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WIKA 73
WIKA 73 – Gas-atuated thermometer WIKA/Germany
Gas-actuated thermometer WIKA 73
Applications of the gas-actuated thermometer
- General process instrumentation in the chemical and petrochemical industries, oil and gas industries, energy and water/wastewater industries
- Universally suitable for machine building, plant, tank, equipment manufacturing and food industry
- Temperature measurement without medium contact
- Mounting in instrument boards, control cabinets, control panels
Special features of the gas-actuated thermometer
- Scale ranges from -200 … +700 °C [-328 … 1.292 °F]
- Fast response behaviour
- Case and stem from stainless steel
- Various connection and case mounting designs
Description of the gas-actuated thermometer
The model 73 gas-actuated thermometer has been developed
and is manufactured in accordance with the EN 13190
standard. This high-quality thermometer has been designed
especially for the requirements of the process industry.
The thermometer, completely manufactured from stainless
steel, is used particularly successfully in the chemical and
petrochemical, oil and gas, and power engineering industries.
To allow optimum fitting to the process, individual insertion
lengths and process connections are available. The
thermometers have a high ingress protection of IP65 and
can be used in outdoor applications even at negative
temperatures. With liquid dampening operation under high
vibration conditions is possible.
Due to the wide variety of possible designs, the model 73 gas-actuated thermometers can be perfectly adapted to any process connection or location.
With the contact bulb version, temperature measurements are
possible without any contact with the medium, even when the
pipe diameter is extremely small. The contact bulb is intended
for external mounting on pipes and tanks.
When it comes to harsh climatic conditions at the place of
use, the model 73 is the right choice, as it can be used at temperatures ranging from -40 °C [-40 °F] to +60 °C [140 °F]
(optionally also up to -50 °C [-58 °F] or -70 °C [-94 °F] in the
POLARgauge® version).
WIKA 73
| Standard | EN 13190 | ||||
| Nominal size | ■ 100 ■ 160 |
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| Window | Laminated safety glass | ||||
| Connection location | |||||
| A73.1×0 | Back mount (axial) | ||||
| R73.1×0 | Lower mount (radial) | ||||
| S73.1×0 | Back mount, adjustable stem and dial | ||||
| F73.1×0 | Version with capillary | ||||
| Connection designs | → For drawings, see page 9 | ||||
| S | Standard (threaded connection) 1) | ||||
| 1 | Plain stem (without thread) | ||||
| 2 | Male nut | ||||
| 3 | Union nut | ||||
| 4 | Compression fitting (sliding on stem) | ||||
| 5 | Union nut and loose threaded connection | ||||
| 6 | Compression fitting (can be adjusted on either capillary or spiral protective sleeve) | ||||
| 7 | Compression fitting on the case 1) | ||||
| “Adjustable stem and dial” case version | 90° swivelling and 360° rotatable | ||||
| Dampening (option) | ■ With liquid dampening (silicone oil) ■ With food-compatible liquid dampening |
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| Materials (non-wetted) | |||||
| Case, ring | Stainless steel 1.4301 | ||||
| Pointer | Aluminium, black, micro adjustment | ||||
| Articulated joint (“adjustable stem and dial”) | Stainless steel | ||||
| Dial | Aluminium (white) | ||||
| Measuring element | |||||
| Type of measuring element | Gas-pressure inert gas filling, physiologically safe | ||||
| Working range | |||||
| Continuous load (1 year) | Measuring range (EN 13190) | ||||
| Short time (max. 24 h) | Scale range (EN 13190) | ||||
| Materials of the movement (wetted) | ■ Combination of brass and stainless steel ■ Completely from stainless steel |
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| Capillary | |||||
| Diameter | 2 mm | ||||
| Length | Capillary without spiral protective sleeve | Max. 60 m | |||
| Capillary with spiral protective sleeve | Max. 40 m | ||||
| Capillary with spiral protective sleeve and PVC coating | Max. 20 m | ||||
| Minimum bending radius | Capillary without spiral protective sleeve | 6 mm | |||
| Capillary with spiral protective sleeve | 20 mm | ||||
| Capillary with spiral protective sleeve and PVC coating | 30 mm | ||||
| Spiral protective sleeve | 7 mm | ||||
| Material (non-wetted) | Stainless steel 1.4571 | ||||
| Mounting types for instruments with capillary | ■ Surface mounting flange, stainless steel ■ Instrument mounting bracket, aluminium die-casting ■ Panel mounting flange, stainless steel ■ Triangular bezel with clamp, stainless steel |
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| Contact bulb | |||||
| Dimensions | 120 x 22 x 12 mm | ||||
Mounting types |
■ Mounting on pipes ■ Mounting on tanks→ For further information, see page 18 |
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| Material | Stainless steel 1.4571 | ||||
| Accuracy class | Class 1 per EN 13190 at 23 °C ±10 °C ambient temperature | ||||
| Unit | ■ °C ■ °F ■ °C/°F (dual scale) |
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| Dial | |||||
| Scale graduation | ■ Single scale ■ Dual scale |
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| Scale colour | Single scale | Black | |||
| Dual scale | Red | ||||
| Others on request | |||||
| Process connections | |||||
| Thread size | ■ Plain, without thread ■ G ½ B ■ ½ NPT ■ G ½ female ■ ½ NPT female ■ M20 x 1.5 ■ M24 x 1.5 femaleOthers on request |
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| Materials (wetted) | Stainless steel 316SS | ||||
| Stem | |||||
| Diameter | ■ 6 mm ■ 8 mm ■ 10 mm ■ 12 mm |
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| Material (wetted) | Stainless steel 316SS | ||||
| Operating conditions | |||||
| Ambient temperature (on case) | ■ -40 … +60 °C [-40 … +140 °F]
■ -50 … +60 °C [-58 … +140 °F] (extended range) ■ -70 … +60 °C [-94 … +140 °F] (for extremely low temperature ranges) |
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| Storage temperature | |||||
| Without liquid dampening | -50 … +70 °C [-58 … +158 °F] | ||||
| With liquid dampening | -40 … +70 °C [-40 … +158 °F] | ||||
| Max. operating pressure at the stem | Max. 25 bar, static | ||||
| Ingress protection per IEC/EN 60529 | ■ IP65 ■ IP66 |
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