How much does the McLane sampler weigh in water?

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Discussion Overview

The discussion revolves around the buoyancy and weight specifications of the McLane sampler, particularly in relation to its performance in water. Participants are exploring the implications of the weight measurements provided for the core and pressure housing in both air and seawater, and how these relate to the design of buoyancy and ballast systems.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that the weight in air for the core and pressure housing is 102.1 kg buoyant, while the weight in seawater is stated as 150 kg buoyant, expressing confusion over why the weight appears to be greater in water.
  • Another participant questions the interpretation of the buoyant weight, suggesting that the ballast tanks may be open and filled with water during the measurement.
  • Several participants request links to the specifications of the equipment to clarify the weight claims, indicating a need for more information to understand the context of the measurements.
  • One participant provides a link to the McLane Labs website for the environmental sampling processor, but another notes that the page has been reorganized and requests clarification on the specific model being referenced.

Areas of Agreement / Disagreement

Participants express confusion regarding the weight measurements and their implications, indicating a lack of consensus on the interpretation of the buoyancy data and the specifics of the equipment being discussed.

Contextual Notes

The discussion highlights potential limitations in the provided specifications, including the need for clarity on the conditions under which the weights were measured and the specific model of the McLane sampler being referenced.

j7888
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I am trying to design the housing for an electrical core so that it remains buoyant on the surface but can be neutrally buoyant at desired depths through ballast tanks.

I am trying to figure out what the core and housing may typically weigh through specifications online of ones already made.

However, the weight in air for core and pressure housing is 102.1kg buoyant while the weight in seawater for core and pressure housing is 150kg buoyant.

I've never seen buoyant after a weight like that and I'm a little confused if it just means it weighs 150 kg. Shouldn't the weight be less in the water? The only thing I can think of is that the ballast tanks of the housing must be open and filled with water for this measurement?

Can anyone help me understand this?
 
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j7888 said:
I am trying to design the housing for an electrical core so that it remains buoyant on the surface but can be neutrally buoyant at desired depths through ballast tanks.

I am trying to figure out what the core and housing may typically weigh through specifications online of ones already made.

However, the weight in air for core and pressure housing is 102.1kg buoyant while the weight in seawater for core and pressure housing is 150kg buoyant.

I've never seen buoyant after a weight like that and I'm a little confused if it just means it weighs 150 kg. Shouldn't the weight be less in the water? The only thing I can think of is that the ballast tanks of the housing must be open and filled with water for this measurement?

Can anyone help me understand this?
It's not clear to me, either.

Can you provide the links for this equipment which quotes these weights?
 
SteamKing said:
It's not clear to me, either.

Can you provide the links for this equipment which quotes these weights?

http://www.mclanelabs.com/master_page/product-type/samplers/environmental-sample-processorenvironmental-sample-processor

The specs are in the data sheet on the left menu
 
j7888 said:
http://www.mclanelabs.com/master_page/product-type/samplers/environmental-sample-processorenvironmental-sample-processor

The specs are in the data sheet on the left menu
Thanks for the link.

However, the manufacturer has re-organized his web page somewhat. When I click on this link, it tells me that the page couldn't be found, and then directs me to a product library.

Could you specify exactly the type and model of the equipment you're trying to use?
 

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