

PC Programming:

Via Integral RJ11 port on the unit, or via SD Card slot

Programming Security:

Via passcode (user selectable and adjustable)

Programmed storage:

Via non-volatile memory

Data Logging and Removable Storage:

Via Micro SD card slot or internal 10-day totalizer logs (flow only)

SD Card Memory (included):


Supply :

Power Supply:

100 to 240V AC 50/60 Hz. DC 10-28 V

Power Consumption:

AC = 20VA MAX, DC = 10W max

Fuses, mains:

1A ‘T’ 20mm ceramic 1500A breaking

Fuses, transducer:

100mA barrier type, 4000A breaking

Communications (optional) :


Isolated RS485

Profibus DPV1:

Isolated RS485


Isolated 4-20mA


Gateway interface (pending)

Download Datasheet: Ultra 4 Pulsar Non-contacting Ultrasonic Level Control and Flow Measurement

Reference : pulsar-pm.com

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