Level Measurement

Access Instrumentation is able to supply a range of both level switches and continuous level measurement equipment from various manufacturers selecting from ultrasonic, capacitance and radar principals to best suit your application requirements. We are also able to provide automatic continuous level gauging, temperature monitoring, and density measuring of liquid media including LNG, propane, butane, ethane, or any similar cryogenic media with the Scientific Instruments Tank Gauging System.

Siemens Radar Level Measurement

Unaffected by changes of product, temperature gradients, inert gas blankets or vapours the high accuracy Siemens Radar Level Transmitters are suitable for non-contact measurement of liquids, solids, pastes, and slurries.

Radar level measurement technique offers a real alternative to differential pressure, floats and displacers the 2-wire technology and non-contact installation reduces wiring costs and allows easy implementation into existing systems.

With its range of antennas, these transmitter’s are capable of working on a large range of applications including storage tanks, buffer tanks hygienic tanks and stilling wells.


LR250_radar_familyThe SITRANS LR250 is a 2-wire, 25 GHz pulse radar level transmitter for continuous monitoring, it is your first choice for liquid level measurement in storage tanks and process vessels to 20 metres (60 ft). The LR250 is low cost, easy to install and simple to configure.

•  Water and waste water

•  Chemical and pharmaceutical industries

•  Food and beverage industry


SITRANS LR250 Flanged encapsulated antenna is for continuous monitoring of liquids and slurries in storage and process vessels including corrosives or aggressive materials, to a range of 20 m (66 ft) (antenna dependent).

SITRANS LR250 with threaded PVDF antenna is for continuous monitoring of liquids and slurries in storage and process vessels including corrosives or aggresive materials, to a range of 10 m (32.8 ft).

SITRANS LR250 Horn antenna is for continuous monitoring of liquids and slurries in storage and process vessels including high temperature and pressure, to a range of 20 m (66 ft).

SITRANS LR250 hygienic encapsulated antenna has sanitary and hygienic approvals for continuous monitoring of liquids, slurries and pastes within the Food, Beverage, chemical and pharmaceutical industries to a range of 20 m (66 ft) – antenna dependent.

Downloadable Files:



SITRANS LR200 is a 2-wire, 6 GHz pulse radar level transmitter for continuous monitoring of liquids and slurries in storage and process vessels including high temperature and pressure, to a range of 20 m (66 ft).

SITRANS LR200’s unique design allows safe and simple programming using the Intrinsically Safe handheld programmer without having to open the instrument’s lid. It also features a built-in alphanumeric display in four languages.

The SITRANS LR200 has a standard Uni-Construction polypropylene rod antenna that offers excellent chemical resistance and is hermetically sealed. The Uni-Construction antenna features an internal, integrated shield that eliminates vessel nozzle interference.

Start-up is easy with as few as two parameters for basic operation. Installation is simplified as the electronics are mounted on a rotating head that swivels, allowing the instrument to line up with conduit or wiring connections or simply to adjust the position for easy viewing. SITRANS LR200 features patented Process Intelligence signal-processing technology for superior reliability.

Key Applications: liquid bulk storage tanks, process vessels with agitators, vaporous liquids, high temperatures, asphalt, digesters.

Supplementary Components are designed to work with most types of instrumentation to provide enhanced functionality such as remote displays and remote monitoring solutions.

Downloadable File: LR200 Data Sheet.pdf

SITRANS LR560 for Solids Measurement


SITRANS LR560 2-wire, 78 GHz FMCW radar level transmitter for continuous monitoring of solids in silos to a range of 100 m (328 ft).

SITRANS LR560’s plug and play performance is ideal for most solids applications, including those with extreme dust and high temperatures to +200 ºC (+392 ºF). Unique design allows safe and simple programming using the Intrinsically Safe handheld programmer without having to open the instrument’s lid.

SITRANS LR560 includes an optional graphical local display interface (LDI) that improves setup and operation using an intuitive Quick Start Wizard, and echo profile display for diagnostic support. Startup is easy using the Quick Start wizard with a few parameters required for basic operation. SITRANS LR560 measures virtually any solids material to a range of 100 m (328 ft).

Key Applications: cement powder, plastic powder/pellets, grain, coal, wood powder, fly ash

Downloadable File: LR560 Data Sheet.pdf

 Siemens Guided Wave Radar Level Measurement


The SITRANS LG series are guided wave radar transmitters for level, level/interface, and volume measurement of liquids and solids. It is unaffected by changes in process conditions, high temperatures and pressures, and steam.

The SITRANS LG series comes in four different models,
depending on the applications, level of performance, and functionality required:




  • SITRANS LG240 offers configuration options for your hygienic application requirements
  • SITRANS LG250 Highly flexible solution for liquid level and interface applications. Extremely versatile offering solutions for storage, separation of materials or difficult ammonia applications
  • SITRANS LG260 Ideal for measuring level in medium range solids applications including; grains, plastics, and cement
  • SITRANS LG270 offers configuration options for extreme conditions including high temperature and high pressure applications such as: harsh applications found in chemical, HPI and energy industries for example, LPG gas tanks, steam boilers and distillation columns

Downloadable File: LG Data Sheet.pdf


Pulsar IMP Ultrasonic Level Probe

imgThe IMP from Pulsar is non-contacting ultrasonic level measurement without compromise. The all-in-one self-contained units have the benefit of digital echo processing specially designed for IMP. IMP can be programmed via the integral keypad or using IMP PC, IMP’s specially designed software.

IMP is available in 3m, 6m and 10m versions, and each unit is configurable either as a 2 or 3 wire device.

IMP is also available as an Intrinsically Safe (I.S.) unit, with a distinctive black cap instead of green, meeting ATEX EEx ia IIC T4 and IECEx.


  • Compact low-profile self contained intelligent level measurement
  • Calibration without compromising IP rating
  • Small 1.5″ entry thread (2″ on 10m version)
  • Simple menu set-up
  • High acoustic power with narrow beam angles
  • 125mm deadband on 3m version
  • Agitator avoidance as standard

Downloadable File: IMP Ultrasonic Level Tx Data Sheet.pdf

Siemens SITRANS LU Ultrasonic Level Probe

imgThe Siemens SITRANS Probe LU is a 2-wire loop powered ultrasonic transmitter for level, volume and flow monitoring of liquids in storage vessels, simple process vessels and in open channel flow measurement. The operating range of the Siemens SITRANS Probe LU is either 6 or 12 meters and the unit is also equipped with Auto False-Echo Suppression for fixed obstruction avoidance. The Probe LU offers two communications options, HART or PROFIBUS PA (Profile version 3.0, Class B). The transducer of the Probe LU is available with either ETFE or PVDF materials to suit different process conditions. For applications with varying material and process temperatures, the Probe LU also incorporates an internal temperature sensor to compensate for any temperature changes. Applications include: chemical storage vessels, filter beds, and liquid storage vessels.


  • SITRANS Probe LU is also available as an Intrinsically Safe (I.S.) unit,  meeting ATEX II 1G EEx ia IIC T4
  • Continuous level measurement up to 12 m (40 ft) range
  • Easy installation and simple start-up
  • Programming using infrared intrinsically safe handheld programmer, SIMATIC PDM or HART® Communicator
  • Communication using HART or PROFIBUS PA
  • ETFE or PVDF transducers for chemical compatibility
  • Auto False-Echo Suppression for fixed obstruction avoidance

Downloadable File: SITRANS Probe LU Brochure

Pulsar Ultra 3 & Ultra 5 Ultrasonic Level System

imgThe Pulsar Ultra 3 and 5 represents the leading edge of ultrasonic level measurement and control. Sophisticated, full function controllers with either 3 (Ultra 3) or 5 (Ultra 5) control/alarm relays. With wall, fascia, panel or rack mount, Ultra 3 and 5 units provide large displays with intuitive and straightforward menu programming. An Ultra system consists of a control unit and a transducer, which may be positioned up to 500 metres away. Both Ultra 3 and Ultra 5 have the option of bus type digital communications and data logging, coupled with the dB series of transducers measurement ranges from as little as 75mm right through to 40metres on solids or liquids are available.

  • Pump Control
  • Level and Volume Measurement
  • Open Channel Flow

Downloadable File: Ultra 3 & 5 Ultrasonic Level Data Sheet.pdf

Pulsar Blackbox Ultrasonic Level system

imgDeceptively simple, the Pulsar blackbox range includes all the echo processing sophistication of the Pulsar Ultra range, but in basic form without the display and on-board programming capabilities that are unnecessary in a distributed control environment. Programmed by a hand-held calibrator or from a personal computer, blackbox allows engineers to select the output to suit the application. The blackbox range also includes blackbox CSO, a dc powered data logging device specifically for monitoring Combined Sewer Overflows. All versions other than blackbox CSO can also be specified with a integral keypad and display giving complete flexibilty at an economic price.

The blackbox units can be teamed with any of the dB transducers, making a 125mm to 40m measurement ranges available.

Downloadable File: Blackbox Ultrasonic Level Data Sheet.pdf

Pulsar dB Ultrasonic Transducers

imgPulsar’s innovative dB range of transducers has taken ultrasonic level measurement into a new era. Unlike the high voltage, frequency dependent transducers of other manufacturers, which require special, protected interconnect cables, or low powered transducers built with intrinsic safety rather than performance in mind, the dB series combines low electrical power that meets intrinsic safety requirements with extraordinary high sonic power to give range and performance. Short blanking distances and narrow beam angles improve performance, especially when the signals are being analysed by Pulsar’s DATEM software. Options are available for cable mounting, flange mountings and hygienic fittings, and an aiming kit is available for solids measurement applications. dB transducers are teamed with any of Pulsar’s Ultra or blackbox ranges of control units to provide fantastic versatility, whatever the application.

Downloadable File: Pulsar dB Transducers Data Sheet.pdf

Siemens MultiRanger Ultrasonic Level Monitor/ Controller

imgThe Siemens MultiRanger is a versatile short to medium-range ultrasonic single and multi-vessel level monitor/controller for virtually any application in a wide range of industries. MultiRanger can be used on different materials, including fuel oil, municipal waste, acids, and woodchips or on materials with high angles of repose. The Siemens MultiRanger offers true dual point monitoring, digital communications with built-in Modbus RTU via RS-485, as well as compatibility with SIMATIC PDM, allowing PC configuration and setup. The Siemens MultiRanger 100 offers cost-effective level alarming, as well as on/off and alternating pump control. The Siemens MultiRanger 200 will monitor open channel flow and features more advanced relay alarming and pump control functions as well as volume conversion. Applications include: wet wells, flumes/weirs, bar screen control, hoppers, chemical storage, liquid storage, crusher bins, and dry solids storage.


  • Digital input for back-up level override from point level device
  • Communication using built-in Modbus RTU via RS-485
  • Single or dual point level monitoring
  • Auto False-Echo Suppression for fixed obstruction avoidance
  • Wall and panel mounting options

Downloadable File: Siemens Multiranger Data Sheet.pdf

Siemens LC300 & LC500 Capacitance Level Measurement (Continuous)

LC300SITRANS LC300 and LC500 are inverse frequency shift capacitance continuous level transmitter’s for liquids and solids applications.

The LC300 is ideal for standard industrial applications in chemical, hydrocarbon processing, food and beverage and mining, aggregate and cement industries. It is a 2-wire level measurement instrument combining a sophisticated, yet easy-to-adjust microprocessor with field-proven probes. It is available in two versions: rod and cable.

SITRANS LC300 has a stainless steel process connection with PFA-lined probe. Materials with low or high dielectric properties are accurately measured and Active-Shield technology helps in ignoring the effects of buildup near vessel nozzle.

Key Applications: Conductive and non-conductive media including liquids and solids in standard industrial processes and bulk solids applications involving dust or chemical processes involving vapour


  • Active-Shield technology so measurement is unaffected by material buildup in active shield section
  • Highly accurate and reliable PFA-lined probes
  • Integrated local LCD display
  • 2-wire (4 to 20 mA) current loop design
  • Current signalling according to NAMUR NE 43
  • Push-button calibration and programming

Downloadable File: LC300 Data Sheet.pdf

LC500SITRANS LC500 can be used in extreme and critical process conditions, such as oil and liquified natural gas (LNG) as well as toxic and aggressive chemicals and vapours.

SITRANS LC500’s advanced electronics provide one-step, push-button calibration and local display for easy on-site installation and setup.

The unique mechanical probe design coupled with a high performance transmitter gives superior performance in toxic and aggressive chemicals, acids, caustics, adhesives and in viscous conductive and non-conductive materials.

Key Applications: Oil/water or foam/liquid interface measurement in separators or coalescers, cryogenic applications including C02 and liquified natural gas (LNG), distillation/regeneration tanks with high temperatures


  • Active-Shield technology so measurement is unaffected by material buildup in active shield section
  • Simple push-button calibration and integrated local display
  • inverse frequency approach provides high resolution
  • 2-wire loop powered 4 to 20/20 to 4 mA measurement signal
  • Pre-detection alarm and full function diagnostics
  • High temperature and pressure resistant (optional)
  • Full-function diagnostics comply with NAMUR NE 43
  • Easy calibration locally or via HART (using SIMATIC PDM software)

Downloadable File: LC500 Data Sheet.pdf


Scientific Instruments 6290 LTD Liquefied Gas Gauging System

imgThe Scientific Instruments Inc. Model 6290 Tank Gauging System is capable of providing automatic continuous level gauging, temperature monitoring, and density measurement of liquid media. These measurements are achieved by means of a PC-based control unit and an electromechanical drive mechanism, which operates as a unit to position a multi-sensor probe assembly suspended within the liquid storage tank. The system can accommodate LNG, propane, butane, ethane, or any similar cryogenic media. The probe is moved vertically by the drive mechanism in response to commands generated by the control unit. Both automatic and manual control of the probe assembly is incorporated into the system design. All system components, which are located inside the tank, can be completely removed from the tank for inspection and/or maintenance at any time. Probe position, temperature and density readings are displayed continuously to the operator at the control unit via an alphanumeric display.

Downloadable File: 6290 LTD Brochure.pdf