2017-12-22

Shallow Water Dissolved Oxygen Micro-sensor

Shallow Water Micro-sensor for Dissolved Oxygen
For very fast vertical and horizontal profiling

The galvanic dissolved oxygen micro-sensor for shallow water has been developed above all for the very fast in-situ depth profiling with CTD probes and for horizontal profiling with towed unduclating vehicles, ROVs or AUVs in rivers, lakes and oceans. Because of the partial pressure of the gaseous O2 , the analyte permeates through the membrane. Inside of the sensor the oxygen reacts electrochemically at the working electrode. This causes a current corresponding to the partial pressure of the dissolved oxygen.

The sensor has a very short response time of down to some hundred milliseconds for t90% . Streaming, as it is well-known from all the other Clark-type membrane covered oxygen sensors, is not necessary. Therefore profiling with very high local resolution is possible. Both turbid, muddy and coloured solutions do not affect the sensor signal.

For measuring the oxygen saturation, the sensor has to be combined with a temperature measurement. If the oxygen concentration has to be determined, the additional measurement or knowledge of the conductivity/salinity is required. The maximum deployment depth is 100 m. All sensors are delivered with temperature compensation data.

2017-10-12

Things to Consider When Buying Carbon Monoxide Sensors

Before you buy, it’s good to break down exactly what to look for in a carbon monoxide Sensor. We’ll highlight several key factors that were part of our decision-making process to help you become a more informed consumer, but if you’d like to skip to the details on our recommended models, you can do that here.

Carbon Monoxide Sensor (CO Sensor) 4-Electrode

What Are the Symptoms of Carbon Monoxide Poisoning?

Carbon Monoxide doesn’t have a smell or taste, so you might not know right away that you’re being poisoned, but your body will. If you have carbon monoxide poisoning, you may feel dizzy, become nauseous, throw up, develop a headache, get confused, or pass out. It’s often been said that the signs of CO poisoning might resemble the flu.

Every year, 400 Americans die from accidental carbon monoxide poisoning (from fuel burning, not fires), and 20,000 are admitted to the emergency room.1 If you become unconscious while carbon monoxide is filling your home, it can be life threatening. That's where carbon monoxide Sensors come into play. Once installed, they can alert you about high levels of carbon monoxide in your home, which will give you more time to get to safety.

Who Is Most Susceptible to CO Poisoning?

Everyone is susceptible to carbon monoxide poisoning. But, according to the Centers for Disease Control and Prevention (CDC), children, older adults, people who are physically ill, and pets are more likely to be affected by CO.2 The Mayo Clinic adds that unborn babies’ blood cells take in more CO than adult blood cells, which makes them more susceptible to poisoning.3 Older adults who experience high levels of CO could be more likely to incur brain damage.

When it comes down to it, a CO Sensor can help save your life and the lives of the people you love.

What to Do If You Suspect High Levels of Carbon Monoxide

If you or your family members experience carbon monoxide poisoning symptoms, quickly walk outside for fresh air and call 911. Even if you start to feel better, you can still have toxic levels of CO in your system and might require medical help. In this situation, it’s a good idea to have your whole family checked for poisoning, including your pets. Signs of carbon monoxide poisoning don’t always happen right away—it can happen over the period of days and possibly even weeks, depending on the levels of CO in your home.

What Is a Carbon Monoxide Sensor?

Carbon monoxide Sensors are a lot like smoke Sensors, but instead of looking for signs of fire, they detect levels of carbon monoxide. Depending on the brand, Sensors operate in one of three ways: with a biomimetic sensor, metal oxide semiconductor, or electrochemical sensor.

Biomimetic Sensors use gels that change color after absorbing a certain amount of carbon monoxide—and then a sensor sounds an alarm. Metal oxide semiconductors have silica chips that detect CO and send electrical signals to trigger an alarm. Electrochemical sensors are considered to be the best in the industry. They use electrodes in chemical solutions that sense changes in electrical currents when carbon monoxide is present, and they sound an alarm.

If you have a professionally monitored security system installed, it should come with a CO Sensor.

Where to Install Carbon Monoxide Sensors

The Consumer Product Safety Commission recommends putting a carbon monoxide Sensor outside every separate sleeping area in your home.4 You might also want to add a carbon monoxide Sensor in your kitchen and basement for added safety. Also, make sure you install Sensors close to bedrooms so alarms will wake you up if you're sleeping.

If you have an attached garage, you’ll want to place a CO Sensor by the entranceway. A vehicle that’s been left running in a closed space is a common cause for CO poisoning. In the grand scheme of things, it’s better to be overly cautious by placing CO Sensors in every room, floor, and hallway than suffering CO poisoning.

How to Maintain a Carbon Monoxide Sensor

Most carbon monoxide Sensors last an average of five years. Although the product’s lifetime will vary depending on your make and model, you can still get the most out of your Sensor by wiping it down weekly to keep it clean from dust and debris.

It’s also a good idea to test your CO Sensor monthly. Start by pressing the “test” button to ensure the siren works. If your Sensor is older, you can purchase a carbon monoxide test kit to ensure that it’s fully functional. If the Sensor doesn’t go off when you test it, it’s probably time to buy a new one.

2017-03-10

FSM-T-01 Pre-calibrated Module for Methane Gas

Gas concentration is digitally and quantitively output by means of communications
Alarm output can be set through programming
Factory calibrated, temperature compensated
Compact size, low cost

Model Number: FSM-T-01

Product Specification

FSM-T-01 Pre-calibrated Module for Methane Gas

Features:

Gas concentration is digitally and quantitively output by means of communications
Alarm output can be set through programming
Factory calibrated, temperature compensated
Compact size, low cost

Applications

Front-end solution for methane gas alarm
Simple methane gas alarm output

FSM-T-01 is a pre-calibrated module for methane gas alarm which applies TGS2611 sensor together with optimized classic circuit measuring methane gas concentration. The module is pre-calibrated by Figaro's highly accurate calibration equipment and manufactured with mature aging process. The purpose of the module design is to save the development and production cost of the user to its greatest extent, making it easier and more convenient for them to manufacture gas alarm for civil natural gas.

The module is designed with two different interfaces considering the convenience for use. TTL level’s asynchronous communication interface allows the user to read real time gas concentrations with very simple commands;also different alarm thresholds can be set through communication programming. When the gas concentration reaches set value alarm output signal would be generated automatically from the alarm terminal.

Besides , this compact sized module applies a socket type design which facilitates regular replacements of the sensors. For some main board, different modules can also be replaced simply by plugging and pulling out, fulfilling the functions of detection and alarming for methane and other gases.

Specifications:

Name	Methane gas sensor module
Module No.	FSM-T-01
Gas sensor	TGS2611-E00
Range	0~20% LEL
Accuracy	≤ ±2.5% LEL(4000ppm~5000ppm)
	≤ ±5% LEL(full scale)
Response time (T90)	≤ 30s
Operating	-10℃~+55℃,25~95%RH
Storage	-25℃~+60℃,20~95%RH
Input voltage	5.0±0.2V DC
Power consumption(MAX)	≤ 0.5 W
Net Weight	<15g
Dimensions	27.2×22.8×17 mm
Standard Test Conditions	Environment	20±2℃,65±5%RH
	Loop	5.0±0.2V DC
	Warming-up time	≥ 5 min

more: Gas Sensors| Semiconductor Gas Sensors

2017-02-15

Sensorex New "Calomel Free" Epoxy and Glass Body pH and Reference Electrodes - S200CIT Series

Model Number: S200CIT Series
category：PH/ORP/Conductivity sensors

Sensorex New

Fast Response...No Silver Ion Contamination
Use in Place of Calomel pH and Reference Electrodes
Combination Triple Junction Design
Uses No Hazardous Calomel Based Material (MERCURY-
FREE!)/RoHS compliant
Sealed and Refillable Models
Glass and Epoxy Body Models
Calomel Free pH electrodes!
The performance of a Calomel electrode is now available without
the hazardous Mercury associated with the design. The "Calomel
Free" design features an Ag/AgCl based double junction reference
with a unique
silver ion trap
acting as a third junction to impede any
silver ion contact with the sample. Reference output is adjusted to
deliver the same output as a Calomel electrode using a silver
chloride reference.
Glass or Plastic Body Electrodes!
Traditionally, pH electrodes have been made of all glass construc
tion. However, today’s thermoplastics are able to construct pH elec
trodes with durable and chemically resistant bodies to reduce any
breakage. The protected design of the plastic body electrode
extends over the measuring surface, making the pH glass bulb
virtually unbreakable.
Sealed vs. Refillable Reference!
Both sealed and refillable styles are available. Sealed references are
gel-filled and maintenance free while refillable designs extend
electrode life by having a refillable reference electrolyte.

2017-01-18

RPS-450 & RPS-475 Ultrasonic Proximity Sensor

· RPS-450 in Plastic Housing
· RPS-475 in Stainless Steel Housing
· Self Contained
· Narrow Sensing Beam
· High Frequency
· LED Indicator
· Potentiometer For Set-up
· Environmentally Sealed Housing
· Operates in Hostile Environment
· N.O. N.C. Solid State Relay Outputs

Model Number: RPS-450 / RPS-475
Data Sheet:
category：Sensor| ultrasonic sensor

Product Specification

RPS-450 & RPS-475

Ultrasonic Proximity Sensor

Features
· Self Contained
· Range 5 to 30 or 10 to 72 in.
· Narrow Sensing Beam
· High Frequency
· LED Indicator
· Potentiometer For Set-up
· Environmentally Sealed Housing
· Operates in Hostile Environment
· Operating Voltage 120VAC (60Hz)
· N.O. N.C. Solid State Relay Outputs
· RPS-450 in Plastic Housing
· RPS-475 in Stainless Steel Housing

The RPS-450, 475 are stud-mount, completely self-contained, 120VAC powered ultrasonic proximity sensors. These sensors are range or distance sensitive, enabling the sensors to detect objects only within the desired range and rejecting others. The RPS-450, 475 are solid state sensors including their solid state outputs, therefore having nearly unlimited life. The sound source operates in the ultrasonic spectrum and is therefore not heard. For initial setup purposes,a built in potentiometer and LED indicator are provided.

The LED indicator illuminates when the ultrasonic wave from the sensor is reflected back to the sensor within the preset range. These sensors provide precise proximity or level sensing regardless of color, density, or transparency. They are equally effective on liquid, metal, plastic, and glass targets.

Specifications

2017-01-16

SO-B0-010 Limiting Current Type Sensor Oxygen Sensors

Measuring gas: Oxygen concentration
Measuring medium: Gaseous atmosphere
Measuring principle: Limiting current type sensor
Measuring ranges: 0.01 – 1.0 vol.% O2

Model Number: SO-B0-010
Data Sheet:
category: Sensors| Gas Sensors | Zirconium Dioxide Oxygen Sensors

Product Specification

SO-B0-010

Limiting Current Type Sensor Oxygen Sensors

When voltage is applied to a zirconia electrolyte cell, oxygen is pumped through the zirconia disc from the cathode side to the anode side because the carriers of the current flowing through the zirconia electrolyte are oxygen ions. By attaching a cap with a pinhole on the cathode side of the cell and by increasing the voltage over the cell the current shows saturation due to the rate limiting step in the transfer of oxygen to the cathode. This saturation current is called limiting current and is nearly proportional to the ambient oxygen concentration.

Below the advantages of the oxygen sensor:
measuring range 0.01 to 1.0 vol.% oxygen
High accuracy
For many types a more or less linear characteristic
Small temperature dependence of the sensor signal
Low interference with other gases
Long service life
In many cases “Single point calibration“ necessary only once

Applications:
Medical
Laboratory
Food industry
Household/Gastronomy
Measuring technique
Security technology/Monitoring
(Electrical-) industry

Characteristic Data:
Measuring gas: Oxygen concentration
Measuring medium: Gaseous atmosphere
Measuring principle: Limiting current type sensor
Measuring ranges: 0.01 – 1.0 vol.% O2
Response time (t90): 2 to 25 sec. (Depends on: sensor type, gas flow, measuring chamber)
Sensor voltage / heating voltage / power consumption / heater cold resistance
Sensor voltage: 0.7 to 1.6 Volt
Heating voltage: 3.6 – 4.4 Volts
Power consumption: 1.3 to 1.8 Watts (depends on application and packaging)
Cold resistance: R( 25°C ) = 3.25Ω ± 0.20Ω

Warm up time: Min. 30 s
Maximum permissible operating temperature: 350 °C (*)
*Depending on the cable and filter assembly (see paragraph: specification, Cable assembly)

Permissible volumetric flow rate (Purging the sensor)
For all sensor types, the maximum flow rate depends on the way of purging the sensor (sensor in direct gas flow, gas beam shape, etc.) and the size of the measuring chamber. Exception: SO-E1-xxx (TO8 + hose connection for direct gassing). Permissible flow
[ml/min]: 100 - 500 (optimal: 250)

Lifetime (MTTF): ~ 20.000 hours (*)
*Depending on measuring medium. Stated lifetime refers to a heated, operated sensor of type SO-xx-250 and SO-xx-960. A failure or reaching the lifetime typically means a slight deviation from the dispatch specifications.

Vibration resistance
Sensors based on the TO8 socket as well as those built with a TO39 socket (SO-Bx-xxx, SO-Ex-xxx, SO-Ax-xxx) meet the European Norm EN60068-2-6 (Sinusoidal vibration tests).

2017-01-06

MB1034 LV-ProxSonar-EZ3 High Performance Ultrasonic Rangefinder - MB1034

● Resolution of 1 inch
● Automatic multi-sensor operation
● People sensor
● 42kHz Ultrasonic sensor measures distance to objects
● RoHS Compliant
● Read from sensor outputs: Serial and Pulse Width
● Small, light weight module
● Designed for easy integration into your project or product
● 2 foot detection zone

Model Number: MB1034
Data Sheet:
category: Sensors&Transmitters| ultrasonic sensor

Product Specification

MB1034
LV-ProxSonar-EZ3
High Performance Ultrasonic Rangefinder

Product Description
These ultrasonic proximity sensors detect objects in a calibrated detection zone. The LV-ProxSonar-EZ sensors report when an object (such as a person) enters the detection zone. The target is released after leaving the LV-ProxSonar-EZ detection zone.

The LV-ProxSonar-EZ3 has a detection zone of ~2 feet and will allow for 13+ simultaneous sensors.

Product Specifications
● Resolution of 1 inch
● ~2.5 second target acquire time*
● ~1.5 second target release time*
● Automatic multi-sensor operation
● People sensor
● Maximum reported range of 254 inches (645 cm)
● ~2 foot proximity detection zone (24 inches or 60 cm)
● Run up to 13+ sensors in the same environment
● Choice of 2 digital outputs: Logic Level (High/Low) and RS232 serial
● 42kHz Ultrasonic sensor measures distance to objects
● RoHS Compliant
● Read from sensor outputs: Serial and Pulse Width
● Virtually no sensor dead zone, objects closer than 6 inches range as 6 inches
● Operates from 2.5-5.5V
● Low 2.0mA average current requirement
● Small, light weight module
● Designed for easy integration into your project or product
● 2 foot detection zone
*Custom times available for a nominal NRE fee