thermometer with switch contacts

Bimetal thermometer with switch contacts

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Bimetal thermometer with switch contacts

Wherever the process temperature has to be indicated locally and, at the same time, limit values must be monitored, thermometers with switch contacts find their application.

The switch contacts make or break the circuit dependent upon the pointer position of the indicating measuring instrument. If the reading is significantly above or below a set value, they trigger an alarm, hence also the term “alarm contact”. The instruments are also suitable for starting, stopping or switching processes

Wherever the process temperature has to be indicated locally, and, at the same time, circuits are to be made or broken, the bi-metal thermometer with switch contact can be used.

The switch contacts are adjustable over the full extent of the scale range. The instrument pointer (actual value pointer) moves freely across the entire scale range, independent of the setting.

The set pointer can be adjusted using a detachable adjustment key (mounted to the junction box) in the window.

Switch contacts consisting of several contacts can also be set to a single setpoint. Contact actuation is made when the actual value pointer travels beyond or below the desired set value.

As switch contacts sliding contacts, inductive contacts – for requirements to ATEX – or electronic contacts for triggering a PLC are available.

Application

  • Control and regulation of industrial processes
  • Monitoring of plant and switching of electric circuits
  • The chemical industry, petrochemical industry, process technology, and food industry
  • For aggressive medium

Technical Features

  • High reliability and long service life
  • Universal application
  • Case and stem material stainless steel
  • Gauges with inductive contacts for use in hazardous areas with ATEX approval
  • Gauges with electronic contacts for PLC applications

Measuring element

  • Bimetal coil

Nominal size in mm

  • 100

Connection designs

  • S Standard (threaded connection)
  • 1 Plain stem (without thread)
  • 2 Male nut
  • 3 Union Nut
  • 4 Compression fitting (sliding on the stem)
  • 5 Union nut and loose threaded connection

Accuracy class

  • DIN 16196

Working range

  • Normal (1 year): Measuring range (DIN 16196)
  • Short time (24 h max.): Scale range (DIN 16196)

Case and bayonet ring

  • Stainless steel 1.4301

Stem and process connection

  • Stainless steel 1.4571

Dial

  • Aluminium white, black lettering

Window

  • Instrument glass

Pointer

  • Aluminum, black, adjustable pointer

Electrical connection

  • Cable terminal box

Permissible operating pressure at the stem

  • max. 25 bar, static

Permissible ambient temperature at case

  • -20 … +60 °C (others on request)

Temperature limits for storage and transport

  • -20 … +60 °C (EN 13190)

Ingress protection

  • IP65 per IEC/EN 60529

Switch contacts

Inductive contact model 831

  • Long service life due to non-contact sensor
  • Additional control unit required
  • With corresponding control unit suitable for use in zone 1 / 21 (2 GD) hazardous areas
  • Low influence on the indication accuracy
  • Fail-safe switching at the high switching frequency
  • Insensitive to corrosion
  • Up to 2 switch contacts per measuring instrument

Electronic contact model 830 E

  • For direct triggering of a programmable logic controller (PLC)
  • No additional control unit required
  • Long service life due to non-contact sensor
  • Low influence on the indication accuracy
  • Fail-safe switching at the high switching frequency
  • Insensitive to corrosion
  • Up to 2 switch contacts per measuring instrument

Switching function

  • The switching function of the switch is indicated by index 1 or 2.
  • Model 8xx.1: Normally open (clockwise pointer motion)
  • Model 8xx.2: Normally closed (clockwise pointer motion)

 

Digital Pressure Gauge WIKA

Digital Pressure Gauge WIKA

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Digital Pressure Gauge WIKA

A digital pressure gauge displays the acting pressure in an integrated digital display. WIKA offers digital pressure gauges for general industrial applications and also for use in the field of testing and calibration. The indicator cases of our digital pressure gauges are rotatable for easy viewing if required and thus always ensure good readability. In addition, and intrinsically safe versions and instruments with wireless interface versions are also available.

Digital pressure gauge Model CPG1500

The model CPG1500 precision digital pressure gauge takes the concept of an analog gauge and raises it to a level only matched by digital calibrators. The accuracy of digital measurement technology and the simplicity of an analog gauge are combined together to create the digital pressure gauge CPG1500, which in terms of performance, ease-of-use, and instrument features, is unmatched in the pressure measurement market.

Accuracy

The digital pressure gauge CPG1500 offers an accuracy of 0.1 % of span (optional 0.05% up to 0.025% of span) and is temperature-compensated in the range of -10 … +50 °C (14 … 122 °F). Readings can be displayed in one of 21 standard units or also in customer-specific units, so that intricate conversion is avoided.

Sampling rate

The measuring rate can be user-defined to match the type of measurement required. Standard applications usually use three measured values per second. If required, this rate can also be set to 50 measured values per second. Via an energy-saving function, the digital pressure gauge CPG1500 switches automatically into “sleep” mode, in this mode, the battery life can be increased up to 2,500 hours.

Features

Through the new and innovative menu navigation, simple operation is ensured. The clear display, with integral bar graph display and large text area, assists with the effective analysis of the widest variety of measuring points. With the MIN/MAX function, the highest and lowest pressures can be accessed immediately and saved automatically.

Applications of the digital pressure gauge

  • Oil and gas industry
  • Maintenance and service facilities
  • Calibration service companies and service industry
  • Simple calibrations directly on site

Special features of the digital pressure gauge

  • Measuring ranges up to 0 … 1,000 bar (0 … 150,000 psi) (vacuum and absolute pressure ranges also available)
  • Accuracy: Up to 0.025 % (incl. calibration certificate)
  • Intrinsically safe version
  • Logger function with up to 50 measured values per second
  • Communication with WIKA-CAL software over WIKA-Wireless

Measuring range

Type of pressure

  • Gauge pressure, absolute pressure (up to 20 bar abs. (290 psi abs.)) and vacuum measuring ranges

Gauge pressure (bar)

0 … 0.1 / 0 … 0.25 / 0 … 0.4 / 0 … 0.6 / 0 … 1 / 0 … 1.6 / 0 … 2.5 / 0 … 4 / 0 … 6 / 0 … 10 / 0 … 16 / 0 … 25 / 0 … 40 / 0 … 60 / 0 … 100 / 0 … 160 / 0 … 200 / 0 … 250 / 0 … 400 / 0 … 600 / 0 … 700 / 0 … 1,000 / 0 … 1,600 / 0 … 2,500 / 0 … 4,000 / 0 … 6,000 / 0 … 7,000 / 0 … 8,000 / 0 … 10,000

Absolute pressure (bar)

0 … 0.25 / 0 … 0.4 / 0 … 0.6 / 0 … 1 / 0 … 1.6 / 0 … 2.5 / 0 … 4 / 0 … 6 / 0 … 7 / 0 … 10 / 0 … 16 / 0 … 20 / 0 … 25 / 0 … 40

Vacuum and +/- measuring ranges (bar)

-0.25 … +0.25 / -0.4 … +0.4 / -0.6 … +0.6 / -1 … 0 / -1 … +0.6 / -1 … 1.5 / -1 … 2.5 / -1 … 3 / -1 … 5 / -1 … 7 / -1 … 9 /-1 … 10 / -1 … 15 / -1 … 24 / -1 … 25 / -1 … 39 / -1 … 40

Sensor technology

Compensated temperature range

  • -10 … +50 °C (14 … 122 °F)

Process connection

  • G ½ B, G ¼ B, ½ NPT, ¼ NPT, G 1 B flush, G ½ B flush
  • M16 x 1.5 female with sealing cone
  • M20 x 1.5 female with sealing cone
  • 9/16 – 18 UNF female F 250-C

Pressure medium

  • All liquids and gases which are compatible with 316 stainless steel

Adjustment

  • Offset and span factor adjustable

Display

  • 5 ½ digit 7-segment display including a large matrix area for an auxiliary information Bar graph, 0 … 100 % Selectable backlighting

Rotatable case

  • The case is rotatable by 330°.

Resolution

  • 4 … 5 ½ digit; adjustable; dependent on the selected pressure unit

Material

Wetted parts

  • ≤ 1,000 bar: Stainless steel 316
  • > 1,000 bar: Stainless steel 1.4534
  • -1 … < 40 bar: Stainless steel 316
  • > 40 … 1,000 bar: Stainless steel 316 + Elgiloy cells 2.4711

Case

  • Aluminum die-casting, nickel-plated

Voltage supply

  • 3 x 1.5 V AA alkaline batteries

Maximum voltage

  • DC 4.95 V (spark ignition)

Battery life

  • typical 2,000 … 2,500 h (without backlighting and WIKA-Wireless not active)

Frequency range

  • 2,400 … 2,500 MHz

 

Bourdon tube pressure gauge with switch

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Bourdon tube pressure gauge with switch contacts model PGS23 WIKA

Wherever the process pressure has to be indicated locally, and, at the same time, circuits are to be made or broken, the model PGS23.1×0 switchGAUGE can be used.

Switch contacts (electrical alarm contacts) make or break an electric control circuit dependent upon the position of the instrument pointer. The switch contacts are adjustable over the full extent of the scale range (see DIN 16085), and are mounted predominantly below the dial, though also partly on top of the dial. The instrument pointer (actual value pointer) moves freely across the entire scale range, independent of the setting.

The set pointer can be adjusted using a removable adjustment key in the window.

Switch contacts consisting of several contacts can also be set to a single set point. Contact actuation is made when the actual value pointer travels beyond or below the desired set point.

The pressure gauge is manufactured in accordance with DIN 16085 and fulfils all requirements of the relevant standards (EN 837-1) and regulations for the on-site display of the working pressure of pressure vessels.

As switch contacts magnetic snap-action contacts, reed switches, inductive contacts – for requirements to ATEX – or electronic contacts for triggering a PLC are available.

Applications

  • Control and regulation of industrial processes
  • Monitoring of plants and switching of electric circuits
  • For gaseous and liquid aggressive media that are not highly viscous or crystallising, also in aggressive ambience
  • Process industry: Chemical, petrochemical, power plants, mining, on- and offshore, environmental technology, machine building and general plant construction

Technical Feature

Nominal size in mm

  • 100
  • 160

Accuracy class

  • 1.0

Scale Ranges

  • 0 … 0.6 to 0 … 1,600 bar or all other equivalent vacuum or combined pressure and vacuum ranges

Pressure limitation

Steady:

  • Full-scale value

Fluctuating:

  • 0.9 x full-scale value

Short time:

  • 1.3 x full-scale value

Permissible temperature

Ambient:

  • -20 … +60 °C for unfilled instruments or instruments with silicone oil filling

Medium:

  • +200 °C maximum with unfilled instruments
  • +100 °C maximum with filled instruments

Temperature effect

  • When the temperature of the measuring system deviates from the reference temperature (+20 °C): max. ±0.4 %/10 K of full-scale value

Process connection

  • Stainless steel 316L
  • Lower mount (radial) or lower back mount
  • G ½ B (male), SW 22

Pressure element

  • Stainless steel 316L
  • C-type or helical type

Movement

  • Stainless steel

Dial

  • Aluminium, white, black lettering

Pointer

  • Instrument pointer: Aluminium, black
  • Set pointer: Red

Case

  • Stainless steel

Window

  • Laminated safety glass

Ring

  • Bayonet ring, stainless steel

Electrical connection

  • Cable terminal box

Ingress protection per IEC/EN 60529

  • IP54

Switch contacts

Magnetic snap-action contact model 821

  • No control unit and no power supply required
  • Direct switching up to 250 V, 1 A
  • Up to 4 switch contacts per measuring instrument

Inductive contact model 831

  • Long service life due to non-contact sensor
  • Additional control unit required (model 904.xx)
  • With corresponding control unit suitable for use in zone 1 / 21 (2 GD) hazardous areas
  • Low influence on the indication accuracy
  • Fail-safe switching at the high switching frequency
  • Insensitive to corrosion
  • Up to 3 switch contacts per measuring instrument

Electronic contact model 830 E

  • For direct triggering of a programmable logic controller (PLC)
  • 2-wire system (option: 3-wire system)
  • Long service life due to non-contact sensor
  • Low influence on the indication accuracy
  • Fail-safe switching at the high switching frequency
  • Insensitive to corrosion
  • Up to 3 switch contacts per measuring instrument

Reed switch model 851

  • No control unit and no power supply required
  • Direct switching up to 250 V, 1 A
  • Also suitable for direct triggering of a programmable logic controller (PLC)
  • Free from wear as without contact
  • NS 100: Maximum two change-over contacts per measuring instrument
  • NS 160: Maximum one changeover contact per measuring instrument (switching voltages AC < 50 V and DC < 75 V, switch contact not adjustable from outside)

Switching function

The switching function of the switch is indicated by index 1, 2 or 3.

  • Model 8xx.1: Normally open (clockwise pointer motion)
  • Model 8xx.2: Normally closed (clockwise pointer motion)
  • Models 821.3 and 851.3: Change-over; one contact breaks and one contact makes simultaneously when the pointer reaches set point