How Safe Is Your Sushi Rice?

We learned from one of our customers that sushi rice has the potential to become a host for pathogens if not properly prepared. To protect against this, it is imperative that proper amounts of vinegar are added to maintain optimum acidity.

To ensure proper acidity levels are achieved, a pH meter should be used to test each batch of rice. A maximum pH reading of under 4.6 is generally considered safe.  In many states, there are specific laws in place that state sushi rice pH MUST be between 4.1-4.6. 

There are two different ways that you can measure the pH of sushi rice.  Method one is to use a pH meter with a probe for measuring non-liquid items such as rice. We used the Sper Scientific Basic pH Meter (840087) in our experiment and a Spear Tipped pH probe (840049), which is designed especially for measuring non-liquid items.  We also used Sper Scientific Large Display pH Pen (850050) and compared the methods.

The meter and probe is by far the easier of two methods in that you can simply insert the spear tipped probe into rice and get your reading.  In order to use the pH pen you have to make a slurry (instructions below) in order to take your readings.  When using the slurry method you need to ensure there is enough moisture in the rice for the electrode to be fully saturated. In either case, you should conduct a pH test within 30 minutes after acidification of cooked rice to accurately test your sushi rice.

To make a rice slurry you start by gathering a ¼ cup sample of cooked, acidified rice taken from various locations in the batch and add ¾ cup of distilled water in a clear cup. Blend the slurry for 20 seconds to create a thorough mix. Once you have created your slurry mix you insert the pH pen in the mixture and let it rest for few seconds before you take your reading.

In both cases, you should calibrate your meter and probe with both a pH4 and pH7 calibration solution prior to taking your readings to ensure the accuracy of your readings. 

Sper Scientific offers several pH meters and pH pens that can be used to test the pH of your sushi rice.  The pH meters can be purchased for as little at $77 and the spear tipped probe costs $83.  The pH pens start at $37.  Below are links to a few of our meters, pens, and to the Spear Tipper probe.


840087– Basic pH Meter

850055– Advanced pH Meter

850057K– AquaShock (Water and shock proof) pH meter

840049– Spear Tipped Probe

850050– Large Display pH Pen

850051– Large Display ATC (Automatic Temperature Compensation) pH Pen


It’s Summer Time! Time To Be Aware Of Heat Stress.

Workers who are exposed to extreme heat or work in hot environments may be at risk of heat stress. Exposure to extreme heat can result in occupational illnesses and injuries. Heat stress can result in heat stroke, heat exhaustion, heat cramps, or heat rashes. Heat can also increase the risk of injuries in workers as it may result in sweaty palms, fogged-up safety glasses, and dizziness. Burns may also occur as a result of accidental contact with hot surfaces or steam.

Workers at risk of heat stress include outdoor workers and workers in hot environments such as firefighters, bakery workers, farmers, construction workers, miners, boiler room workers, factory workers, and others. Workers at greater risk of heat stress include those who are 65 years of age or older, are overweight, have heart disease or high blood pressure, or take medications that may be affected by extreme heat.

Prevention of heat stress in workers is important. Employers should monitor their workers environment for heat stress and provide training to workers so they understand what heat stress is, how it affects their health and safety, and how it can be prevented.


Sper Scientific offers several heat stress meters to help employers monitor the conditions of their workforce. Below are just of the temperature monitors that we offer.

WBGT Heat Stress Meter

WBGT SD Card Logger

Remote RH / Temp Monitor

Digital Humidity Temperature Monitor – Large Display

Compact Humidity Temperature Monitor


Click here to see all of our temperature meters

Toilet Tap- Is This The New Norm?

A recent article found on discusses the current drought situation in Wichita, TX.  Due to the effects of a 3 year drought Wichita is struggling to find water resources that they can tap into to effectively cover the Wichita population.  However, the town is looking into a rather controversial solution turning toilet water to tap water.

Due to the declining tap water resources in Wichita, the town has found another solution to the water problems by treating wastewater and transforming it into water safe enough to drink!  The logic behind this water solution is to put the wastewater through two water treatment processes.  The first being the normal wastewater treatment process followed by the drinking water treatment process.

To learn more check out the video at by clicking here.

What are your thoughts about Toilet Tap?

Sper Scientific carries a variety of products to help monitor drinking water and waste water treatment:



Aqua Shock

Multiparameter Meters

Turbidity Meter

pH Pens

Free Chlorine Meters

Bench Tops


Water Quality

What Are The Key Components and Ways To Save Our Waterways And Fisheries?

Water conservation is a frequently discussed topic in terms of household use, government regulations, and agriculture and water management. As the global population increases, it is becoming more critical to manage water resources and the ecosystems that rely on them. An article found on the Science Daily discusses the components of a successful freshwater management plan and nine ways to save our waterways and fisheries.

“Humans have put key freshwater ecosystems at risk because of land development and the loss of the vegetation along rivers and streams.” says John Richardson, a professor in the Dept. of Forest and Conservation Sciences at the University of British Columbia.  Richardson is one of 15 freshwater biologists who created the framework to help protect fish and ecosystems into the future.

According to Richardson, “Humans also depend on these ecosystems for basic resources like clean drinking water and food as well as economic activity from the natural resource sector, tourism and more.”

Richardson and his colleagues created a framework of evidence-based principles that managers, policy makers and others could easily use in their work.

Richardson states the components of a successful freshwater management plan should include:

  • Protect and restore habitats for fisheries
  • Protect biodiversity as it enhances resilience and productivity
  • Identify threats to ecosystem productivity
  • Identify all contributions made by aquatic ecosystems
  • Implement ecosystem based-management of natural resources while acknowledging the impact of humans
  • Adopt a precautionary approach to management as we face uncertainty
  • Embrace adaptive management — environments continue to change so research needs to be ongoing for scientific evidence-based decision making
  • Define metrics that will indicate whether management plans are successful or failing
  • Engage and consult with stakeholders
  • Ensure that decision-makers have the capacity, legislation and authority to implement policies and management plans.

What are the 9 guiding principles as defined by Richardson and his colleagues?

  • Acknowledge the physical and chemical limits of an ecosystem
  • Population dynamics are at work and there needs to be a minimum number of fish for the population to survive
  • Habitat quantity and quality are needed for fish productivity
  • Connecting habitats is essential for movement of fish and their resources
  • The success of freshwater species is influenced by the watershed
  • Biodiversity enhances ecosystem resilience and productivity
  • Global climate change affects local populations of fish
  • Human impacts to the habitat affect future generations of fish
  • Evolution is important to species survival

According to Richardson, “healthy freshwater ecosystems are shrinking and reports suggest that the animals that depend on them are becoming endangered or extinct at higher rates than marine or terrestrial species.”

What are your thoughts on how we can save our waterways?

Harsh Environments Are Perfect For AquaShock®

Demanding work environments such as a power plants, aquaculture, and water treatment facilities understand the need for measurement instruments that are designed to survive in the harshest of places. Since its launch in 2012, the AquaShock® line of handheld waterproof  water quality meters changed the industry. The AquaShock® is not only IP67 waterproof, but they are the first to feature waterproof probe attachment points that also accept standard (non-waterproof) BNC probes.

According to company President Devin Sper, “the probe connection point has always been a vulnerability of other meters claiming to be waterproof. The probe is either non-replaceable, or the meter is not truly waterproof when the probe is connected, which defeats the purpose.”

AquaShock® meters feature a screw-down, waterproof housing surrounding the BNC probe connection. When a waterproof connection is not needed, any BNC-connected probe can be utilized. AquaShock® meters are also shockproof, and feature a “soft-grip” surface to help prevent accidental drops, making them perfect for field use. Other features include a large, backlit LCD display, 99-memory review, min/max/average, internal clock and calendar, C° & F°, auto-ranging, and automatic temperature compensation.

There are four AquaShock® models available, all with five-year warranties, measuring pH, mV, ORP, Dissolved Oxygen (DO), conductivity and TDS.  Full product information on the AquaShock® line of water quality meters is available at

Sper Scientific Offers NIST Traceable Instrument Certification At Its Headquarters In Scottsdale, Arizona.

At Sper Scientific, we certify two categories of instruments: 

  • Newly purchased instruments are certified prior to shipment, which may extend your order ship day by up to 10 business days. Not all instruments can be certified, when certification is possible an ordering option will appear on the product page.
  • Previously purchased instruments are returned annually to Sper Scientific for certification, and may take up to 10 business days to certify.

Purpose of the Program:
There is an increasing requirement by customers for documentation supporting manufacturer’s claims of accuracy on their scientific equipment. This is partially due to the increasing acceptance of quality standards, such as ISO 9000* and GMP**, which require that periodic certification of test equipment be performed and documented.  Most testing is done in-house with our own state-of-the-art equipment. Whenever possible and practical, we use N.I.S.T. traceable equipment and N.I.S.T. procedures.

* ISO 9002 1987 (E) Section 4.10
** FDA Good Manufacturing Practices Section 820.61

Each certified product comes with:
• A serial number
• A calibration or certification label
• One of three certificates.*

For a complete list of certified products please go to

Water Quality Meter Consolidates Multi-Parameter Water Testing into a Single Device

The Sper Scientific Water Quality Meter Model 850081 uses interchangeable probes to read pH, mV, conductivity, TDS, DO, temperature and ORP, diminishing the need for multiple devices dedicated to testing limited parameters. The user can order probes for only the parameters currently required, and add additional probes in the future. Intelligent probes electronically retain calibration information. No recalibration is required when changing probes.

The display simultaneously reads temperature in user selectable °C & °F, and all measurements are automatically temperature compensated. RS232 port enables communication with a computer. Also features auto power off, hold, min/max, fold-out easel back and a tripod screw. Comes with 9V battery and a hard-shell, foam-lined carrying case with room for one or two probes.

The Sper Scientific Water Quality Meter is ideal for field or plant use in a municipal drinking water or waste-water setting, and is available direct from the manufacturer at 

Noise Measurement with Maximum Versatility

The Sper Scientific Advanced Datalogging Sound Meter (Model 850013) uses a single range of 30 ~ 130 dB.  This dynamic range eliminates the need to manually select and change ranges, alleviating the problem of lost data associated with range changes in auto-ranging models.

All test parameters are simultaneously displayed on a large, bright backlit display featuring 0.1 dB resolution and a bar graph.  Automatically log up to 31,000 records for later download, or manually save and recall 99 data points with date and time stamp directly on the meter’s LCD. The bi-directional USB port and software enable control of the meter via its on-screen image, and the optional microphone extension enables up-close measurements of hard-to-reach areas.

Accurate within ±1.4 dB and meets or exceeds all other specs for an ANSI S1.4 and IEC 61672-1 Type 2 meter. Also features A/C and fast/slow weighting scales, min-max, over/under alarms, AC or DC recorder output and auto power off. Calibrate in compliance with OSHA using Acoustical Calibrator.

The Sper Scientific Advanced Datalogging Sound Meter is available directly from the manufacturer at

Sper Scientific Min-Max Thermometers Offer Accurate and Affordable Temperature Monitoring

Used for greenhouse temperature monitoring, the Sper Scientific Min-Max Thermometer is available in two models. Model 736680 includes a magnetic float reset and features dual scales of -50/50°C & -60/120°F. Model 736690 features a push-button reset and dual scales of -50/50°C & -60/120°F.

Sper Scientific Min-Max Thermometers allow easy spot checking of temperature in a greenhouse or other temperature-sensitive environment.  Sper Scientific Min-Max Thermometers are available at

Four Cups? Not With Our Anemometer

An anemometer is a device used for measuring wind speed. The term is derived from the Greek word anemos, meaning wind, and is used to describe any air speed measurement instrument used in meteorology oraerodynamics. The first known description of an anemometer was given by Leon Battista Alberti around 1450. The simplest form in common use is the cup anemometer, which catches the wind with rotating cups, usually four. Cup anemometers are still used for wind, power performance evaluations and site calibrations.

An anemometer is also a common instrument used in HVAC. Specifically for indoor air quality and HVAC / R technicians measuring Heat / Ventilation / Air conditioning / Refrigeration wind flow and temperature in residential, commercial and industrial air conditioning systems. Data Centers and other hi-tech manufacturing operations use anemometers to insure that the air flow is sufficient to maintain proper temperature or cleanliness of the facility.

The Sper Scientific Model 840001 Datalogging Anemometer automatically records up to 16,000 data points in the field, along with time and date. This data can later be downloaded to a computer with the included software or logged in real time. The software also enables real time data logging directly from the anemometer to the computer. The microprocessor calculates air volume (CFM) as well as air velocity and min/max and simultaneously displays air temperature in ºC or ºF. Also reads type-K or J thermocouple probes. Features a calendar/clock, auto power off, and hold functions. This well-made anemometer has a detachable probe, fold-out tripod and a large easy to read LCD. Comes ready to use in a protective foam lined carrying case complete with metal vane anemometer probe, software, RS232 computer connection cable, 4 AA batteries, and a 3V button cell battery.