[fusion_builder_container type="flex" hundred_percent="no" hundred_percent_height="no" min_height="" hundred_percent_height_scroll="no" align_content="stretch" flex_align_items="flex-start" flex_justify_content="flex-start" flex_column_spacing="" hundred_percent_height_center_content="yes" equal_height_columns="no" container_tag="div" menu_anchor="" hide_on_mobile="small-visibility,medium-visibility,large-visibility" status="published" publish_date="" class="" id="" link_color="" link_hover_color="" border_sizes="" border_sizes_top="" border_sizes_right="" border_sizes_bottom="" border_sizes_left="" border_color="" border_style="solid" spacing_medium="" margin_top_medium="" margin_bottom_medium="" spacing_small="" margin_top_small="" margin_bottom_small="" margin_top="" margin_bottom="" padding_dimensions_medium="" padding_top_medium="" padding_right_medium="" padding_bottom_medium="" padding_left_medium="" padding_dimensions_small="" padding_top_small="" padding_right_small="" padding_bottom_small="" padding_left_small="" padding_top="" padding_right="" padding_bottom="" padding_left="" box_shadow="no" box_shadow_vertical="" box_shadow_horizontal="" box_shadow_blur="0" box_shadow_spread="0" box_shadow_color="" box_shadow_style="" z_index="" overflow="" gradient_start_color="" gradient_end_color="" gradient_start_position="0" gradient_end_position="100" gradient_type="linear" radial_direction="center center" linear_angle="180" background_color="" background_image="" background_position="center center" background_repeat="no-repeat" fade="no" background_parallax="none" enable_mobile="no" parallax_speed="0.3" background_blend_mode="none" video_mp4="" video_webm="" video_ogv="" video_url="" video_aspect_ratio="16:9" video_loop="yes" video_mute="yes" video_preview_image="" absolute="off" absolute_devices="small,medium,large" sticky="off" sticky_devices="small-visibility,medium-visibility,large-visibility" sticky_background_color="" sticky_height="" sticky_offset="" sticky_transition_offset="0" scroll_offset="0" animation_type="" animation_direction="left" animation_speed="0.3" animation_offset="" filter_hue="0" filter_saturation="100" filter_brightness="100" filter_contrast="100" filter_invert="0" filter_sepia="0" filter_opacity="100" filter_blur="0" filter_hue_hover="0" filter_saturation_hover="100" filter_brightness_hover="100" filter_contrast_hover="100" filter_invert_hover="0" filter_sepia_hover="0" filter_opacity_hover="100" filter_blur_hover="0"][fusion_builder_row][fusion_builder_column type="1_1" layout="1_1" align_self="auto" content_layout="column" align_content="flex-start" content_wrap="wrap" spacing="" center_content="no" link="" target="_self" min_height="" hide_on_mobile="small-visibility,medium-visibility,large-visibility" sticky_display="normal,sticky" class="" id="" type_medium="" type_small="" order_medium="0" order_small="0" dimension_spacing_medium="" dimension_spacing_small="" dimension_spacing="" dimension_margin_medium="" dimension_margin_small="" margin_top="" margin_bottom="" padding_medium="" padding_small="" padding_top="" padding_right="" padding_bottom="" padding_left="" hover_type="none" border_sizes="" border_color="" border_style="solid" border_radius="" box_shadow="no" dimension_box_shadow="" box_shadow_blur="0" box_shadow_spread="0" box_shadow_color="" box_shadow_style="" background_type="single" gradient_start_color="" gradient_end_color="" gradient_start_position="0" gradient_end_position="100" gradient_type="linear" radial_direction="center center" linear_angle="180" background_color="" background_image="" background_image_id="" background_position="left top" background_repeat="no-repeat" background_blend_mode="none" animation_type="" animation_direction="left" animation_speed="0.3" animation_offset="" filter_type="regular" filter_hue="0" filter_saturation="100" filter_brightness="100" filter_contrast="100" filter_invert="0" filter_sepia="0" filter_opacity="100" filter_blur="0" filter_hue_hover="0" filter_saturation_hover="100" filter_brightness_hover="100" filter_contrast_hover="100" filter_invert_hover="0" filter_sepia_hover="0" filter_opacity_hover="100" filter_blur_hover="0" last="true" border_position="all" first="true"][fusion_text columns="" column_min_width="" column_spacing="" rule_style="default" rule_size="" rule_color="" content_alignment_medium="" content_alignment_small="" content_alignment="" hide_on_mobile="small-visibility,medium-visibility,large-visibility" sticky_display="normal,sticky" class="" id="" font_size="" fusion_font_family_text_font="" fusion_font_variant_text_font="" line_height="" letter_spacing="" text_color="" animation_type="" animation_direction="left" animation_speed="0.3" animation_offset=""] There are two principal methods of measuring total dissolved solids: gravimetic and conductivity . The standard method is gravimetric, which is considered the most accurate and involves evaporating the sample to dryness at 103 °C, then to 180 °C to remove any occluded water, (water molecules trapped in mineral matrix), then weighing it with a precision analytical balance (normally capable of 0.0001 gram accuracy). This method is generally considered best, although it is slow and has inaccuracies from low-boiling-point chemicals which evaporate with the water. TDS of water is directly related to the conductivity of dissolved ionized solids in the water. Ions from the dissolved solids create the ability for water to conduct an electrical current, which is measured by the IC Controls 210-C(TDS) analyzer , and immediately displayed as sodium chloride ppm or mg/L or µS/cm conductivity. When periodically standardized with IC Controls TDS standards or by laboratory gravimetric TDS measurement, TDS analyzers based on conductivity provide a quick accurate value of the TDS. Learn more: Blog – Meeting Environmental Standards for TDS in Wastewater Treatment Technical Article – Total Dissolved Solids Measurement [/fusion_text][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container]

FAQs Archive - IC Controls

5 03, 2025

What is the impact of the new 2025 tariffs?

Rosalie Fitzpatrick2025-03-05T18:21:01-05:00March 5th, 2025|

Thermo Orion Process Products are largely under the Chemical Analysis Instruments HS category. - As of March 4th, 2025 there are no tariffs on this category of HS code. - Products are made worldwide so tariffs would only apply if made in the USA. Some Thermo brand products are made right here in Canada. - Example: 211190/91 DIPA for the Model 2111XP/LL Sodium Analyzers, not made in the USA. There is not anticipated to be any tariff on this popular item. Questions about your specific product, email sales@iccontrols.com

7 06, 2022

How can you calibrate a TDS analyzer?

Rosalie Fitzpatrick2022-06-07T14:58:46-04:00June 7th, 2022|

There are two ways to measure TDS - Total Dissolved Solids: 1. The gravimetric method is considered the most accurate and involves evaporating the sample to dryness at 103 °C, then to 180 °C to remove any occluded water, then weighing it with a precision balance capable of 0.0001 gram. Gravimetric analysis is [...]

7 06, 2022

What is the difference between ppm and mg/L?

Rosalie Fitzpatrick2022-06-07T14:54:17-04:00June 7th, 2022|

Parts per million TDS or ppm (abbreviated) is an expression of quantity, mg/L (milligrams per liter) is an expression of weight. Both are used as scales for TDS, but ppm is more popular. There is no conversion factor since 1 ppm = 1 mg/L. Learn more: Blog – Meeting Environmental Standards for TDS in [...]

7 06, 2022

What is the relationship between TDS and Conductivty?

Rosalie Fitzpatrick2022-06-07T14:52:23-04:00June 7th, 2022|

TDS ions from dissolved solids create the ability for water to conduct an electrical current, which is measured by the IC Controls 210-C(TDS) analyzer and immediately displayed as sodium chloride ppm or mg/L, or as a conductivity analyzer displayed as µS/cm. When directly measured in process the conductivity detected is not neutralized. IC [...]

7 06, 2022

How is TDS measured?

Rosalie Fitzpatrick2022-06-07T14:30:38-04:00June 7th, 2022|

There are two principal methods of measuring total dissolved solids: gravimetic and conductivity. The standard method is gravimetric, which is considered the most accurate and involves evaporating the sample to dryness at 103 °C, then to 180 °C to remove any occluded water, (water molecules trapped in mineral matrix), then weighing it with [...]

7 06, 2022

What is TDS vs TSS? Total Dissolved Solids vs Total Suspended Solids

Rosalie Fitzpatrick2022-06-07T14:21:07-04:00June 7th, 2022|

Total Dissolved Solids (TDS) is a measure of the sum of all inorganic and organic substances in a liquid in molecular, ionized or micro-granular colloidal suspended form. The solids must be small enough to survive filtration through a sieve the size of two micrometer. TDS solids are normally found in all freshwater systems. Major [...]

6 04, 2022

When to measure Free Available Chlorine versus Total Free Chlorine?

Rosalie Fitzpatrick2022-04-06T15:14:24-04:00April 6th, 2022|

Drinking Water and Well Water applications where the user needs to control the chlorination due to active disinfecting, measure Free Available Chlorine and Total Free Chlorine. Free Available Chlorine measurement - is used when you have steady, predictable pH. Total Free Chlorine measurement - is used when you have variable/ unpredictable pH and/ [...]

6 04, 2022

Compare Free Available Chlorine to Total Free Chlorine to Combined Chlorine to Total Residual Chlorine

Rosalie Fitzpatrick2022-04-06T15:15:22-04:00April 6th, 2022|

Free Available Chlorine refers to the hypochlorous acid (HOCl) form of chlorine only. It is the free, uncombined form of chlorine that is effective for disinfection. View Free Available Chlorine Analyzer - Model 875-25 Total Free Chlorine refers to the sum of hypochlorous acid (HOCl) and hypochlorite ion OCl-). The hypochlorite ion is [...]

2 03, 2022

What is the conductivity of pH buffers?

Rosalie Fitzpatrick2022-03-02T22:34:43-05:00March 2nd, 2022|

Low conductivity standards have a conductivity in the range of 1600 to 2000 μS/cm. Standard pH standards 4, 7, 10 have a conductivity of about 55,000 μS/cm. Learn more - Instrumentation and Operational Considerations for On-Line pH Measurement in Samples Below 10 μS/cm Conductivity Quick link - all pH Standards / pH Buffers [...]

28 02, 2022

How often should I replace the membrane module on my Dissolved Oxygen system?

Rosalie Fitzpatrick2022-02-28T21:45:47-05:00February 28th, 2022|

The primary ongoing maintenance item in the ppb Dissolved Oxygen measurement system is the membrane module on the sensor. It may need to be replaced once or twice a year depending on the application and installation. Portable ppb Dissolved Oxygen systems such as the Model 869 needs may need more maintenance than the [...]

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