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Environmental Measuring Instruments

We are reckoned trader and supplier of a wide assortment of Environmental Measuring Instrument. Smis instrumentation is Authorised dealer of LSI LASTEM pyranometer in India. These products are fabricated at our vendors end using supreme grade materials and advanced tools, in compliance with set industrial standards. Apart from this, we also provide installation services of these products for our valuable clients.


The solar irradiation sensor or solar pyranometer measures global radiation, the sum at the point of measurement of both the direct and diffuse components of solar irradiance. The sensor's transducer, which converts incident radiation to electrical current, is a silicon photodiode with wide spectral response. From the sensor's output voltage, the console calculates and displays solar irradiance. It also integrates the irradiance values and displays total incident energy over a set period of time.

The outer shell shields the sensor body from thermal radiation a level indicator, and fins to aid in aligning the sensor with the sun's rays. The diffuser is welded to the body for a weather-tight seal; it provides an excellent cosine response. The transducer is a hermetically-sealed silicon photodiode with integrated amplifier. Spring-loaded mounting screws, in conjunction with the level indicator, enable rapid and accurate leveling of the sensor. Each sensor is calibrated against a secondary standard pyranometer in natural daylight.





    Operating Temperature

    -40° to +65° C

    Storage Temperature

    -45° to +70°C


    Silicon photodiode

    Spectral Response

    400 to 1100 nanometers

    Cosine Response

    Percent of Reading

    Percent of Full Scale

    ±3% (0° to ±70° Incident angle)

    ±10% (±70° to ±85° Incident angle)

    ±2% (0° to ±90°)

    Reference temperature


    Temperature Coefficient

    + 0.12% per °C

    Housing Material

    UV-resistant PVC plastic


    < 300 g including mounting hardware


    0 to 2000 W/m2


    ±5% of full scale


    up to ±2% per year

    Excitation Voltage

    12  to 24VDC

Wind Speed Sensor (Cup Anemometer) - WSS-100

Wind Speed Sensor or Cup Anemometer is designed with rugged components stand up to hurricane-force wind yet is sensitive to a light breeze. It includes sealed bearings for long life. The range and accuracy specifications have been verified in wind-tunnel tests.

Theory of Operation

The sensor's cup assembly consists of three cups mounted on a cup assembly hub. A shaft, which rotates on precision-sealed ball bearings, connects the cup assembly to a magnet assembly. When the shaft is rotated, the turning magnet assembly causes Close sensor. It closes every rotation of the shaft. The pulses produced by this closure is counted by the connected electronics.




    Wind Speed Sensor (Cup Anemometer) - WSS-100

    Sensor Type:

    Three cups

    Material :

    Control Head UV-resistant ABS, Wind Cups : Polycarbonate


    0 to 250Km/Hr.

    Startup wind speed

    0.1m/s or 0.36Km/Hr.


    ±3% FS

    Operating Temperature

    -40° to +65° C

    Storage Temperature

    -45° to +70°C


    3 Cup 15cm

    Sensor Cable Length 


    Weight with Electronics Assembly 

    141 gram 

    Weight with mounting Accessories 

    336 grams 

    Excitation Voltage 

    12 to 24VDC

LSI LASTEM Pyranometers - DPA053

Radiometer for solar irradiance measurement, according to Second calss as ISO 9060 and WMO No:8 Standards. This sensors is good compromise for basic meteorological and agrometeorological and solar energy applications.




    LSI LASTEM Pyranometers - DPA053




    10÷15 μV/W/m²



    Calibration Certificate


    Measuring Range

    0 ÷ 2000 W/m²

    Operative Temperature


    Viewing field


    Spectral Range



    L=5 m Included

    ISO 9060 2018 Classification

    Class C ( Second Class)

    IEC 61724-1:2017 Classification

    Class C

    Stability ( drift/year)




    Directional response

    30 W/m²

    Sensitivity/year variation


    Temperature response


    Calibration traceability

    To WRR

    Recommended recalibration

    Every 2 years

    General Information

    Housing - Anodized aluminum

    Protection rate - IP-66

    Anti-radiation shield - Included


  •    Spectrally flat Class C ( Second Class) Pyranometer
  •    Compliance with IEC 61724-1:2017
  •    Calibration traceability to WRR
  •    Ideal Instrument in PV Plants Performance monitoring and metrological networks

Lux Transmitter


  •    To Measure Illumination / Light Intensity
  •    4 ~ 20 mA Output
  •    On-site, Two point's calibration. (Zero &Span)
  •    Silicon Photo Sensor provide good match to
  •    light spectrum & long-term stability
  •    Mounts easily, Lowest cost.

Humidity Transmitter

We are here engaged in the specified business of offering Temperature Humidity Transmitters. Our experts carry out the designing procedure at our workplace using latest technology and thus, are offered with the assurance of giving flawless performance. These transmitters are used specifically in climatic rooms, chambers, green houses, textile industries and several others.


  •    Fast, Stable and accurate
  •    IP 65 - Watertight enclosure
  •    Excellent long term stability
  •    Onsite two point calibration

Hygrometer External Sensor

Item Code: 288ATH
Used for the purpose of measuring the moisture content in the atmosphere, the offered Hygrometer External Sensor is known to be amongst the finest that is available in the market. The offered product's superior accuracy, longer service life and user friendly nature, is owed to our utilization of high quality raw materials and modern machines, in accordance with the set industry norms and guidelines.


  •    Easy handling
  •    Highly accurate
  •    Impeccable performance

Thermo Hygrometer

Item Code: 103CTH
We are considered in the market to be one of the leading manufacturers and suppliers of this highly commendable range of Thermo Hygrometer. For reasons of providing the finest, we engage in the utilization of high quality raw materials and modern technology. Owing to this, the offered product is known to have a superior performance, longer service life and commendable accuracy.


  •    Accuracy
  •    Superior performance
  •    Longer service life


Item Code: Testo608H1
We are one of the pre-eminent names of the business, which engages in manufacturing, trading and supplying Digital Hygrometer. This efficient and ruggedly constructed hygrometer is manufactured in accordance with the set industry guidelines. Owing to the lightweight, accurate measurement, efficient performance and low maintenance, these devices are massively sought after.


    Storage temperature-40 to +70 °C
    Dimensions111 x 90 x 40mm
    Operating temperature0 to +50 °C
    Battery type9V block battery
    Battery life8736 h
    Weight168 g
    Dimensions120 x 89 x 40 mm
    TypeLCD Dual Display
    Measuring range0 to +50 °C
    Resolution0.1 °C
    Measuring range+10 to +95 %RH
    Resolution0.1 %RH


  •    Consistent operation
  •    Longer functional life
  •    Wall mountable

UV Light Meter

Item Code: UV-340
UV Light Meter Lutron UV-340A

Monitoring blue light radiation hazards in welding.
UV sterilization
Graphic arts.
Photochemical matching.
UV EPROM erasure.
Photoresist exposure.
Curing of inks, adhesives and coatings.

Weathering " degradation studies."
UV sterilization
Microbial genetics.
DNA research.
Biologic hoods.
General laboratory use.


  •    Professional, high quality UV meter.
  •    Ultra-violet irradiation measurement for UVA & UVB.
  •    UV detector spectrum from 290 nm to 390 nm.
  •    Hi, Lo measurement range. 19990 and 1999 uW/cm^2.
  •    Exclusive UV sensor structure.
  •    Sensor with cosine correction filter.
  •    Build Zero button.
  •    Microprocessor circuit provides high reliability and durability.
  •    Separate UV LIGHT probe allows user to measure the UV light at an optimum position.
  •    LCD display, easy readout.
  •    Heavy duty & compact housing case.

O2 Meter

Item Code: PO2-250
We are considered a trustworthy name in the business, which manufactures, trades, imports and supplies O2 Meter. Due to the lightweight, accurate measurement and excellent response time, the proffered assemblage is extensively famous among our valued customers. Before the final transmission, all our products are tested on multiple parameters for their flawlessness and quality.


  •    Longer operational life
  •    Lightweight
  •    Accurate results

Clean Room Monitor

Item Code: CRM-01
Our company is the preferred choice of our customers for manufacturing, trading, and supplying Clean Room Monitor that is precisely designed and developed by our experts. Offered monitor comes with alarm settings for all three parameters with an in-built buzzer. Made available in numerous specifications, these monitors are vastly appreciated and accepted for their consistent operation.


  • 3 Digits 0.56” RED 7 Segment LED for Humidity.
  •   3 Digits 0.56” RED 7 Segment LED for Temperature
  •   3 Digits 0.56” RED 7 Segment LED for Pressure
  • Range
  • a. 0-95% for %RH
  •   b. -20.0 to +80.0C for Temperature
  •   c. 4-20mA => -118 to +118 Pascal for Pressure
  • Resolutiona. 0.1% for Relative Humidity
  •   b. 0.1C for Temperature
  •   c. 1 Pa for Pressure
  • Control LogicBuzzer ON for Pressure > Set Point for Pressure OR Temperature > Set Point for Temperature OR Humidity > Set Point for Humidity
    Alarm IndicationBlinking of display of parameter > Set Point with buzzer On
    Accuracy± 2% ± 1 Least Significant Digit for Humidity.
  •   ± 0.3C ± 1 Least Significant Digit for Temperature
  •   ± 2Pa ± 1 Least Significant Digit for Pressure
  • SettingsIndividual set points by front panel switches
    MemoryNon-volatile memory for saving all Set Points
    Power Supply230V AC ± 15% at 50/60Hz (Supply cord provided)
    Mounting TypeWall Mounting
    Front Fascia
  • 6.2x6.7x2.2” (WxHxD) (without externally mounted sensors)
  • 1.0 Kgs


  •    Efficient
  •    Accurate results
  •    Minimal maintenance required

Solar Power Meter


1. Meteorology application
2. Agriculture application
3. Physics & optical laboratories
4. Solar radiation measurement
5. Solar trans mission measurement
6. Solar power research
7. Identify high performance windows
8. Helpful to set up solar pv panels at optimum angles of incidence
9. Light intensity measurement for the car windows


2000 w/m2 , 634btu/(ft2 x h)

Sound Level Meter

Our company is involved in the manufacture, trade, supply and import of specifically designed and developed Sound Level Meter App. Made available in different specifications, these efficient and high functionality meters are massively appreciated among our clients. Due to the consistent performance and lightweight, these sound meters are vastly sought after.


    Applicable StandardsIEC 651 And 804 Type 2, ANSI S1.4 Type 2
    Accuracy0.5 dB
    Resolution0.1 dB
    Digital Display4 digital LCD
    Measurement ParametersSPL, Leq, SEL, MaxL, MlnL
    Measurement Range30 dB to 130 dB
    Linearity Range100 dB
    Responseimpulse, Fast and Slow
    Microphone1/2" electret condenser microphone
    Sampling timeupdated every 0.5 s
    Bar Graph4 dB steps, 100 dB range, 100 ms update
    Display Warning Function Over range Indicator Uniden range IndicatorDisplayed at the upper limit Displayed at the lower limit
    Analog AC/DC Output2 Vrms (at full scale), 10 mVD/dB
    Power Supply Battery LiteFour 1,5 V AA batteries, Optional AC adapter Approximately 20 hours
    Dimensions10.4 x 2.8 x 0.8" (265 x 72 x 21 mm)
    WeightI0.90 z (3 l0g)


  •    Easy to carry
  •    Accurate
  •    Reliable performance

Wind Data Logger

The Wind data logger is a complete system to accurately measure and record 3 channels wind speed and 1 channel direction.This low cost wind speed and direction recording system comes complete with a data logger, a three-cup anemometer and cable, a dogvane and cable, and the necessary accessories to quickly get up-and-running.A SD/TF card is used for storage. Records count only depends on the size of card. And the files on card is extendedof ".csv", easy to be import to Excel or other software for analysis and making chart



    Measurements: 3 channels wind speed, 1 channel wind direction

    Measurement range: 0-45m/s, 0-359 degrees

    Resolution: 0.1m/s, 1 degree

    Reading rate: 1 minute to 60 minutes configurable

    Memory: 4G SD card, over 80,000,000 readings

    Engineer units: MPH, KPH, M/S, KNOTS

    Operating environment: -20 to 60ºC (-4 to 150ºF), 0 to 90% Relative Humidity non-condensing

    IP rating: IP40(Weatherproof enclosure: IP65)

    Display: 16*2 Mono color LCD with back light

Wind Sensor

Item Code: WS-120
We are considered a trustworthy name in the business, which engages in manufacturing, importing and supplying Automatic Wind Sensor that is specifically designed by our experts. Made available in numerous specifications, these accurate sensors are vastly appreciated for their excellent response time and good operating speed. Clients can obtain the range at industry leading costs.

Output: ( According to Customer Requirement)

1. Voltage output Ex: 0 to 5V or 0 to 10VDC
2. Curent Output: 4 to 20mA DC
3. Modbus Output

Note: Minimum Order Quantity: 1 qty


  •    Durable
  •    Sturdy in construction
  •    Constant performance

Wind Speed Sensor

We are one of the celebrated manufacturers, importers and traders of an extensive assemblage of Wind Speed Sensor. The proposed collection is manufactured in compliance with the set industry guidelines. Used for the measurement of the speed of the wind, these efficient and accurate sensors are majorly used at major weather forecasting centers. Due to excellent performance, these are vastly applauded.

Output: ( According to Customer Requirement)

1. Voltage output Ex: 0 to 5V or 0 to 10VDC
2. Curent Output: 4 to 20mA DC
3. Modbus Output


  •    Attached Cable Length: 40' (12 m)
  •    Cable Type: 4-conductor, 26 AWG
  •    Connector: Modular connector (RJ-11)
  •    Maximum Cable Length: 240' (73 m)
  •    Dimensions: 15.0" x 1.5" x 18.0
  •    Range: 250 KPH 0- 360 Deg C
  •    Accuracy: ±3 km/h, ±5 %, whichever is greater ±3 Deg C


  •    Consistent performance
  •    Reliable in operation
  •    Rugged in construction

Wind Speed

Output: ( According to Customer Requirement)

1. Voltage output Ex: 0 to 5V or 0 to 10VDC
2. Curent Output: 4 to 20mA DC
3. Modbus Output



    Sensor Type:

    Three cups

    Material :

    Control Head UV-resistant ABS

    Wind Cups : Polycarbonate

    Range :

    2 to 60m/sec

    Output :Pulse:

    60 Hz = 240 Km/hr

    Dimensions :

    3 cup Dia 15 cms

    Cable length:

    2 meters

Automatic Weather Station

Item Code: VUE
Being the favored choice of our customers, our company is involved in manufacturing, importing, supplying and trading Automatic Weather Station. Owing to the rugged construction, longer operational life, high weather resistance and accuracy, these stations are massively admired in the market. To prevent breakage, we offer the selection in tamper proof packaging. Clients can avail the range at affordable rates.


  •    Rugged in construction
  •    Longer service life
  •    Consistent performance

Wind Direction Sensor

Output: ( According to Customer Requirement)

1. Voltage output Ex: 0 to 5V or 0 to 10VDC
2. Curent Output: 4 to 20mA DC
3. Modbus Output


  •    Wind Direction : Wind vane potentiometer Type
  •    Material : UV-resistant ABS
  •    Range : 0- 360 Deg
  •    Accuracy : ±3 Deg C
  •    Pot Range :20 Kohms

Rain Gauge

Item Code: RG7852
Our company is considered a trustworthy name in the industry that brings forth Rain Gauge that is widely applauded and accepted, due to correct measurement. Manufactured in accordance with the predefined industry guidelines these efficient and easy to use rain gauges are extensively popular. Offered rain gauges are checked for their flawlessness, before handing over to the clients.


  •    Longer functional life
  •    Easy to operate
  •    Weather resistant

Digital Rain Gauge

RAINEW 111 Tipping Bucket Wired Rain GaugeThe Rainew series of gauges meet the National Weather Service specifications for accuracy. The tippingbucket rain gauges come with an 8" orifice The wired units come standard with a 60 foot cable.The Rainew 111 comes with a single display unit that will display up to 9.99 inches of rainfall in 1/100th increments.

Weather Station

We are among the pre-eminent names of the business, which engage in manufacturing, trading, importing and supplying a massive assortment of Weather Stations. Made available in numerous specifications, these sturdily constructed stations are immensely popular among our valuable customers. Proffered range is vastly used for measuring indoor & outdoor temperature, wind direction & speed, humidity, dew point, heat index, rainfall and other details as well.


    Barometric pressure26 to 32" Hg, 880 to 1080 m bar±0.03" Hg, ±1.0 m bar
    TemperatureInside32 to 140° F (0 to 60° C)±1° F (0.5° C)
    Outside—40 to 150° F (-40 to 65° C)
    Heat index—40 to 135° F (-40 to 57° C)±3° F (1.5° C)
    Relative humidityInside10 to 90%±5% of full scale
    Outside0 to 100%±3% of full scale
    Dew point—105 to 130° F (-76 to 54° C)±3° F (1.5° C)
    WindDirection0 to 360°±7°
    Compass rose16 compass points±7°
    Speed2 to 150 mph, 2 to 130 knots, 1 to 67 m/s, 3 to 241 km/hr±5% of full scale
    Chill—110 to 130° F (-79 to 54° C)±2° F (1° C)
    Rainfall0 to 99.99'±4% of full scale
    Time24 hours (12- or 24-hour format)±8 sec/month
    DateMonth/day±8 sec/month
    Solar radiation0 to 1800 W/m2±5% of full scale
    UV radiationUV index0 to 16±5% of full scale
    UV dose0 to 199 MED±5% of full scale


  •    Sturdy construction
  •    Weather resistant
  •    Efficient performance

Radiation Sensor

Item Code: PYRA-300V2
Manufactured in compliance with the set industry norms and guidelines, quality of this Radiation Sensor never deteriorates. Owing to the finest raw materials and modern machines applied in its making, gives the product superior service life, high accuracy and an unmatched performance. In addition, the offered product is marked at the most reasonable rate possible.

Output: ( According to Customer Requirement)

1. Voltage output Ex: 0 to 5V or 0 to 10VDC
2. Curent Output: 4 to 20mA DC
3. Modbus Output


  •    High durability
  •    Unmatched accuracy
  •    Superior service life

Solar Radiation Sensor

Being one of the preferred choices of our customers, we are engaged in manufacturing, trading, importing and supplying an unlimited assemblage of Solar Radiation Sensors. Manufactured in adherence to the predefined industry guidelines, these supreme functionality and efficient devices are massively acknowledged. It is because of the optimum operating time and accurate measurement, the range is immensely popular.

Output: ( According to Customer Requirement)

1. Voltage output Ex: 0 to 5V or 0 to 10VDC
2. Curent Output: 4 to 20mA DC
3. Modbus Output


  •    Operating Temperature: -40° to +65° C
  •    Storage Temperature: -45° to +70° C
  •    Transducer: Silicon photo diode
  •    Spectral Response: 400 to 1100 nanometers
  •    Cosine Response:
  •    Percent of Reading: ±3% (0° to ±70° ), ±10% (±70° to ±85° )
  •    Percent of Full Scale: ±2% (0° to ±90°)
  •    Temperature Coefficient: + 0.12% per °C
  •    Reference temperature: 25° C
  •    Housing Material: UV-resistant PVC plastic
  •    Weight: 250 g
  •    Range 0 to 1800 W/m2
  •    Accuracy: ±5% of full scale
  •    Drift: up to ±2% per year
  •    Output: 0 to 3 VDC (0- 1800 w/m2)
  •    Power supply: 5 VDC ± 5 %; 1 mA (typical)


  •    Rugged in construction
  •    Lightweight
  •    Efficient in performance

Pyranometer Shadow Ring

When properly installed an d routinely adjusted, the Shadow-Ring obstructs thedaily direct beam solar component from irradiating the radiometer mounted within the shadow-ring, from sunrise to sunset. Mechanical adjustment of the Shadow Ring is recommended every two days for optimal measurement performance. The resulting measurement when optioned with a class 1 pyranometer is representative of the total global diffuse short-wave irradiance signal in W/m². Because the shadow-ring obstructs a portion of the diffuse sky field measured by the pyranometer, it is recommended to apply a small multiplier correction to account for the sky-field obstruction in the calculated diffuse irradiance measurement results. When used in conjunction with a second non-shaded pyranometer, it is possible to infer direct beamsolar disk irradiance by subtracting the corrected shaded pyranometer diffuseirradiance values from the non -shaded pyranometer global solar irrad iance values, forthe same time indices sampled.]

The Shadow Ring provides a reliable cost effective solution for deriving the constitute global short-wave diffuse and direct beam solar irradiance components, incontrast to auto-tracking radiometer instrument solutions costing thousands more


The PYRANO-10 pyranometer is intended for routine global solar radiation measurement research on a plane/level or Inclined surface. Fully compliant with ISO 9060:1990 specification for a First Class pyranometer, the PYRANO-10 features a thermocouple junction connected in series as sensing element. The sensing element is coated with a highly stable carbon based non organic coating, which delivers excellent spectral absorption and long term stability characteristics. PYRANO-10 has improved performance due to the increased thermal mass and the double glass dome construction. It is ideal for cost-effective, good quality, measurements in hydrological networks, Solar, agriculture.

The integral bubble level is raised to the top of the housing and can be viewed without removing the redesigned snap-on sun shield, which also covers the connector. The connector is provided for Signal output The screw-in drying cartridge is easy to remove and the replacement desiccant is supplied in convenient refill packets. The Pyranometer does not require any power, it supplies a low voltage of 0-20mV in relation to the amount of incoming radiation


  •    Spectral range: 300 ~ 3000nm
  •    Signal range: 0 ~ 2000W / m 2
  •    output signal: 0 ~ 20mV
  •    Sensitivity: 7 ~ 14µV / W . m -2
  •    Impedance: 350 Ω
  •    Response time: (to 95%) < 30s
  •    Zero off-set: a) 200 W/ m 2 + 15 W/ m 2 b) 5K/h ± 4 W/ m 2
  •    Non-stability: (per year) ± 1.5%
  •    Non-linearity: ( 100-1000W/ m 2) ± 1%
  •    Directional response: (w.r.t. 1000 W/ m 2 ) ± 20 W/ m 2
  •    Spectral selectivity: (0.35 to 1.µm) ± 5%
  •    Temperature response: (for 50K interval) 4%
  •    Tilt response: (0-90°) ± 2%
  •    Operating ambient temperature: -50 °C ~ +80 °C
  •    Operating humidity: 0% ~ 100% RH

About SMIS

Smis Instrumentation is founded in the year 2011, is a professional Test & measuring Instrumentation Company.

Smis instrumentation is in manufacturing, sales, service and calibration of measuring and testing equipments for Mechanical, electrical and electronics industries, Pharmaceutical, Defense, Food, Automobile, Textile, R & D Centers, Process Automation Sectors, etc.

Contact Address

#10, Ground Floor, Ward No. 132,
1st Cross, 3rd Stage, CHBS Layout
Near St. Flowers English school, Attiguppe, Vijayanagara,
Bangalore - 560040
Karnataka, India

072 59 817300 / 072 59 817301