Hach Intellical ISEF121 Fluoride Ion Selective Electrodes
Intellical ISEF121 is a digital, combination, Fluoride ion selective electrode (ISE) with a with a non-refillable gel reference with a single junction porous PTFE annular ring, and built-in temperature sensor.
Features
- Available with a 1 or 3 meter cable
- Solid-state sensor design eliminates membrane replacement and allows for dry storage
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Intellical ISEF121 is a digital, combination, Fluoride ion selective electrode (ISE) with a with a non-refillable gel reference with a single junction porous PTFE annular ring, and built-in temperature sensor. The electrode measures fluoride concentration in water samples. The laboratory version of this ISE is shockproff with its Epoxy plastic body.
The Intellical ISEF121 probe is available with a 1 or 3 meter cable and is intended for laboratory use. The ISEF181’s solid-state sensor design eliminates membrane replacement and allows for dry storage of the ISE.
The ISEF121 is ideal for measuring fluoride concentrations in wastewater, drinking water and general water quality applications.
Accuracy: |
±0.02 mV or 0.05%, whichever is greater |
Cable Length: |
1 m (3.28 ft) |
Electrode Type: |
Non-Refillable Dritek Gel Reference Element |
ISA Required: |
Fluoride ISA, (#258999) |
Junction: |
Annular Junction (PTFE) |
Kit?: |
No |
Length: |
175 mm (6.89 in.) |
Method Type: |
Laboratory: Non-Refillable Dritek Gel Reference Element |
Parameter: |
Fluoride |
Probe Type: |
Standard |
Product Kit: |
Model: ISEF121, Accessories Included: None |
Range: |
0.01 mg/L (5 x 10-7 M) - 19 g/L (1 M) F⁻ |
Reference Type: |
Ag/AgCl |
Resolution |
:Selectable up to 4 significant digits |
Sample depth: |
25.4 mm (1 in.) |
Sample Volume: |
25 mL |
Sensor material: |
Epoxy |
Sensor Type: |
Solid-state crystal membrane |
Special Features: |
Dry storage & fast response time. No replacement membranes. |
Temperature Accuracy: |
±0.3 °C (±0.54 °F) |
Temperature Range: |
5 - 50 °C (41 - 122 °F) |
Temperature Resolution: |
0.1 °C (0.18 °F) |
Test requirements: |
Parameter Needed: Fluoride, Minimum Sample Depth (mm): 26 |
Thermistor: |
ATC |
Warranty: |
6 months |
Weight: |
0.1 kg |
What's included?: |
IntelliCAL ISEF121 combination Fluoride ISE, 1 m cable (ISEF12101), Test certificate, and Basic User Manual. |
IntelliCAL ISEF121 combination Fluoride ISE, 1 m cable (ISEF12101), Test certificate, and Basic User Manual.
In The News
Cal Poly, San Luis Obispo Manages Monitoring Efforts in Morro Bay
California Polytechnic State University, San Luis Obispo (Cal Poly, SLO), has been monitoring Morro Bay for decades, and while the monitoring program has changed over the years, the dedication to monitoring the bay has remained the same. 
 
The project started in 2006 as a Packard Foundation-funded initiative to monitor water quality flowing in and out of Morro Bay. The goal at the time was to use the data collected to develop and inform an ecosystem-based management plan in collaboration with the Morro Bay National Estuary Program (MBNEP). 
 
Since the estuary was the focus at the time, researchers were monitoring water flowing into the estuary from Chorro Creek and Los Osos Creek.
Read MoreGreen Water in Green Bay: Using Data Buoys to Monitor the Southern Bay
While the bay of Green Bay has been referred to as the largest freshwater “estuary” in the world, the watershed hosts intensive agriculture and contributes one-third of Lake Michigan’s total phosphorus load. 
 
 The Fox River flows into the bay, carrying excess nutrients largely the result of non-point source runoff from the watershed. With a history of deterioration extending well into the last century, the bay ecosystem suffered significant declines in water quality. 
 
 This, in turn, stimulated major clean-up and ongoing restoration efforts to improve water quality. Tracking these changes is an important aspect of ecosystem management.
Read MoreCross-Border Sewage Contaminated Flows: Monitoring the Tijuana River
The Tijuana River runs across the US-Mexico boundary, flowing into and throughout southern California, carrying with it nutrients and contaminants throughout the estuary. In recent decades, the flows have been heavily polluted with untreated sewage from the City of Tijuana. 
 
The wastewater enters the greater Tijuana River estuary, impacting coastal communities and disrupting the natural environment. In order to better understand these cross-border flows, researchers out of San Diego University sought to monitor the waterway test the capabilities of in-situ sensors to measure the contaminated water. 
 
Natalie Mladenov and Trent Biggs were two of the researchers involved in the project, deploying a real-time monitoring system in May of 2021.
Read More