GSM-19T proton magnetometer and gradiometer series 
 Proton magnetometer has been a long time is to use common, inexpensive magnetometer, its uses include metal exploration of mineral resources, mineral resources exploration, environmental and engineering exploration and monitoring magnetic field changes. 
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 ??????????????????????????????????????????????? Figure 1 GSM -19T magnetometer 
 One works?? Magnetometer proton hydrogen-rich liquid to produce precession signal. It uses liquid can provide a very high hydrogen density, and there is no danger in the operation. Polarized DC current through the winding in the coil of the probe of hydrogen-rich proton liquid, will produce a secondary magnetic flux density of 100 Gauss (Gauss). The proton polarization to the strong net magnetization to reach thermal equilibrium with a strong magnetic flux density. ?? Termination of the secondary flux, "polarized" protons which happened to spin and then rearrangement to restore the normal flux density state. According to the following formula, the proton precession frequency f0 of the magnetic flux density B (Tesla units for-Teslas, T) is directly related to: 
 ?????????????? F0 = (γp/2π) Bγp/2π = 42.5763751MHz / T 
 ??? Proton precession measurements must be in sequence, that is, first an initial polarization, followed by the frequency measurement, and then the cycle repeats. This differs from the precession measurement of the continuous measurement in the polarization of hydrogen nuclei at the same time. 
 Two. GSM-19T The main advantage of the standard magnetometer GSM-19T uses a lot of new technology, which is different from other magnetometer, such as: ●? It integrates high-precision GPS (optional). ●? On the host screen, real time observation of the magnetic field image. ? Of the RS232 interface, fast download observational data download rates of up to 115 Kbaud. ●? Resolution up to 0.01nT sensitivity 0.1nT. ●? Standard memory of 32MB, 1465623 field readings can be stored or 5,373,951 bps sets of readings according to user requirements, the amount of memory can be 4MB incremental expansion. ●? Has a unique basis points can be programmed station, the observed functions such as: field magnetometer basis points station to connect automatically correct the date change; the flexibility to set a series of observation schedule and the sampling rate; when you leave basis points in Taiwan for a long time, the function becomes particularly important. ●? Walking Mag acquisition mode using the GSM-19T, to ensure that the operator in the field along as collecting magnetic field data to obtain a continuous profile of the observation. ●? Of GSM-19T Another innovation is in the office, the user can designed observations route and point input to the GPS (optional), and then be observed by GPS command of the operator in the field according to the design. ●? Basis points, observations and field mobile observation with high-precision time synchronization, for observations in the region and to ensure high-precision magnetic interference is very important. ●? Has observed quality control function in the measurement process if hair view of the poor quality of an observation, the operator will hear a warning signal. 
 3. Technical indicators and configuration of technical indicators: ● Sensitivity: 0.05 nT ● Resolution: 0.01nT ● Absolute Accuracy: ± 0.2nT ● Dynamic range: 20000 to 120000nT ●? Gradient tolerance:> 7000nT / m ● Sampling rate: 3 seconds to 60 seconds optional????????????????? ●? temperature drift: 0.0025nT / ° C (ambient temperature of 0 to -40 ° C);??? 0.0018nT / ° C (ambient temperature 0 to +55 ° C)????? ●? Operating temperature: -40 ℃ - +55 ℃ ● Storage 32M-byte basis points to stand on the station can be saved 1,465,623 readings can be saved to 5,373,951 readings gradient measurements can be saved to 1,240,142 readings walk magnetic survey can be saved to 2,686,975 readings ●? very size and weight:????????????????????? host 223 × 69 × 240mm, weight 2.1Kg????? sensor 170mm (length) x 75mm (diameter) and weighs 2.2Kg ●? operating modes: station: 60 seconds every three seconds, automatic sample storage time observations as well as time and date???? ?????? basis points stand: observations, time, date, every 3-60 seconds to read data stored in remote control: selectable RS232 interface for remote measurement ●? input and output: RS232 interface digital output or 6-pin waterproof plug (option) for analog output 
 The standard configuration GSM-19T host GEMLinkw software, internal rechargeable battery, charger, probe and cable, and probe pole, RS232 cable, transport case, a Chinese-language operating manuals. Warranty: two years of life services. ???????????????????????????????? 
 GSM-19T magnetometer instrument range ●? The GSM-19T standard magnetometer ●? Of GSM-19TW standard proton Walking "magnetometer? The GSM-19TV standard proton magnetometer + VLF ●.? Of GSM-the 19TG standard proton gradiometer ●? The GSM -19TGW standard proton Walking Gradiometer? the GSM-19TGV standard proton gradiometer + VLF ●? "Walking" gradiometer of the GSM-19TGWV standard proton + VLF 
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