Magnetic Field Meter Gauss Meter, Tenmars, model : TM-197
it use to check or measure existing Magnetic Field, it is suitable for measuring both static (permanent Magnet) and alternating Magnetic Fields. 

The flat probe allows the measurement of even a very small openings, it measures the magnetic field with wider range upto 30000G. It also measure the temperature at the same time. its adustable alarm function warns the operater immediatly as soon as a set measured value is exceeded. 

Measuring Range : 0-300 mili Tesla (mT), Resolution : 0.01 mT
                            0-30000 Gauss (G)

Resolution varies from 0.1 to 1G with the range. 

Multi Air Quality Monitor, Model : TM-380, Tenmars

Features 
Real time measurment of CO2, PM2.5, PM10, Temperature and Humidity.
Maximum / Minimum / average value
Auto power on / off function
Adjustment and calibration function (CO2, Temperature/humidity)
CO2/PM2.5/PM10 red backlight alarm.
manual record and auto-record
Key-press sound assists to ensure the proper operation
Overload indication 
Setting Value  CO2 = 1000PPM, 

(for more details please see catalouge attached)

Multi IAQ Monitor, Tenmars make, Model : TM-380
This air quality meter can measure and display CO2, PM2.5, PM10, Temperature and Humidity. It is a ideal instrument for monitoring indore air quality. 
PM2.5 measuring range  0.500µg/m3
PM10  measuring range  0.500µg/m3
CO2    measuring range  400-9999 ppm
Temp.  measuring range -10 to 50 deg C
Humidity  measuring range  1 to 99%

Digital Vibration Meter, Tenmars make, Model ST-140 or ST-140D

Features :

• Wide frequency range of 10Hz to 5KHz
• Low Range : 10Hz to 1 KHz complies with ISO 2954-2012 Measurement
• Hi Range    : 10Hz to 5 KHz
• Manual : 200 (ST-140)
• Manual + Data Logger : 9999 (ST-140D)
• Accelaration, Vilocity and displacement Measurement
• Vibration sensor with magnetic adapter on 1.2M (47.2") cable
• USB Interface (ST-140D)
• Auto power off with disable function.
• Offset adjustment used for zero function.