pH Paper and other Test Strips
Single-use test materials used to rapidly and semi-qualitatively determine the acidity or alkalinity of liquids or to measure another parameter or substance; may include tests for starch, chlorine, and molybdenum; usually via the use of color-based reactions.
pH Papers, pH strips, pH sticks, and pH test kits are used in laboratory, industrial, and educational environments to qualitatively assess pH levels or monitor acid-base titrations in a range of sample types.pH Buffer reference standards are used for the accurate calibration of pH meters and monitors for far more precise and quantitative pH measurement.
pH Test papers are supplied either as rolls, tear-off strips, or sticks. They are impregnated with indicator dyes that change color at a specific pH. In some products, indicator dyes are covalently linked to cellulose fibers to avoid bleed-out (leaching) and contamination of the test sample.
Some pH papers indicate simple acid or base conditions with a single red-to-blue color change (also called litmus papers). Universal pH papers and strips contain a combination of indicators that cover a range of pH values up to and including 0 to 14 in a single test. The observed color change is checked against a comparison chart supplied with the papers.
Alternatively, for metered assessments of pH, standard or reference pH buffers are used to calibrate pH meters and other electrochemical sensors.
Standard Buffer Characteristics:
• Typically supplied at fixed values of pH 4.01, pH 7.00, and pH 10.01
• May be color-coded for easy and quick identification
• Certified to their nominal pH and accuracy at a specified temperature (typically 20°C)
• Supplied as ready-to-use solutions or concentrates
• Contain antifungals for extended shelf life
Hach Company CLF10sc Free Chlorine Analyzer
CLF10sc Free Chlorine Analyzer (Panel Only) Grab SampleIncludes CL10 sc Panel-1 m digital extension cable-Panel Manual-Chlorine Sensor Manual
Enterprise Technology Solutions Scholastic Teaching Resources First Readers Books, Level D, Gr PK-2, 100/Set, Multi
Jump-start your early reading program with this big collection of child-pleasing, First Little Readers Books correlated with Guided Reading Level D. Sturdy storage box contains 100 full-color books with five copies of 20 titles each with eight pages. Included teaching guide is packed with lessons, tips and literacy-boosting reproducibles. Books are a great, must-have resource for every pre-kindergarten to second-grade classroom.
Hach Company SC4500 Ctrl mA Out 1 anlg pH S
SC4500 Controller-mA Output-1 analog UPW pH/ORP Sensor-100 - 240 VAC-without power cordIncludes Controller-Non-Claros Embedded Prognosys-without power cord includes mounting hardware
MSC Value Collection Gage Block, Square, 0.148 in, Grade 0, Steel
This gage block is a precision measuring tool. It is square, made of steel, and has a size of 0.148 inches with a Grade 0 accuracy. The block includes NIST certification, ensuring high quality and reliable measurements.
- Square shape.
- Grade 0 accuracy.
- Constructed from steel.
- 0.148 inch size.
- Includes NIST certification.
Enterprise Technology Solutions Vtech Phone System,DECT 6.0, 3 Handset, SR/BK
Expandable cordless telephone features three cordless handsets with speakerphones, digital answering system, Voice Announce Caller ID, and HD Audio for a fuller and clearer sound. DECT 6.0 digital technology offers dependable security and range in cordless phones. Interference-free phone system delivers crystal-clear conversations and won't interfere with wireless networks and other electronic devices. Digital security protects you from identity theft by digitizing and encrypting your calls to prevent eavesdropping. Answering system offers 14 minutes of recording time. Phone system is expandable up to 12 handsets using only one phone jack. Conference an outside call between handsets. Each handset features a Push-to-Talk intercom and backlit keypad and display. Phone system includes a 50 name/number Caller ID memory and 50 name/number phonebook directory for frequently called numbers. Language prompts include English, Spanish and French. Phone system includes a wall-mount bracket.
Sigma Aldrich Fine Chemicals Biosciences HettichR MIKRO 220/220R ce1EA
.nbspAvailable in non-refrigerated (220) and refrigerated (220R) versions.nbspAccomodates 0.2-2.0 mL microliter tubes (The refrigerated MIKRO 220R can also accomodate tubes up to 50 mL).nbspExtremely short run-up and run-down times even with rotors attaining higher speeds.nbspCentrifuge chamber of stainless steel.nbspPowered lid-locking with viewing port in lid.nbspQuick entry foil keypad.nbspLid locking and holding during rotor run.nbspLid dropping protection.nbspEmergency lid-lock release.nbspMotor-overheating protection.nbspChamber overheating protection (MIKRO 220R only).nbspImbalance switch-off.nbspAutomatic rotor recognition.nbspEasily exchangeable rotors.nbsp10 programmable memoriesRotors and other centrifuge accessories are sold separately.
Cayman Chemical HIghBIndng 96 Pl 100ea
A GPBAR1 antagonist inhibits taurolithocholic acid-induced increases in cAMP levels in and proliferation of cholangiocytes isolated from patients with autosomal dominant polycystic kidney disease at 100 and 200 UM decreases the viability of and protein levels of GPBAR1 in PANC-1 cells at 10 UM prevents B. pseudocatenulatum-induced decreases in serum levels of IFN-Y and IL-17A in a mouse model of collagen-induced arthritis at 80 mg/kg
Cayman Chemical Surelght PRIdInInCLOroph 100ea
SureLight Peridinin-Chlorophyll Protein Complex (PerCP)Excitation max.: 483 nmEmission max.: 676 nmUses: Flow cytometry/Fluorescence-activated cell sorting
Enterprise Technology Solutions Learning Resources Classroom Learning Clock Kit, GR PreK-4,6/ST,Multi
Engage small groups or individual students in time-telling activities with these student clocks. Color-coded hour and minute functions teach children how to tell time. Mini clocks are designed for children ages 5 and up.